Visible-Light-Promoted Photocatalyst-Free Hydroacylation and Diacylation of Alkenes Tuned by NiCl<sub>2</sub>·DME
作者:Xinxin Zhao、Bing Li、Wujiong Xia
DOI:10.1021/acs.orglett.9b04595
日期:2020.2.7
4-dihydropyridines via an acyl radical addition and hydrogen atom transfer pathway under photocatalyst-free conditions. The efficiency was highlighted by wide substrate scope, good to high yields, successful scale-up experiments, and expedient preparation of highly functionalized ketone derivatives. In addition, this protocol allows for the synthesis of 1,4-dicarbonyl compounds through alkene diacylation in the presence
Ketone Synthesis by Direct, Orthogonal Chemoselective Hydroacylation of Alkenes with Amides: Use of Alkenes as Surrogates of Alkyl Carbanions
作者:Hui Geng、Pei‐Qiang Huang
DOI:10.1002/cjoc.201900252
日期:2019.8
and direct transformation of carboxamides are two exciting areas that have attracted considerable attention in recent years. We report herein that secondaryamides, the least reactive derivatives of carbonyl compounds, upon activated with triflic anhydride, can serve as effective hydroacylating reagents in partner with alkenes to yield ketones at ambient temperature. The method was applied to the one‐step
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。
Laser flash photolysis study of the photochemistry of ring-substituted .beta.-phenylpropiophenones
作者:J. C. Netto-Ferreira、W. J. Leigh、J. C. Scaiano
DOI:10.1021/ja00295a009
日期:1985.5
Desactivation intramoleculaire des carbonyles a l'etat triplet par les groupements aryles en position β. Mecanisme. Donnees cinetiques
Desactivation in intramoleculaire des carbonyles a l'etat 三联体 par les groupements aryles en 位置 β。机制。唐尼电影节