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Cas Database

110-87-2

110-87-2

Identification

  • Product Name:Dihydropyran

  • CAS Number: 110-87-2

  • EINECS:203-810-4

  • Molecular Weight:84.1179

  • Molecular Formula: C5H8O

  • HS Code:29329995

  • Mol File:110-87-2.mol

Synonyms:1,2-Pyran,3,4-dihydro- (3CI);2-Pyran, 3,4-dihydro- (4CI);Pyran, dihydro- (7CI);2,3-Dihydro-4H-pyran;2,3-Dihydro-g-pyran;2H-3,4-Dihydropyran;3,4-Dihydro-2H-pyran;5,6-Dihydro-4H-pyran;

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Safety information and MSDS view more

  • Pictogram(s):FlammableF,IrritantXi

  • Hazard Codes:F,Xi

  • Signal Word:Danger

  • Hazard Statement:H225 Highly flammable liquid and vapourH315 Causes skin irritation H317 May cause an allergic skin reaction H319 Causes serious eye irritation H402 Harmful to aquatic life H412 Harmful 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. Excerpt from ERG Guide 127 [Flammable Liquids (Water-Miscible)]: Inhalation or contact with material may irritate or burn skin and eyes. Fire may produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control may cause pollution. (ERG, 2016)

  • Fire-fighting measures: Suitable extinguishing media Excerpt from ERG Guide 127 [Flammable Liquids (Water-Miscible)]: CAUTION: All these products have a very low flash point: Use of water spray when fighting fire may be inefficient. CAUTION: For fire involving UN1170, UN1987 or UN3475, alcohol-resistant foam should be used. SMALL FIRE: Dry chemical, CO2, water spray or alcohol-resistant foam. LARGE FIRE: Water spray, fog or alcohol-resistant foam. Do not use straight streams. Move containers from fire area if you can do it without risk. FIRE INVOLVING TANKS OR CAR/TRAILER LOADS: Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks engulfed in fire. For massive fire, use unmanned hose holders or monitor nozzles; if this is impossible, withdraw from area and let fire burn. (ERG, 2016) Excerpt from ERG Guide 127 [Flammable Liquids (Water-Miscible)]: HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water. (ERG, 2016) 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
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  • Purchase
  • Manufacture/Brand:Usbiological
  • Product Description:3,4-Dihydro-2H-pyran 98+%
  • Packaging:18L
  • Price:$ 1062
  • Delivery:In stock
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  • Manufacture/Brand:TRC
  • Product Description:2,3-Dihydropyran
  • Packaging:25g
  • Price:$ 50
  • Delivery:In stock
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  • Manufacture/Brand:TCI Chemical
  • Product Description:3,4-Dihydro-2H-pyran >97.0%(GC)
  • Packaging:100mL
  • Price:$ 26
  • Delivery:In stock
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  • Manufacture/Brand:TCI Chemical
  • Product Description:3,4-Dihydro-2H-pyran >97.0%(GC)
  • Packaging:25mL
  • Price:$ 14
  • Delivery:In stock
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  • Manufacture/Brand:TCI Chemical
  • Product Description:3,4-Dihydro-2H-pyran >97.0%(GC)
  • Packaging:500mL
  • Price:$ 91
  • Delivery:In stock
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  • Manufacture/Brand:SynQuest Laboratories
  • Product Description:3,4-Dihydro-2H-pyran
  • Packaging:100 g
  • Price:$ 56
  • Delivery:In stock
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  • Manufacture/Brand:SynQuest Laboratories
  • Product Description:3,4-Dihydro-2H-pyran
  • Packaging:25 g
  • Price:$ 16
  • Delivery:In stock
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  • Manufacture/Brand:Sigma-Aldrich
  • Product Description:3,4-Dihydro-2H-pyran 97%
  • Packaging:100ml
  • Price:$ 29.4
  • Delivery:In stock
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  • Manufacture/Brand:Sigma-Aldrich
  • Product Description:3,4-Dihydro-2H-pyran for synthesis
  • Packaging:100 mL
  • Price:$ 29.04
  • Delivery:In stock
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  • Manufacture/Brand:Sigma-Aldrich
  • Product Description:3,4-Dihydro-2H-pyran for synthesis. CAS 110-87-2, pH 7 (5 g/l, H O, 20 °C)., for synthesis
  • Packaging:8029710100
  • Price:$ 30.3
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Relevant articles and documentsAll total 36 Articles be found

Effect of pretreatment conditions on acidity and dehydration activity of CeO2-MeOx catalysts

Cronauer, Donald C.,Góra-Marek, Kinga,Garcia, Richard,Gnanamani, Muthu Kumaran,Jacobs, Gary,Kropf, A. Jeremy,Marshall, Christopher L.

