Visible-Light-Promoted Synthesis of 1,4-Dicarbonyl Compounds via Conjugate Addition of Aroyl Chlorides
作者:Chao-Ming Wang、Dan Song、Peng-Ju Xia、Jing Wang、Hao-Yue Xiang、Hua Yang
DOI:10.1002/asia.201701738
日期:2018.2.2
A facile visible‐light photocatalytic conjugate addition to prepare 1,4‐dicarbonyl compounds has been developed by employing readily available aroyl chlorides as aryl radical sources. This operationally simple method shows a broad scope with regard to both aroyl chlorides and Michael acceptors. As a result, a variety of 1,4‐diketones were efficiently synthesized in moderate to good yields.
Herein we present a photocatalyst- and additive-free radical hydroacylation of electron-poor double bonds under mild reaction conditions. Using 4-acyl-Hantzsch ester radical reservoirs, various Michaelacceptors, enones and para-quinone methide substrates could be used. The protocol enabled further derivatizations and it could also be extended to a few unactivated alkenes. Moreover, the nature of the
Direct acylation and alkynylation of hydrocarbons <i>via</i> synergistic decatungstate photo-HAT/nickel catalysis
作者:Wenfeng Liu、Yang Ke、Chuhan Liu、Wangqing Kong
DOI:10.1039/d2cc04408k
日期:——
Herein, we describe a protocol for the direct and selective acylation and alkynylation of the C(sp3)–H bonds of saturated hydrocarbons by synergistic decatungstate photo-HAT and nickel catalysis. This method, using cheap and easy-to-synthesize TBADT as a HAT photocatalyst, exhibits excellent siteselectivity. A wide variety of high-value ketones, amides, esters, and diverse alkynes can be efficiently
在这里,我们描述了一种通过协同十钨酸盐光-HAT 和镍催化对饱和烃的 C(sp 3 )-H 键进行直接和选择性酰化和炔基化的方案。该方法使用廉价且易于合成的 TBADT 作为 HAT 光催化剂,具有优异的位点选择性。从丰富的碳氢化合物原料中可以有效地构建各种高价值的酮、酰胺、酯和各种炔烃。
KATRITZKY A. R.; KUZMIERKIEWICZ W., J. CHEM. SOC. PERKIN TRANS.,(1987) N 4, 819-823