Orthogonal Regioselective Synthesis of N-Alkyl-3-substituted Tetrahydroindazolones
作者:Jonghoon Kim、Heebum Song、Seung Bum Park
DOI:10.1002/ejoc.201000516
日期:——
A divergent strategy for the regioselective and orthogonal synthesis of complementary regioisomers of N-alkyl-3-substituted-tetrahydroindazolones 3 and 4 was achieved from Boc-protected alkylhydrazines 1. The robustness and substrate generality of this method were validated by synthesizing 3 and 4 through the intra- and intermolecular condensation of 1 with various 2-acylcyclohexane-1,3-diones 2 and
从 Boc 保护的烷基肼 1 中实现了区域选择性和正交合成 N-烷基-3-取代四氢吲唑酮 3 和 4 的互补区域异构体的不同策略。通过合成 3 和 4 验证了该方法的稳健性和底物通用性1 分别与各种 2-酰基环己烷-1,3-二酮 2 和醛的分子内和分子间缩合。