Convenient synthesis of 4-tert-butyl 2-ethyl 3-amino-1-benzyl-5-dialkylamino-1H-pyrrole-2,4-dicarboxylate derivatives
作者:Yukihiro Nishio、Katsuya Uchiyama、Makoto Kito、Hiroyuki Nakahira
DOI:10.1016/j.tet.2011.02.071
日期:2011.4
Optimization details and limitations of a novel synthetic method of 4-tert-butyl 2-ethyl 3-amino-1-benzyl-5-dialkylamino-1H-pyrrole-2,4-dicarboxylate derivatives are herein disclosed. This synthesis consists of four steps that include a highly selective cyclization, and can be carried out from starting materials to target compounds without column chromatography purification. The high selectivity is
本文公开了2-叔丁基2-乙基3-氨基-1-苄基-5-二烷基氨基-1 H-吡咯-2,4-二羧酸酯衍生物的新型合成方法的优化细节和局限性。该合成包括四个步骤,其中包括高度选择性的环化反应,无需柱色谱纯化即可从起始原料到目标化合物进行合成。高选择性由叔丁酯引起的锂配位和位阻控制。