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Cas Database

1121-60-4

1121-60-4

Identification

  • Product Name:2-Pyridinecarboxaldehyde

  • CAS Number: 1121-60-4

  • EINECS:214-333-6

  • Molecular Weight:107.112

  • Molecular Formula: C6H5NO

  • HS Code:29333999

  • Mol File:1121-60-4.mol

Synonyms:Picolinic aldehyde;2-Picolinaldehyde;Pyridine-2-carbaldehyde;Picolinal;2-Pyridaldehyde;o-Nicotinaldehyde;Pyridine-2-aldehyde;Picolinaldehyde;Picolinaldehyde (8CI);2-Formylpyridine;Pyridine-2-carboxaldehyde;2-Picolinealdehyde;2-Pyridylaldehyde;2-Pyridinemethanol or 2-pyridinecarboxaldehyde;2-Pyridine carboxadehyde;

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Safety information and MSDS view more

  • Pictogram(s):ToxicT,DangerousN

  • Hazard Codes:Xn,Xi,N,T,F

  • Signal Word:Danger

  • Hazard Statement:H302 Harmful if swallowedH315 Causes skin irritation H319 Causes serious eye irritation H330 Fatal if inhaled H411 Toxic to aquatic life with long lasting effects

  • First-aid measures: General adviceConsult a physician. Show this safety data sheet to the doctor in attendance.If inhaled If breathed in, move person into fresh air. If not breathing, give artificial respiration. Consult a physician. In case of skin contact Wash off with soap and plenty of water. Consult a physician. In case of eye contact Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician. If swallowed Never give anything by mouth to an unconscious person. Rinse mouth with water. Consult a physician.

  • Fire-fighting measures: Suitable extinguishing media Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide. Wear self-contained breathing apparatus for firefighting if necessary.

  • Accidental release measures: Use personal protective equipment. Avoid dust formation. Avoid breathing vapours, mist or gas. Ensure adequate ventilation. Evacuate personnel to safe areas. Avoid breathing dust. For personal protection see section 8. Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Discharge into the environment must be avoided. Pick up and arrange disposal. Sweep up and shovel. Keep in suitable, closed containers for disposal.

  • Handling and storage: Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Avoid exposure - obtain special instructions before use.Provide appropriate exhaust ventilation at places where dust is formed. For precautions see section 2.2. Store in cool place. Keep container tightly closed in a dry and well-ventilated place.

  • Exposure controls/personal protection:Occupational Exposure limit valuesBiological limit values Handle in accordance with good industrial hygiene and safety practice. Wash hands before breaks and at the end of workday. Eye/face protection Safety glasses with side-shields conforming to EN166. Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU). Skin protection Wear impervious clothing. The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace. Handle with gloves. Gloves must be inspected prior to use. Use proper glove removal technique(without touching glove's outer surface) to avoid skin contact with this product. Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices. Wash and dry hands. The selected protective gloves have to satisfy the specifications of EU Directive 89/686/EEC and the standard EN 374 derived from it. Respiratory protection Wear dust mask when handling large quantities. Thermal hazards