, (2020/07/10)

A series of MeOx-modified CeO2 (CeO2-MnOx, CeO2-ZnO, CeO2-MgO, CeO2-CaO, and CeO2-Na2O) catalysts were prepared by the impregnation of CeO2 with corresponding metal nitrates. Acidity and oxidation state of cerium were investigated on both oxidized and reduced catalysts by employing Fourier Transform Infrared spectroscopy (FTIR) on adsorbed pyridine and in situ H2-Temperature Programmed Reduction/X-ray Absorption Spectroscopy (H2-TPR/XAS) techniques, respectively. Metal oxide addition tended to alter both type and number of acid sites on ceria. EXAFS data showed a significant difference in NCe-O between unmodified and CeO2-MeOx, suggesting that added MeOx interferes with vacancy formation on ceria during reduction. In comparison with air-pretreated samples, H2-pretreated ones under similar conversion of 1,5 pentanediol exhibited a higher selectivity towards linear alcohols. Alcohol conversion found to correlate with total acidity (i.e., Br?nsted and Lewis). CeO2 benefited from the addition of alkali (Na) or alkaline earth metals (Mg, Ca) by producing unsaturated alcohols.

Manganese-Catalyzed Desaturation of N-Acyl Amines and Ethers

Li, Gang,Kates, Patrick A.,Dilger, Andrew K.,Cheng, Peter T.,Ewing, William R.,Groves, John T.

, p. 9513 - 9517 (2019/10/14)

Enamines and enol ethers are versatile synthons for chemical synthesis. While several methods have been developed to access such molecules, prefunctionalized starting materials are usually required, and direct desaturation methods remain rare. Herein, we report direct desaturation reactions of N-protected cyclic amines and cyclic ethers using a mild I(III) oxidant, PhI(OAc)2, and an electron-deficient manganese pentafluorophenylporphyrin catalyst, Mn(TPFPP)Cl. This system displays high efficiency for α,β-desaturation of various cyclic amines and ethers. Mechanistic probes suggest that the desaturation reaction occurs via an initial α-C-H hydroxylation pathway, which serves to protect the product from overoxidation.

Production of 1,5-pentanediol via upgrading of tetrahydrofurfuryl alcohol

-

Page/Page column 12; 13, (2018/10/11)

A method of making 1,5-pentanediol from tetrahydrofurfural alcohol. The method includes the steps of dehydrating tetrahydrofurfural alcohol (THFA) to dihydropyran (DHP); hydrating at least a portion of the DHP to 2-hydroxy-tetrahydropyran (2-HY-THP) in the presence of a solid acid catalyst; and hydrogenating at least a portion of the 2-HY-THP to 1,5-pentanediol. The method can be conducted entirely in the absence of noble metal catalysts.

The kinetics and mechanism of the homogeneous, unimolecular gas-phase elimination of 2-(4-substituted-phenoxy)tetrahydro-2H-pyranes

Alvarez-Aular, Alvaro,Cartaya, Loriett,Maldonado, Alexis,Coll, David Santiago,Chuchani, Gabriel

, (2018/02/27)

The gas-phase elimination kinetics of tetrahydropyranyl phenoxy ethers: 2-phenoxytetrahydro-2H-pyran, 2-(4-methoxyphenoxy)tetrahydro-2H-pyran, and 2-(4-tert-butylphenoxy)tetrahydro-2H-pyran were determined in a static system, with the vessels deactivated with allyl bromide, and in the presence of the free radical inhibitor toluene. The working temperature and pressure were 330 to 390°C and 25 to 89?Torr, respectively. The reactions yielded DHP and the corresponding 4-substituted phenol. The eliminations are homogeneous, unimolecular, and satisfy a first-order rate law. The Arrhenius equations for decompositions were found as follows: 2-phenoxytetrahydro-2H-pyran log k1 (s?1)?=?(14.18?±?0.21)???(211.6?±?0.4)?kJ?mol?1 (2.303 RT)?1 2-(4-methoxyphenoxy)tetrahydro-2H-pyran log k1 (s?1)?=?(14.11?±?0.18)???(203.6?±?0.3)?kJ?mol?1 (2.303 RT)?1 2-(4-tert-butylphenoxy)tetrahydro-2H-pyran log k1 (s?1)?=?(14.08?±?0.08)???(205.9?±?1.0)?kJ?mol?1 (2.303 RT)?1. The analysis of kinetic and thermodynamic parameters for thermal elimination of 2-(4-substituted-phenoxy)tetrahydro-2H-pyranes suggests that the reaction proceeds via 4-member cyclic transition state. The results obtained confirm a slight increase of rate constant with increasing electron donating ability groups in the phenoxy ring. The pyran hydrogen abstraction by the oxygen of the phenoxy group appears to be the determinant factor in the reaction rate.

