Novel Platinum-Catalyzed Ring-Opening of 1,2-Cyclopropanated Sugars with Alcohols. Stereoselective Synthesis of 2-C-Branched Glycosides
作者:Jürgen Beyer、Robert Madsen
DOI:10.1021/ja982964k
日期:1998.11.1
Platinum-Catalyzed Ring Opening of 1,2-Cyclopropanated Sugars with <i>O</i>-Nucleophiles. Convenient Synthesis of 2-<i>C</i>-Branched Carbohydrates
作者:Jürgen Beyer、Philip R. Skaanderup、Robert Madsen
DOI:10.1021/ja001558+
日期:2000.10.1
in the ring opening with alcohols regardless of the stereochemistry of the starting cyclopropane. When electron-rich phenols are employed as O-nucleophiles, rearrangement to the glycosyl arene has been observed. In general, the ring opening occurs readily with unsubstituted sugar cyclopropanes to give 2-C-methyl carbohydrates. However, cyclopropanes with ester or alkyl substituents are significantly