Supplier and reference price

  • Manufacture/Brand
  • Product Description
  • Packaging
  • Price
  • Delivery
  • Purchase
  • Manufacture/Brand:Usbiological
  • Product Description:Picolinal
  • Packaging:5g
  • Price:$ 305
  • Delivery:In stock
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  • Manufacture/Brand:TRC
  • Product Description:Picolinal
  • Packaging:25g
  • Price:$ 85
  • Delivery:In stock
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  • Manufacture/Brand:TCI Chemical
  • Product Description:2-Pyridinecarboxaldehyde >98.0%(GC)
  • Packaging:500g
  • Price:$ 558
  • Delivery:In stock
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  • Manufacture/Brand:TCI Chemical
  • Product Description:2-Pyridinecarboxaldehyde >98.0%(GC)
  • Packaging:100g
  • Price:$ 194
  • Delivery:In stock
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  • Manufacture/Brand:TCI Chemical
  • Product Description:2-Pyridinecarboxaldehyde >98.0%(GC)
  • Packaging:25g
  • Price:$ 70
  • Delivery:In stock
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  • Manufacture/Brand:SynQuest Laboratories
  • Product Description:Pyridine-2-carboxaldehyde 97%
  • Packaging:10 g
  • Price:$ 16
  • Delivery:In stock
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  • Manufacture/Brand:Sigma-Aldrich
  • Product Description:2-Pyridinecarbaldehyde 2-Pyridinecarbaldehyde for synthesis. CAS No. 1121-60-4, EC Number 214-333-6.
  • Packaging:8074700250
  • Price:$ 255
  • Delivery:In stock
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  • Manufacture/Brand:Sigma-Aldrich
  • Product Description:2-Pyridinecarboxaldehyde 99%
  • Packaging:500g
  • Price:$ 235
  • Delivery:In stock
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  • Manufacture/Brand:Sigma-Aldrich
  • Product Description:2-Pyridinecarboxaldehyde 99%
  • Packaging:100g
  • Price:$ 70.1
  • Delivery:In stock
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  • Manufacture/Brand:Sigma-Aldrich
  • Product Description:2-Pyridinecarbaldehyde 2-Pyridinecarbaldehyde for synthesis. CAS No. 1121-60-4, EC Number 214-333-6.
  • Packaging:8074700050
  • Price:$ 59.9
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Relevant articles and documentsAll total 134 Articles be found

Solution Dynamics of Hybrid Anderson-Evans Polyoxometalates

Salazar Marcano, David E.,Lentink, Sarah,Moussawi, Mhamad A.,Parac-Vogt, Tatjana N.

, p. 10215 - 10226 (2021)

Understanding the stability and speciation of metal-oxo clusters in solution is essential for many of their applications in different areas. In particular, hybrid organic-inorganic polyoxometalates (HPOMs) have been attracting increasing attention as they combine the complementary properties of organic ligands and metal-oxygen nanoclusters. Nevertheless, the speciation and solution behavior of HPOMs have been scarcely investigated. Hence, in this work, a series of HPOMs based on the archetypical Anderson-Evans structure, δ-[MnMo6O18{(OCH2)3C-R}2]3-, with different functional groups (R = -NH2, -CH3, -NHCOCH2Cl, -NCH(2-C5H4N) {pyridine; -Pyr}, and -NHCOC9H15N2OS {biotin; -Biot}) and countercations (tetrabutylammonium {TBA}, Li, Na, and K) were synthesized, and their solution behavior was studied in detail. In aqueous solutions, decomposition of HPOMs into the free organic ligand, [MoO4]2-, and free Mn3+ was observed over time and was shown to be highly dependent on the pH, temperature, and nature of the ligand functional group but largely independent of ionic strength or the nature of the countercation. Furthermore, hydrolysis of the amide and imine bonds often present in postfunctionalized HPOMs was also observed. Hence, HPOMs were shown to exhibit highly dynamic behavior in solution, which needs to be carefully considered when designing HPOMs, particularly for biological applications.

-

Abramovitch et al.

, p. 693 (1974)

-

-

Papadopoulos et al.

, p. 615 (1966)

-

In situ formation of steroidal supramolecular gels designed for drug release

Bunzen, Hana,Kolehmainen, Erkki

, p. 3745 - 3759 (2013)

In this work, a steroidal gelator containing an imine bond was synthesized, and its gelation behavior as well as a sensitivity of its gels towards acids was investigated. It was shown that the gels were acid-responsive, and that the gelator molecules could be prepared either by a conventional synthesis or directly in situ during the gel forming process. The gels prepared by both methods were studied and it was found that they had very similar macro- and microscopic properties. Furthermore, the possibility to use the gels as carriers for aromatic drugs such as 5-chloro-8-hydroxyquinoline, pyrazinecarboxamide, and antipyrine was investigated and the prepared two-component gels were studied with regard to their potential applications in drug delivery, particularly in a pH-controlled drug release.

-

Newkome et al.

, p. 410 (1974)

-

-

Mamaev,Gracheva

, (1971)

-

Copper-catalyzed selective oxygenation of methyl and benzyl substituents in pyridine with O2

Abe, Tsukasa,Tanaka, Shinji,Ogawa, Atsuko,Tamura, Masanori,Sato, Kazuhiko,Itoh, Shinobu

, p. 348 - 350 (2017)

A selective oxygenation of picolines and their derivatives has been achieved by usingasimple copper salt as a catalyst and molecular oxygen as an oxidant, where the α-position of the alkyl substituent is selectively oxidized to give the corresponding aldehydes or ketones. Addition of a catalytic amount of water enhances the catalytic activity, which could be attributed to the role of the proton donor to activate the substrates.

