An efficient synthesis of 2-aminopyrroles from enaminone–amidine adduct and phenacyl/benzyl/heteroalkyl-halides
作者:Hitesh B. Jalani、Amit N. Pandya、Arshi B. Baraiya、Jitendra C. Kaila、Dhaivat H. Pandya、Jayesh A. Sharma、V. Sudarsanam、Kamala K. Vasu
DOI:10.1016/j.tetlet.2011.08.149
日期:2011.11
Herein, we report an efficient and facile synthesis of substituted 2-aminopyrroles from the reaction of enaminone-amidine adduct and various phenacyl, benzyl, or heteroalkyl halides in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) in good to excellent yields. The reaction proceeds through an intramolecular 5-exo trig cyclization resulting into diversely substituted 2-aminopyrroles. (C) 2011 Published by Elsevier Ltd.