A Novel, Efficient, and Highly Selective O-Bn Bond Cleavage Reaction via a Rare K-Induced Electron Transfer Process
作者:Yong Qiang Tu、Lei Shi、Wu Jiong Xia、Fu Min Zhang
DOI:10.1055/s-2002-33519
日期:——
A new, efficient and highly selective deprotective method of both benzyl and benzylidene groups for protection of monohydroxyl and dihydroxyl, respectively, has been developed by using the system K-t-BuNH2-t-BuOH-18-crown-6. This method is valuable since it can not only selectively protect the TBDMS and THP groups and the ethylene ketal from cleavage, but also keep the separate or conjugated C=C bonds
使用 Kt-BuNH2-t-BuOH-18-crown-6 系统开发了一种新的、高效的、高选择性的苄基和亚苄基去保护方法,分别用于保护单羟基和二羟基。这种方法很有价值,因为它不仅可以选择性地保护 TBDMS 和 THP 基团以及乙烯缩酮免于裂解,而且还可以防止单独或共轭的 C=C 键被还原。还提出了可能的电子转移反应过程。