MECHANISM OF THE CATALYTIC OXIDATION OF NITROGEN-CONTAINING METHYL-SUBSTITUTED HETEROCYCLES TO HETARYL ALDEHYDES

Leitis, L. Ya.,Skolmeistere, R. A.,Shimanskaya, M. V.

, p. 52 - 55 (1987)

An interrelationship between the electronic structure of methyl derivatives of nitrogen-containing hetrocyclic compounds and the character of the interaction with the catalyst, the mechanism of heterogeneous-catalytic oxidation, and the selectivity of the process was established.

-

Lejtis,Simanskaja

, (1969)

-

THE ONE-POT CONVERSION OF CARBOXYLIC ACIDS TO ALDEHYDES VIA ACTIVATED SILYL CARBOXYLATES.

Corriu, R. J. P.,Lanneau, G. F.,Perrot, M.

, p. 3941 - 3944 (1987)

The transformation of acids into aldehydes in a one-pot process is performed through the thermal decomposition of pentacoordinated silicon species.

Improving the reactivity of hydrazine-bearing MRI probes for: In vivo imaging of lung fibrogenesis

Akam, Eman A.,Abston, Eric,Rotile, Nicholas J.,Slattery, Hannah R.,Zhou, Iris Y.,Lanuti, Michael,Caravan, Peter

, p. 224 - 231 (2020)

Pulmonary fibrosis (PF) is the pathologic accumulation of extracellular matrix components in lung tissue that result in scarring following chronic lung injury. PF is typically diagnosed by high resolution computed tomography (HRCT) and/or invasive biopsy. However, HRCT cannot distinguish old injury from active fibrogenesis. We previously demonstrated that allysine residues on oxidized collagen represent an abundant target during lung fibrogenesis, and that magnetic resonance imaging (MRI) with a small-molecule, gadolinium-containing probe, Gd-Hyd, could specifically detect and stage fibrogenesis in a mouse model. In this work, we present an improved probe, Gd-CHyd, featuring an N,N-dialkyl hydrazine which has an order of magnitude both greater reactivity and affinity for aldehydes. In a paired study in mice with bleomycin induced lung injury we show that the improved reactivity and affinity of Gd-CHyd results in significantly higher lung-to-liver contrast, e.g. 77% higher at 45 min post injection, and slower lung clearance than Gd-Hyd. Gd-CHyd enhanced MRI is >60-fold higher in bleomycin injured mouse lungs compared to uninjured mice. Collectively, our data indicate that enhancing hydrazine reactivity and affinity towards allysine is an effective strategy to significantly improve molecular MRI probes for lung fibrogenesis.

Synthesis of pyrrolo[1,2-: A] quinoxalines via copper or iron-catalyzed aerobic oxidative carboamination of sp3C-H bonds

Dai, Chenshu,Deng, Siqi,Zhu, Qiuhua,Tang, Xiaodong

, p. 44132 - 44135 (2017)

An aerobic oxidative carboamination of sp3C-H bonds with 2-(1H-pyrrol-1-yl)anilines has been developed. The oxidative carboamination processes utilized simple and readily available starting materials to produce pyrrolo[1,2-a]quinoxalines in good to moderate yields. The transformations also featured inexpensive metal catalysts (copper or iron) and a green oxidant (O2).

The Synergy Effect in Tio2 Supported Bi-Mo Catalysts for Facile and Environmentally-Friendly Synthesis of Pyridylaldehydes from Oxidation of Picolines

Dai, Liyan,Jie, Yu,Zhylko, Viachaslau

, p. 181 - 186 (2020)

