The catalytic hydrogenation of alpha , beta -unsaturated ketones of the formula R1-CH=CH-CO-R2, in which R1 and R2 independently of one another represent straight-chain or branched alkyl, hydroxy-alkyl, alkenyl, cycloalkyl, cycloalkenyl, aralkyl or aryl, where at least one of the radicals ...
Rand Rare hydrogen or C-Calkyl, or Rand Rtogether are O, C-Calkylene or CH═CH; Ris C-Calkyl; R, R, R, R, Rand Rare for example hydrogen or C-Calkyl; and X is a x-valent cationic counter ion; are in particular suitable as photoinitiators for the curing with UV-A light (32...
公开/公告日期: 1991-02-19 申请(专利权)人: BP CHEM INTERNATL LTD 发明人: BP Gureishii 摘要: PURPOSE: To produce corresponding alcohols in a high selectivity by hydrogenating α-hydroxy ketones, especially dihydroxy acetone, in a liquid phase in the presence of a carboxylic acid.收藏...
The hydrogen transfer mechanism of cofactor reduction and recycling processes in the yeast reduction of α,β-unsaturated ketone was studied by using quantitative isotope tracing close to natural abundance measured by 2H NMR. In the reaction, the active cofactor is NADPH. The cofactor-transferred hydr...
The mechanism of amine-catalyzed halohydrin formation from .alpha.-chloro ketones and phosphonate diesters No abstract is available for this article. B Springs,P Haake - 《Chemischer Informationsdienst》 被引量: 20发表: 1977年 Cloning of Two Halohydrin Hydrogen-Halid-Lyase Genes of Corynebacterium ...
Ketones as electrophilic substrates of lipoxygenase The rate-limiting step of the lipoxygenase reaction involves the abstraction of a hydrogen from the methylene carbon of a 1,4-diene. One possibility for th... JS Wiseman,JS Nichols - 《Biochemical & Biophysical Research Communications》 被引量: ...
A process for producing alpha, beta-unsaturated ketones represented by the following general formula wherein R, represents a hydrocarbon radical, R represents an organic radical bonded through a carbon-carbon bond, R and R represent a hydrogen atom or a hydrocarbon radical, and R, R, R and R...
The selective transfer hydrogenation of alpha,beta-unsaturated carbonyl compounds to saturated ones was achieved by the use of 2-propanol as a hydrogen don... S Sakaguchi,T Yamaga,Y Ishii - 《Journal of Organic Chemistry》 被引量: 192发表: 2001年 Iridium-Catalyzed Enantioselective Hydrogenation of...
An alpha-chloroketone is defined as a compound obtained by the reaction of alpha-dichloroaryltelluroketones with chlorine in dichloromethane, resulting in the formation of corresponding alpha-chloroketones in good yields. AI generated definition based on: Tellurium in Organic Synthesis (Second Edition)...
Direct formation of α-fluorosulfones from sulfoxides bearing α-hydrogens merely by reacting molecular fluorine (5% F2/N2) is reported and a possible mechanism for this novel α-fluorination reaction is proposed.DOI: 10.1246/cl.1995.581 被...