and photobiology. However, their applications in photocatalysis are yet to be explored. We report here that sunlight along with 1 mol% cercosporin, which is one of the perylenequinonoid pigments, catalyzes the direct C–H bond arylation of (het)arenes by a photoredox process with good regioselectivity and broad functional group compatibility. Furthermore, a gram-scale reaction with great conversions
Desulfinative palladium‐catalyzed cross‐coupling of arylsulfonyl hydrazides with aryl bromides under air
作者:Qingling Liu、Bo Yang
DOI:10.1002/aoc.5140
日期:2019.10
A highly efficient and mild palladium‐catalyzed cross‐coupling of arylsulfonyl hydrazides and aryl bromides for the selective synthesis of unsymmetrical biaryls has been developed. This methodology has the advantages of easily accessible starting materials, functional group tolerance and a wide range of substrates, which providerapidaccess to biaryls derivatives. In this protocol, abundant and stable
Suzuki‐Miyaura coupling of haloarenes is the most widely used protocol for the synthesis of biphenyls. Organosulfur compounds are promising electrophiles since they are abundant in nature and versatile in organic synthesis. We report here the desulfinylative Suzuki‐Miyaura coupling of aryl sulfoxides with phenylboronic acids using bench‐stable nickel/5‐(2,4,6‐triisopropylphenyl)imidazolylidene[1,5‐a]pyridines
卤代芳烃的Suzuki-Miyaura偶联是联苯合成中使用最广泛的方案。有机硫化合物是有前途的亲电子试剂,因为它们性质丰富且有机合成用途广泛。我们在此报告使用稳定的镍/ 5-(2,4,6-三异丙基苯基)咪唑基亚甲基[1,5- a ]吡啶作为催化剂将芳基亚砜与苯基硼酸的脱亚磺酰基铃木-宫浦偶合。配体易于从常见的商业化学品制备。该方法适用于对称和不对称的芳基亚砜,并且以高达94%的收率获得了一系列带有各种官能团的联苯。