PRODUCTION OF 1,5-PENTANEDIOL VIA UPGRADING OF TETRAHYDROFUFURYL ALCOHOL

-

Paragraph 0062; 0073, (2017/09/05)

A method of making 1,5-pentanediol from tetrahydrofurfural alcohol. The method includes the steps of dehydrating tetrahydrofurfural alcohol (THFA) to dihydropyran (DHP); hydrating at least a portion of the DHP to 2-hydroxy-tetrahydropyran (2-HY-THP) in the absence of homogeneous acid; and hydrogenating at least a portion of the 2-HY-THP to 1,5-pentanediol. The method can be conducted entirely in the absence of noble metal catalysts.

Process route upstream and downstream products

Process route

1 ,5-pentanediol
111-29-5

1 ,5-pentanediol

3,4-dihydro-2<i>H</i>-pyran
110-87-2

3,4-dihydro-2H-pyran

3,4,5,6-tetrahydro-2H-pyran-2-one
542-28-9,26354-94-9

3,4,5,6-tetrahydro-2H-pyran-2-one

propan-1-ol
71-23-8

propan-1-ol

2-Methylcyclopentanone
1120-72-5

2-Methylcyclopentanone

n-Pent-4-enyl alcohol
821-09-0

n-Pent-4-enyl alcohol

ethanol
64-17-5

ethanol

pentan-1-ol
71-41-0

pentan-1-ol

2,2-dimethoxy-3-octanol
19841-72-6

2,2-dimethoxy-3-octanol

4-pentenyl propionate
30563-30-5

4-pentenyl propionate

4-pentenyl pentanoate
30563-32-7

4-pentenyl pentanoate

Cyclopentanol
96-41-3

Cyclopentanol

cyclohexyl cyclohexanecarboxylate
15840-96-7

cyclohexyl cyclohexanecarboxylate

cyclopentanone
120-92-3

cyclopentanone

cyclohexylmethyl alcohol
100-49-2

cyclohexylmethyl alcohol

Conditions
Conditions Yield
With air pretreated CeO2; at 350 ℃; under 760.051 Torr; Flow reactor;
1 ,5-pentanediol
111-29-5

1 ,5-pentanediol

3,4-dihydro-2<i>H</i>-pyran
110-87-2

3,4-dihydro-2H-pyran

3,4,5,6-tetrahydro-2H-pyran-2-one
542-28-9,26354-94-9

3,4,5,6-tetrahydro-2H-pyran-2-one

2-Methylcyclopentanone
1120-72-5

2-Methylcyclopentanone

n-Pent-4-enyl alcohol
821-09-0

n-Pent-4-enyl alcohol

ethanol
64-17-5

ethanol

pentan-1-ol
71-41-0

pentan-1-ol

2,2-dimethoxy-3-octanol
19841-72-6

2,2-dimethoxy-3-octanol

4-pentenyl propionate
30563-30-5

4-pentenyl propionate

4-pentenyl pentanoate
30563-32-7

4-pentenyl pentanoate

Cyclopentanol
96-41-3

Cyclopentanol

cyclohexyl cyclohexanecarboxylate
15840-96-7

cyclohexyl cyclohexanecarboxylate

cyclopentanone
120-92-3

cyclopentanone

cyclohexylmethyl alcohol
100-49-2

cyclohexylmethyl alcohol

Conditions
Conditions Yield
With H2 pretreated ZnO-modified CeO2; at 350 ℃; under 760.051 Torr; Reagent/catalyst; Flow reactor;
1 ,5-pentanediol
111-29-5

1 ,5-pentanediol

3,4-dihydro-2<i>H</i>-pyran
110-87-2

3,4-dihydro-2H-pyran

3,4,5,6-tetrahydro-2H-pyran-2-one
542-28-9,26354-94-9

3,4,5,6-tetrahydro-2H-pyran-2-one

2-Methylcyclopentanone
1120-72-5

2-Methylcyclopentanone

n-Pent-4-enyl alcohol
821-09-0

n-Pent-4-enyl alcohol

ethanol
64-17-5

ethanol

pentan-1-ol
71-41-0

pentan-1-ol

2,2-dimethoxy-3-octanol
19841-72-6

2,2-dimethoxy-3-octanol

4-pentenyl propionate
30563-30-5

4-pentenyl propionate

4-pentenyl pentanoate
30563-32-7

4-pentenyl pentanoate

cyclohexyl cyclohexanecarboxylate
15840-96-7

cyclohexyl cyclohexanecarboxylate

cyclopentanone
120-92-3

cyclopentanone

cyclohexylmethyl alcohol
100-49-2

cyclohexylmethyl alcohol

Conditions
Conditions Yield
With H2 pretreated MnOx-modified CeO2; at 350 ℃; under 760.051 Torr; Reagent/catalyst; Flow reactor;
1 ,5-pentanediol
111-29-5

