Reported herein is a visible‐light‐mediated radical approach to the α‐alkylation of ketones. This method exploits the ability of a nucleophilic organocatalyst to generate radicals upon SN2‐based activation of alkyl halides and blue light irradiation. The resulting open‐shell intermediates are then intercepted by weakly nucleophilic silyl enol ethers, which would be unable to directly attack the alkyl
Neutral-Eosin Y-Catalyzed Regioselective Hydroacylation of Aryl Alkenes under Visible-Light Irradiation
作者:Xinxin Tang、Jie Wu、Haiwang Liu、Fei Xue、Mu Wang
DOI:10.1055/a-1319-6237
日期:2021.3
The hydroacylation of styrene derivatives were achieved by employing neutral eosin Y as a direct hydrogen atom transfer (HAT) catalyst under visible-light irradiation. Exclusive anti-Markovnikov selectivity could be obtained. Aldehydes and styrenes with various substituents were tolerated (>20 examples) to achieve products with moderate to high yields. The key acyl radical intermediate was generated
通过在可见光照射下使用中性曙红 Y 作为直接氢原子转移 (HAT) 催化剂来实现苯乙烯衍生物的加氢酰化。可以获得独特的抗马尔科夫尼科夫选择性。可以容忍具有各种取代基的醛和苯乙烯(> 20 个例子)以实现中等至高产率的产品。关键的酰基自由基中间体由光激发的曙红 Y 诱导的直接 HAT 过程产生。随后加入苯乙烯和反向 HAT 过程产生酮产物。
Ketones
申请人:Barton John Peter
公开号:US20050272036A1
公开(公告)日:2005-12-08
Compounds of formula (I): wherein variable groups are as defined within; for use in the inhibition of 11βHSD1 are described.
A micro-organism possessing enantioselective and regioselective nitrile hydratase/amidase activities
申请人:ISTITUTO BIOCHIMICO ITALIANO
GIOVANNI LORENZINI S.p.A.
公开号:EP1291435A2
公开(公告)日:2003-03-12
The present invention is concerned with new micro organisms, preferably mutagenised, belonging to the genus Agrobacterium radiobacter able to convert nitriles and/or amides into their respective acids, in addition to conversion processes utilising said microorganisms.