Palladium Nanoparticles Entrapped in Aluminum Hydroxide: Dual Catalyst for Alkene Hydrogenation and Aerobic Alcohol Oxidation
摘要:
A new aluminum hydroxide-supported palladium catalyst (1) made by a one-pot synthesis through nanoparticle generation and gelation shows a dual catalytic activity for olefinic hydrogenation and aerobic alcohol oxidation.
Reductive Chlorination and Bromination of Ketones via Trityl Hydrazones
作者:Julius R. Reyes、Viresh H. Rawal
DOI:10.1002/anie.201510909
日期:2016.2.24
A method is presented for the direct transformation of a ketone to the corresponding reduced alkyl chloride or bromide. The process involves the reaction of a ketone trityl hydrazone with tBuOCl to give a diazene which readily collapses to the α‐chlorocarbinyl radical, reduction of which by a hydrogen atom source gives the alkyl chloride product. The use of N‐bromosuccinimide provides the corresponding
The aminopropylated Silica-Gel hydrochloride (APSG.HCl) proved to be an efficient catalyst for the rapid conversion of carbonyl compounds in the corresponding acetals with high yields and in mild and selective conditions. In addition to the obvious advantages offered by heterogeneous catalysis, the present method results very useful when the presence of a weakly-acidic function chemically bonded on
Herein an operationally simple alkylation of methylene ketones with primary alcohols is reported. Use of an inexpensive and earth abundant Mn/1,10-phenanthroline system enables direct access to a series of functionalised branchedketones including one-pot sequential double alkylation and Alzheimer's drug donepezil. Preliminary mechanistic investigation, determination of the rate and order of reactions
Treatment of structurally diverse alcohols with dimethyl sulfoxide in the presence of trichloromethyl chloroformate (phosgene dimer) and triethylamine efficiently afforded the corresponding aldehydes or ketones in excellent yields.
AlNiCl2.6H2OTHF: A new, mild and neutral system for selective reduction of organic functional groups
作者:Bhabani K. Sarmah、Nabin C. Barua
DOI:10.1016/s0040-4020(01)82402-9
日期:1991.9
A mild and neutral reducing system consisting of AlNiCl2.6H2OTHF has been developed and reacted with a series of organic compounds containing different functional groups in order to evaluate its synthetic utility. It was observed that this system very efficiently reduces the α-enones to the saturated ketones, aromatic aldehydes and ketones to the corresponding alcohols, nitriles and nitroarenes to