Diversity oriented efficient access of trisubstituted purines via sequential regioselective Mitsunobu coupling and SNAr based C6 functionalizations
作者:Atul Manvar、Anamik Shah
DOI:10.1016/j.tet.2012.10.079
日期:2013.1
An efficient protocol for the syntheses of diverse 2,6,7- and 2,6,9-trisubstituted purines is reported starting from the guanine precursor, 2-amino-6-chloropurine nucleoside through subsequent regioselective, high yielding Mitsunobu coupling and nucleophilic substitutions at C6 with versatile primary and secondary amines. A wide range of 2,6,7- and 2,6,9-trisubstituted purines were accessible in good
据报道,从鸟嘌呤前体2-氨基-6-氯嘌呤核苷开始,通过随后的区域选择性,高产率的Mitsunobu偶联和亲核取代,可以合成多种2,6,7-和2,6,9-三取代嘌呤的有效方案。在C 6下具有通用的伯胺和仲胺。各种各样的2,6,7-和2,6,9-三取代嘌呤可以良好的收率获得,并且具有出色的官能团耐受性。此外,还以优异的产率完成了无溶剂的前体2和3的大规模合成以及有机磷侧链4和5的简便制备。