1169762-19-9Relevant articles and documents
Convenient synthesis of 4-tert-butyl 2-ethyl 3-amino-1-benzyl-5- dialkylamino-1H-pyrrole-2,4-dicarboxylate derivatives
Nishio, Yukihiro,Uchiyama, Katsuya,Kito, Makoto,Nakahira, Hiroyuki
, p. 3124 - 3131 (2011/05/17)
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 controlled by lithium coordination and steric hindrance caused by tert-butyl ester.