DDQ mediated regiospecific protection of primary alcohol and deprotection under neutral conditions: Application of new p -methoxy benzyl-pixyl ether as reagent of choice for nucleoside protection
作者:Penjarla Srishylam、A. Raji Reddy、Shyamapada Banerjee、Santhosh Penta、Yogesh S. Sanghvi
DOI:10.1016/j.tetlet.2017.05.066
日期:2017.6
A simple and efficient protocol is described for regiosepecific protection of primary hydroxyl group both in nucleosides and other molecules with p-methoxy-benzyl 2,7-dimethyl pixylether (MBDPE) in presence of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ). Furthermore, swift deprotection of 2, 7-dimethylpixyl (DMPx) is accomplished with DDQ in MeOH. Both procedures are successfully implemented on
一个简单的,高效的协议被用于在两个核苷和其它分子与伯羟基的保护regiosepecific描述p -米乙氧基b enzyl 2,7- d imethyl p ixyl ë疗法(MBDPE)中的存在2,3-二氯5,6-二氰基-1,4-苯醌(DDQ)。此外,用DDQ在MeOH中快速脱保护2,7-二甲基pixyl(DMPx)。两种方法均在革兰氏级合成修饰核苷上成功实现。该方案为DMPx基团的选择性保护和脱保护提供了温和和中性的条件,同时可与其他常规保护基团(例如苯甲酰基,苄基,THP,TBDPS和丙酮化物)相容。