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
A stereoselective route to the sugar-cinnamate unit of Hygromycin A
作者:J.Grant Buchanan、David G. Hill、Richard H. Wightman、Ian K. Boddy、Brian D. Hewitt
DOI:10.1016/0040-4020(95)00262-7
日期:1995.5
Various aryl 6-deoxy-5-keto-β-D-arabino-hexofuranosides, including one (42) corresponding to the sugar-cinnamateunit of Hygromycin A (1) have been synthesized by a method in which 6-deoxy-β-D-glucofuranosides are first prepared, followed by configurational inversion at positions 2 and 3 via 2,3-anhydro-6-deoxy-β-D-mannofuranosyl intermediates.