Palladium(0)-Catalyzed Methylcyclopropanation of Norbornenes with Vinyl Bromides and Mechanism Study
作者:Jiangang Mao、Hujun Xie、Weiliang Bao
DOI:10.1021/acs.orglett.5b01603
日期:2015.8.7
cycloadditions of vinyl bromides to norbornenes catalyzed by Pd(OAc)2/PPh3 in the presence of CH3ONa and CH3OH has been established. A methylcyclopropane subunit was installed by a 3-fold domino procedure involving a key protonation course. Preliminary deuterium-labeling studies revealed that the proton came from methyl of CH3OH and also exposed an additional hydrogen/deuterium exchange process. These two
Palladium(0)-Catalyzed Methylenecyclopropanation of Norbornenes with Vinyl Bromides
作者:Jiangang Mao、Weiliang Bao
DOI:10.1021/ol500829t
日期:2014.5.16
Highly strained methylenecyclopropane derivatives have been achieved via a novel and efficient Pd(0)-catalyzed domino reaction. The formal [2 + 1] cycloaddition reaction of vinyl bromides to norbornenes involves a Heck-type coupling and a C(sp2)–H bond activation.
Palladium-Catalyzed Two-Component Domino Coupling Reaction of (<i>Z</i>)-β-Bromostyrenes with Norbornenes: Synthesis of 1,5-Enynes
作者:Jiangang Mao、Huifang Li、Herui Wen、Min Li、Xiaolin Fan、Weiliang Bao
DOI:10.1002/adsc.201500865
日期:2016.6.16
have been achieved via a palladium(0)‐catalyzeddominocoupling reaction of (Z)‐β‐bromostyrenes with norbornenes in the presence of cesium carbonate and N,N‐dimethylformamide. The process involves a double Heck‐type procedure, two‐fold C(sp2)H activation and formation of two carbon‐carbon bonds. There are possibilities of diversified transformation for the dominocoupling of (Z)‐β‐bromostyrenes with