100-50-5Relevant articles and documents
SELECTIVE HYDROFORMYLATION OF CYCLODIENES TO CYCLOALKENECARBOXALDEHYDES USING CATALYSTS DERIVED DIRECTLY FROM Rh VAPOUR AND CYCLODIENES
Salvadori, Piero,Vitulli, Giovanni,Raffaelli, Andrea,Lazzaroni, Raffaello
, p. 351 - 356 (1983)
Cocondensation of Rh atoms with cyclodienes at liquid nitrogen temperature yields Rh complexes, thermally stable in excess of the ligand, which are good catalysts for the selective hydroformylation of cyclodienes to cycloalkenecarboxaldehydes.
Visible-Light-Driven Photocatalytic Oxidation of Organic Chlorides Using Air and an Inorganic-Ligand Supported Nickel-Catalyst Without Photosensitizers
Yu, Han,Wang, Jingjing,Zhai, Yongyan,Zhang, Mengqi,Ru, Shi,Han, Sheng,Wei, Yongge
, p. 4274 - 4279 (2018)
Engineering photoredox-triggered chemical transformation via visible light has been an emerging area in organic synthesis. However, most of the well-established photocatalysts are based upon either transition metal complexes involved with noble metals and organic ligands or photosensitive organic dyes, the development of pure inorganic molecular photocatalysts that could provide better stability and durability is greatly retarded. Herein we discover that the Anderson polyoxometalate (POM) Na4[NiMo6O18(OH)6] (1), which consists of pure inorganic framework built from a central NiII core supported by six MoVIO6 inorganic scaffold/ligands, can be used as a powerful photocatalyst. Upon irradiation with visible light (>400 nm), the compound can catalyze, in high efficiency, a wide range of reactions, including the oxidative cross-coupling reaction of chlorides with amines, as well as oxidation of chlorides using molecular oxygen, affording various imines, aldehydes, and ketones, respectively in high selectivity and good yields. Owing to the robust inorganic framework, this catalyst exhibits excellent stability during the catalysis and reusability with little loss of the catalytic activity, thus providing an alternative without use of complicated organic ligands and expensive noble metal-based photosensitizers.
Studies on Transition-Metal Oxo and Nitrido Complexes. Part 10. New Oxo-Ruthenium and Oxo-Osmium Pyridine Complexes, and Use of the Former as Catalysts for Oxidation of Alcohols
El-Hendawy, Ahmed M.,Griffith, William P.,Taha, Fatma I.,Moussa, Mahmoud N.
, p. 901 - 906 (1989)
The new complexes trans-(2+), trans-(2+), trans- (M=Ru or Os; X=Cl or Br; py= pyridine) and trans- are reported.Both tans-(2+) and trans- in CH2Cl2 are efficient oxidants for primary alcohols to aldehydes and secondary alcohols to ketones, and function catalytically, with N-methylmorpholine N-oxide (mmo) or n4> as co-oxidants.A simple preparation of trans- and the isolation of , , and OsO2L2(O2C6H10)> (L=pyridine N-oxide) are also reported. Complexes were characterised by Raman, i.r. and (1)H n.m.r.spectroscopy.
Rhodium-Catalyzed C,C-Double Bond Cleavage by Molecular Oxygen
Boennemann, Helmut,Nunez, Washington,Rohe, Dieter M. M.
, p. 177 - 185 (1983)
Acetylacetonatorhodiumolefin systems, allylrhodium complexes, or (Ph3P)3RhCl catalyzed the conversion of alkenes and molecular oxygen to carbonyl compounds via C=C-bond cleavage.For example, 2,3-dimethyl-2-butene was transformed into acetone.Butadiene and isoprene also undergo oxidative C=C-bond cleavage to form acrylaldehyde and related compounds.
Alkene Epoxidations Catalyzed by Iron(III), Manganese(III), and Chromium(III) Porphyrins. Effects of Metal and Porphyrin Substituents on Selectivity and Regiochemistry of Epoxidation
Traylor, Teddy G.,Miksztal, Andrew R.
