On the selectivity of deprotection of benzyl, mpm (4-methoxybenzyl) and dmpm (3,4-dimethoxybenzyl) protecting groups for hydroxy functions
作者:Kiyoshi Horita、Tadao Yoshioka、Tatsuyoshi Tanaka、Yuji Oikawa、Osamu Yonemitsu
DOI:10.1016/s0040-4020(01)90593-9
日期:1986.1
The 4-methoxybenzyl (MPM) protecting group for hydroxy functions is readily removed with DDQ in dichloromethane containing a small amount of water at room temperature. Under these neutral conditions, several other protecting and functional groups remained unchanged. 3,4-Dimethoxybenzyl (DMPM) groups are more reactive than MPM groups with DDQ. The benzyl (Bn) protecting group was removed by catalytic
在室温下,用含有少量水的二氯甲烷中的DDQ可以轻松除去羟基官能团的4-甲氧基苄基(MPM)保护基。在这些中性条件下,其他几个保护和官能团保持不变。3,4-二甲氧基苄基(DMPM)基团比具有DDQ的MPM基团更具反应性。通过在阮内镍上催化氢化除去苄基(Bn)保护基。还介绍了DMPM,MPM和Bn基团的选择性脱保护。