1 ,5-pentanediol

3,4-dihydro-2<i>H</i>-pyran
110-87-2

3,4-dihydro-2H-pyran

2-Methylcyclopentanone
1120-72-5

2-Methylcyclopentanone

n-Pent-4-enyl alcohol
821-09-0

n-Pent-4-enyl alcohol

ethanol
64-17-5

ethanol

pentan-1-ol
71-41-0

pentan-1-ol

2,2-dimethoxy-3-octanol
19841-72-6

2,2-dimethoxy-3-octanol

4-pentenyl propionate
30563-30-5

4-pentenyl propionate

4-pentenyl pentanoate
30563-32-7

4-pentenyl pentanoate

cyclohexyl cyclohexanecarboxylate
15840-96-7

cyclohexyl cyclohexanecarboxylate

cyclopentanone
120-92-3

cyclopentanone

cyclohexylmethyl alcohol
100-49-2

cyclohexylmethyl alcohol

Conditions
Conditions Yield
With H2 pretreated Na2O-modified CeO2; at 350 ℃; under 760.051 Torr; Reagent/catalyst; Flow reactor;
3-chlorotetrahydropyran
6581-54-0

3-chlorotetrahydropyran

3,4-dihydro-2<i>H</i>-pyran
110-87-2

3,4-dihydro-2H-pyran

pent-1-yn-5-ol
5390-04-5

pent-1-yn-5-ol

Conditions
Conditions Yield
With ammonia; sodium amide;
5-chloro-3,4-dihydro-2<i>H</i>-pyran
6581-49-3

5-chloro-3,4-dihydro-2H-pyran

3,4-dihydro-2<i>H</i>-pyran
110-87-2

3,4-dihydro-2H-pyran

pent-1-yn-5-ol
5390-04-5

pent-1-yn-5-ol

Conditions
Conditions Yield
3-chlorotetrahydropyran
6581-54-0

3-chlorotetrahydropyran

ammonia
7664-41-7

ammonia

sodium amide

sodium amide

3,4-dihydro-2<i>H</i>-pyran
110-87-2

3,4-dihydro-2H-pyran

pent-1-yn-5-ol
5390-04-5

pent-1-yn-5-ol

Conditions
Conditions Yield
homoalylic alcohol
627-27-0

homoalylic alcohol

carbon monoxide
201230-82-2

carbon monoxide

tetrahydro-2H-2-pyranol
694-54-2

tetrahydro-2H-2-pyranol

3,4-dihydro-2<i>H</i>-pyran
110-87-2

3,4-dihydro-2H-pyran

(E)-but-2-enol
504-61-0,542-72-3

(E)-but-2-enol

2-hydroxy-4-methyltetrahydrofuran
34314-85-7

2-hydroxy-4-methyltetrahydrofuran

butan-1-ol
71-36-3

butan-1-ol

Conditions
Conditions Yield
With dicarbonyl(acetylacotonato)rhodium(I); hydrogen; triphenylphosphine; at 60 ℃; for 1.5h; under 7500.75 Torr; regioselective reaction; Autoclave; Inert atmosphere;
With dicarbonyl(acetylacotonato)rhodium(I); hydrogen; triphenylphosphine; at 60 ℃; for 2.5h; under 10501.1 Torr; regioselective reaction; Autoclave; Inert atmosphere;
2-(2,4,6-Trimethyl-phenoxy)-tetrahydro-pyran
94800-75-6

2-(2,4,6-Trimethyl-phenoxy)-tetrahydro-pyran

3,4-dihydro-2<i>H</i>-pyran
110-87-2

3,4-dihydro-2H-pyran

2-phenoxytetrahydropyran
4203-50-3

2-phenoxytetrahydropyran

Mesitol
527-60-6

Mesitol

Conditions
Conditions Yield
With terephthalonitrile; phenanthrene; In acetonitrile; at 20 ℃; for 10h; Irradiation;
16 % Chromat.
3,4-dihydro-2<i>H</i>-pyran
110-87-2

3,4-dihydro-2H-pyran

4-methyl-6-(2-methyl-1-propyl)-5,6-dihydro-2H-pyran
59848-69-0

4-methyl-6-(2-methyl-1-propyl)-5,6-dihydro-2H-pyran

Conditions
Conditions Yield

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