, p. 7443 - 7448 (1989)
The products of epoxidation of norbornene, cyclohexene, and adamantylideneadamantane with pentafluoroiodobenzene using as catalysts variously substituted tetraphenylporphyrin complexes of chloroiron(III), chloromanganese(III), and chlorochromium(III) have been determined.All catalysts afforded the epoxide from adamantylideneadamantane, suggesting that the metallacycle intermediate, impossible in this case, is not required for epoxidation.The ratios of exo- to endo-epoxynorbornanes obtained from norbornene varied from about 1E3 for electropositively substituted Cr(III) complexes gradually through the Mn(III) and Fe(III) series to a value of about 6 for electronegatively substituted iron(III) porphyrins.Mechanisms ranging from limiting electrophilic addition to limiting electron transfer are proposed to account for these changes.The electronegatively substituted iron porphyrins show a greater tendency toward epoxidation rather than allylic oxidation and show more selectivity for cis-alkenes.
Selective catalytic oxidation of alcohols using hydrogen peroxide
Wynne,Lloyd,Witsil,Mushrush,Stalick
, p. 588 - 592 (2000)
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Garin
, p. 4071 (1969)
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Reduction of Organic Compounds with Rare-Earth Intermetallics Containing Absorbed Hydrogen
Imamoto, Tsuneo,Mita, Takeshi,Yokoyama, Masataka
, p. 5695 - 5699 (1987)
The hydrogenation of organic compounds with rare-earth intermetallic hydrides has been investigated.Alkynes,alkenes,aldehydes,ketones,nitriles,imines, and nitro compounds are hydrogenated in excellent yields with LaNi5H6 or LaNi4.5Al0.5H5 at 0-60 deg C.The present hydrogenation method has the following characteristic features. (1) The intermetallic compounds (alloys) are not poisoned by compounds containing an amino group or a halogen atom. (2) The alloys can be used repeatedly without decrease in activity. (3) The reaction conditions are mild, and selective hydrogenations of some organic functional groups can be achieved.The reaction mechanism of this hydrogenation is briefly discussed in terms of stereochemistry and H/D exchange reactions.
Rhodium complex catalyzed hydroformylation reactions of linear and cyclic mono- and diolefins
Trzeciak, Anna M.,Ziolkowski, Jozef J.
, p. 213 - 216 (1994)
The hydroformylation reactions of cyclopentene, cyclohexene, 4-vinylcyclohexene, cycloheptene and cyclooctene, catalyzed with a Rh(acac)2/P(OPh)3 (I) system at 80 deg C and 10 atm (CO+H2), have been studied.Only cyclopentene and 4-vinylcyclohexene undergo hydroformylation at 1 atm and 40 deg C.The hydroformylation of some cyclic dienes; (1,3- and 1,4-cyclohexadienes, 1,3- and 1,5-cyclooctadienes and 1,3-cyclopentadiene), at 10 atm and 80 deg C, was investigated in two catalytic systems: (I) and Rh(acac) (CO) (PPh3) / PPh3 (II).The main reaction products of cyclohexadienes and pentadiene (at 80 deg C, 10 atm) are unsaturated monoaldehydes.In hydroformylation of 1,5-cyclooctadiene the main product is formylcyclooctane.Key words: Rhodium; Olefins; Hydroformylation
The Cycloaddition of the 1,3-Butadiene Radical Cation with Acrolein and Methyl Vinyl Ketone
Castle, Lyle W.,Gross, M. L.
, p. 637 - 646 (1989)
The 1,3-butadiene radical cation reacts with acrolein and methyl vinyl ketone to produce 'stable' adducts.The nature of the reaction and the structures of the adducts were investigated by collisional activation decomposition (CAD) combined with tandem mas
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Werstink,Kadai
, p. 3350,3357 (1972)
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A high-performance selective oxidation system for the facile production of fine chemicals
Raja, Robert,Thomas, John Meurig,Greenhill-Hooper, Mike,Doukova, Violeta
, p. 1924 - 1926 (2007)
MnIIIAlPO-5 and CrVIAlPO-5 redox (microporous) catalysts are effective, in the presence of dissolved acetylperoxyborate (APB) under mild conditions (333-373 K), and much superior to the titanosilicate, TS-1 (also a single-site heterogeneous catalyst), in the selective oxidation of primary, secondary, benzylic and other unsaturated alcohols, p-cymene, methyl cyclohexene and other speciality organics which are of value in the fine-chemical and pharmaceutical industries. The Royal Society of Chemistry.
Cyclohexyldimethanol synthetic method, catalyst and use thereof (by machine translation)
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Paragraph 0059-0061; 0065-0067, (2018/05/16)
The present invention provides a method for synthesis of cyclohexane dimethanol, comprises the following steps: under the action of catalyst, cyclohexene formaldehyde by the hydroformylation reaction and hydrogenation reaction to make said cyclohexyldimet