Abstract: The oxidation of picolines to pyridlaldehydes was studied over bismuth molybdate catalysts supported on TiO2. The research results showed that α-Bi2Mo3O12 was superior to β-Bi2Mo2O9 and γ-Bi2MoO6 in terms of reactivity. Further doping MoO3 to α-Bi2Mo3O12/TiO2 gave rise to increased catalytic performance, which was due to the synergy effect of α-Bi2Mo3O12 and MoO3. The effect was on one hand manifested in the intimate relationship between α-Bi2Mo3O12 and MoO3 in stabilizing the crystallographic structure of catalysts and thereafter maintaining the surface area of the catalyst, as indicated by the BET surface area and XRD analysis. Moreover, NH3-TPD analysis demonstrated the effect in modifying the surface acidity of the catalysts, and thus facilitating the substrate adsorption as the picolines are alkaline substances. Additionally, the effect between α-Bi2Mo3O12 and MoO3 rendered the modification of the electronic properties and thereafter the oxygen desorption properties and reducible properties of the catalysts, as evidenced in the H2-TPR and O2-TPD analysis.

Convenient and eco-friendly method for the conversion of benzylic alcohols into aldehydes, ketones, and carboxylic acids using NaOCl without any additives in 1,2-dimethoxyethane

Fukuda, Naohiro,Kajiwara, Takeshi,Katou, Tomoaki,Majima, Keisuke,Ikemoto, Tomomi

, p. 1438 - 1442 (2013)

Oxidation of benzylic alcohols to aldehydes, ketones, and carboxylic acids using NaOCl in 1,2-dimethoxyethane without any additives has been developed. 4-Methylbenzyl alcohol and diphenyl methanol were converted into the corresponding aldehyde and ketone in 97% and 92% yield, respectively. Furthermore, 4-nitrobenzyl alcohol was directly converted into the corresponding carboxylic acid in 99% yield. Georg Thieme Verlag Stuttgart · New York.

An Optical Resolution of Pyridyl and Bipyridylethanols and A Facile Preparation of Optically Pure Oligopyridines

Uenishi, Jun'ichi,Nishiwaki, Kenji,Hata, Shinichiro,Nakamura, Kaoru

, p. 7973 - 7976 (1994)

A kinetic resolution of racemic pyridyl and bipyridylethanols was performed by Candida antarctica lipase with vinyl acetate in diisopropyl ether, in which (R)-alcohol was acetylated stereoselectively, and both the acetate 2 and the remaining (S)-alcohol 1 were obtained with high enantiomeric excesses. (S)-Oligopyridylethanols, 7 and 8 were prepared by a coupling reaction of (S)-1b and (S)-1e with ethyl bipyridyl sulfoxide.

Orthogonal Stimuli Trigger Self-Assembly and Phase Transfer of FeII4L4 Cages and Cargoes

McConnell, Anna J.,Haynes, Cally J. E.,Grommet, Angela B.,Aitchison, Catherine M.,Guilleme, Julia,Mikutis, Sigitas,Nitschke, Jonathan R.

, p. 16952 - 16956 (2018)

Two differently protected aldehydes, A and B, were demonstrated to deprotect selectively through the application of light and heat, respectively. In the presence of iron(II) and a triamine, two distinct FeII4L4 cages, 1 and 2, were thus observed to form from the deprotected A and B, respectively. The alkyl tails of B and 2 render them preferentially soluble in cyclopentane, whereas A and 1 remain in acetonitrile. The stimulus applied (either light or heat) thus determines the outcome of self-assembly and dictates whether the cage and its ferrocene cargo remain in acetonitrile, or transport into cyclopentane. Cage self-assembly and cargo transport between phases can in this fashion be programmed using orthogonal stimuli.

Synthesis of new Zn (II) complexes for photo decomposition of organic dye pollutants, industrial wastewater and photo-oxidation of methyl arenes under visible-light

Ahemed, Jakeer,Bhongiri, Yadagiri,Chetti, Prabhakar,Gade, Ramesh,Kore, Ranjith,Pasha, Jakeer,Pola, Someshwar,Rao D, Venkateshwar

, (2021/07/28)

Synthesis of new Schiff's base Zn-complexes for photo-oxidation of methyl arenes and xylenes are reported under visible light irradiation conditions. All the synthesized new ligands and Zn-complexes are thoroughly characterized with various spectral analyses and confirmed as 1:1 ratio of Zn and ligand with distorted octahedral structure. The bandgap energies of the ligands are higher than its Zn-complexes. These synthesized new Zn(II) complexes are used for the photo-fragmentation of organic dye pollutants, photodegradation of food industrial wastewater and oxidation of methyl arenes which are converted into its respective aldehydes with moderate yields under visible light irradiation. The photooxidation reaction dependency on the intensity of the visible light was also studied. With the increase in the dosage of photocatalyst, the methyl groups are oxidized to get aldehydes and mono acid products, which are also identified from LC-MS data. Finally, [Zn(PPMHT)Cl] is with better efficiency than [Zn(PTHMT)Cl] and [Zn(MIMHPT)Cl] for oxidation of methyl arenes is reported under visible-light-driven conditions.

