A Versatile Catalyst for Heck Reactions of Aryl Chlorides and Aryl Bromides under Mild Conditions
作者:Adam F. Littke、Gregory C. Fu
DOI:10.1021/ja010988c
日期:2001.7.1
for Heck reactions of arylchlorides and bromides. A sterically and electronically diverse array of aryl bromides, as well as activated arylchlorides, couple with a range of mono- and disubstituted olefins at room temperature, furnishing the arylated product with high E/Z stereoselection. The corresponding reactions of a broad spectrum of electron-neutral and electron-rich arylchlorides proceed at
Chemoselective Construction of Substituted Conjugated Dienes Using an Olefin Cross-Metathesis Protocol
作者:Timothy W. Funk、Jon Efskind、Robert H. Grubbs
DOI:10.1021/ol047929z
日期:2005.1.1
[Reaction: see text] Various substituted conjugateddienes have been made by olefin cross-metathesis. Using either electronic or steric "protection," one of the olefins of the conjugateddiene was deactivated relative to the other for cross-metathesis. The reactions proceed with very high chemoselectivity and, when steric deactivation is used, very high diastereoselectivity.