Palladium-catalyzed cross-coupling of aryl chlorides with alkenylboronic acids with low E/Z isomerization
摘要:
Using a bulky electron-rich monodentate benzoferrocenyl phosphine as supporting ligand, an efficient protocol for stereoselective palladium-catalyzed Suzuki-Miyaura cross-coupling of aryl chlorides with alkenylboronic acids was uncovered. Using this protocol, both trans- and cis-alkenylboronic acids can be coupled with high stereoselectivity giving the corresponding vinylarenes in good to quantitative yields. Electron-poor and -rich aryl chlorides including highly hindered ones are all Suitable substrates for the reaction. (C) 2008 Elsevier Ltd. All rights reserved.
作者:Xiao-Shan Ning、Xin Liang、Kang-Fei Hu、Chuan-Zhi Yao、Jian-Ping Qu、Yan-Biao Kang
DOI:10.1002/adsc.201701512
日期:2018.4.17
A Pd‐tBuONO co‐catalyzed scalable and practical synthesis of indoles with molecular oxygen as terminal oxidant is developed. Either terminal or internal 2‐vinylanilines could be smoothly converted to desired indoles under one general condition. This method has been evaluated in the large scale synthesis of indomethacin and a potential anti‐breast cancer drug candidate 1.
Catalytic asymmetric formal [3+2] cycloaddition of isatogens with azlactones to construct indolin-3-one derivatives
作者:Lihua Xie、Yi Li、Shunxi Dong、Xiaoming Feng、Xiaohua Liu
DOI:10.1039/d0cc06418a
日期:——
A number of enantioenriched indolin-3-one derivatives were readily obtained by chiral guanidine-catalyzed [3+2] cycloaddition of isatogens with azlactones.
An m-CPBA-mediated intramolecular epoxidation-decarboxylative alkoxylation cascade reaction of olefinic oxamic acids has been developed.
已开发出一种由m-CPBA介导的内分子环氧化-脱羧烷氧化级联反应,用于烯烃羧酰胺酸的合成。
Enabling CO Insertion into <i>o</i>-Nitrostyrenes beyond Reduction for Selective Access to Indolin-2-one and Dihydroquinolin-2-one Derivatives
作者:Li Yang、Lijun Shi、Qi Xing、Kuo-Wei Huang、Chungu Xia、Fuwei Li
DOI:10.1021/acscatal.8b02863
日期:2018.11.2
The transition metal-catalyzed reductivecyclization of o-nitrostyrene in the presence of carbonmonoxide (CO) has been developed to be a general synthetic route to an indole skeleton, wherein CO was used as a reductant to deoxidize nitroarene into nitrosoarene and/or nitrene with CO2 release, but the selective insertion of CO into the heterocyclic product with higher atom economy has not yet been
The metalcarbonyls Fe(CO)5˙ Ru3(CO)12, and Rh6(CO)16 are catalysts for the deoxygenation of ortho-nitrostyrenes under carbonmonoxide pressure to give indole derivatives; the crystal structure of a non-catalytically active rhodium complex obtained during the synthesis of (5e) is reported.