Oxidation/ MCR domino protocol for direct transformation of methyl benzene, alcohol, and nitro compounds to the corresponding tetrazole using a three-functional redox catalytic system bearing TEMPO/Co(III)-porphyrin/ Ni(II) complex

Mahmoudi, Boshra,Rostami, Amin,Kazemnejadi, Milad,Hamah-Ameen, Baram Ahmed

, (2020/12/21)

A redox catalytic system for oxidation-reduction reactions and the domino preparation of tetrazole compounds from nitro and alcohol precursors was designed, prepared and characterized by UV–vis, GPC, TGA, XRD, EDX, XPS, VSM, FE-SEM, TEM, DLS, BET, NMR, and ICP analyses. The catalyst was prepared via several successive steps by demetalation of chlorophyll b, copolymerization with acrylated TEMPO monomers, complexation with Ni and Co metals (In two different steps), then immobilized on magnetic nanoparticles. The presence of three functional groups including TEMPO, coordinated cobalt, and coordinated nickel in the catalyst, allowed the oxidation of various types of alcohols, alkyl benzenes as well as the reduction of nitro compounds by a single catalyst. All reactions yielded up to 97 % selectivity for oxidation and reduction reactions. Next, the ability of the catalyst to successfully convert alcohol, methyl benzenes and nitro to their corresponding tetrazoles was studied.

Iodine-imine Synergistic Promoted Povarov-Type Multicomponent Reaction for the Synthesis of 2,2′-Biquinolines and Their Application to a Copper/Ligand Catalytic System

Hu, Qi-Qi,Gao, Yan-Ting,Sun, Jia-Chen,Gao, Jing-Jing,Mu, Hong-Xiao,Li, Yi-Ming,Zheng, Ya-Nan,Yang, Kai-Rui,Zhu, Yan-Ping

supporting information, p. 9000 - 9005 (2021/11/24)

An efficient iodine-imine synergistic promoted Povarov-type multicomponent reaction was reported for the synthesis of a practical 2,2′-biquinoline scaffold. The tandem annulation has reconciled iodination, Kornblum oxidation, and Povarov aromatization, where the methyl group of the methyl azaarenes represents uniquely reactive input in the Povarov reaction. This method has broad substrate scope and mild conditions. Furthermore, these 2,2′-biquinoline derivatives had been directly used as bidentate ligands in metal-catalyzed reactions.

A novel selective oxidative cleavage of C–C bond mediated by black nickel oxide in the presence of molecular oxygen

Meng, Lingwu,Li, Wei,Guo, Pengfei,Wang, Shun,Tong, Xinli

, (2021/04/02)

A selective aerobic oxidative cleavage of C–C bond is developed with black nickel oxide (NiOx) as the catalyst. For the oxidation of 1-phenyl-1, 2-ethanediol, a 97.5% conversion in 96.7% selectivity of benzaldehyde is obtained under 0.3 MPa of O2 at 140 °C for 3 h. The relationship between the catalytic performance of NiOx and structure is discussed. It is concluded that the existence of Ni3+ should be crucial to the activity of catalyst. Moreover, the recycling experiments showed that the catalyst can retain a high activity even after being reused for five times.

Process route upstream and downstream products

Process route

Pyridine-2-aldehyde acetal
121529-94-0

Pyridine-2-aldehyde acetal

pyridine-2-carbaldehyde
1121-60-4

pyridine-2-carbaldehyde

butyl pyridine-2-carboxylate
5340-88-5

butyl pyridine-2-carboxylate

2-Butoxymethyl-pyridine
89290-78-8

2-Butoxymethyl-pyridine

Conditions
Conditions Yield
aluminum oxide; at 200 ℃; Product distribution; other temperatures, other catalyst;
2-Hydroxymethylpyridine
586-98-1

2-Hydroxymethylpyridine

diethylazodicarboxylate
1972-28-7,218603-74-8

diethylazodicarboxylate

pyridine-2-carbaldehyde
1121-60-4

pyridine-2-carbaldehyde

diethyl hydrazodicarboxylate
4114-28-7

diethyl hydrazodicarboxylate

Conditions
Conditions Yield
With zinc dibromide; In toluene; for 2.5h; Reflux;
70%
α-picoline
109-06-8

α-picoline

2,2'-diphenyl-[3,3']biindolylidene 1,1'-dioxide
2196-95-4,17213-48-8

2,2'-diphenyl-[3,3']biindolylidene 1,1'-dioxide

pyridine
110-86-1

pyridine

pyridine-2-carbaldehyde
1121-60-4

pyridine-2-carbaldehyde

2-Picolinic acid
98-98-6

2-Picolinic acid

1,1'-dihydroxy-2,2'-diphenyl-3,3'-biindole
5169-64-2

1,1'-dihydroxy-2,2'-diphenyl-3,3'-biindole

2,2'-diphenyl-1H,1'H-3,3'-biindole
2415-33-0

2,2'-diphenyl-1H,1'H-3,3'-biindole

Conditions
Conditions Yield
at 140 ℃; for 14h; Product distribution;
50%
20%
20%
5%
42%
pyridine-2-carbaldehyde
1121-60-4

pyridine-2-carbaldehyde

tryptamine
61-54-1

tryptamine

Conditions
Conditions Yield
74 mg (90%)
pyridine-2-carbaldehyde
1121-60-4

pyridine-2-carbaldehyde

4-amino-1-benzylpiperidine
50541-93-0

4-amino-1-benzylpiperidine

Conditions
Conditions Yield
79 mg (85%)
2-iodopyridine
5029-67-4

2-iodopyridine

carbon dioxide
124-38-9,18923-20-1

carbon dioxide

pyridine
110-86-1

pyridine

pyridine-2-carbaldehyde
1121-60-4

pyridine-2-carbaldehyde

[2,2]bipyridinyl
366-18-7

[2,2]bipyridinyl

Conditions
Conditions Yield
With palladium on activated charcoal; 1,8-diazabicyclo[5.4.0]undec-7-ene; In acetonitrile; at 80 ℃; for 20h; Autoclave;
29%
33%
20%
pyridine-2-carbaldehyde
1121-60-4

pyridine-2-carbaldehyde

rac-methylbenzylamine
618-36-0

rac-methylbenzylamine

Conditions
Conditions Yield
52 mg (74%)
pyridine-2-carboxylic acid amide
1452-77-3

pyridine-2-carboxylic acid amide

pyridine-2-carbaldehyde
1121-60-4

pyridine-2-carbaldehyde

2-Hydroxymethylpyridine
586-98-1

2-Hydroxymethylpyridine

Conditions
Conditions Yield
With samarium diiodide; In tetrahydrofuran; for 0.583333h; Ambient temperature;
62%
24%
2-nitrooxymethylpyridine

2-nitrooxymethylpyridine

pyridine-2-carbaldehyde
1121-60-4

pyridine-2-carbaldehyde

2-Hydroxymethylpyridine
586-98-1

2-Hydroxymethylpyridine

Conditions
Conditions Yield
With sodium methylate; In methanol; for 3h; Yield given. Yields of byproduct given. Title compound not separated from byproducts; Ambient temperature;
(CH<sub>3</sub>CNO)2(CH<sub>3</sub>CNOH)2Co(C<sub>5</sub>H<sub>5</sub>N)(OOCH<sub>2</sub>C<sub>5</sub>H<sub>4</sub>N)

(CH3CNO)2(CH3CNOH)2Co(C5H5N)(OOCH2C5H4N)

pyridine-2-carbaldehyde
1121-60-4

pyridine-2-carbaldehyde

2-Hydroxymethylpyridine
586-98-1

2-Hydroxymethylpyridine

Conditions
Conditions Yield
In methanol; decomposition of the complex by refluxing in methanol under N2 for 6-8 h; evapn. of the solvent, extn. of the organic compounds with ether, gas chromatography;
14%
86%

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