An efficient strategy for the regioselective synthesis of 3-phosphorylated-1-aminopyrroles from β-hydrazono phosphine oxides and phosphonates
作者:Francisco Palacios、Domitila Aparicio、Jesús M. de los Santos
DOI:10.1016/s0040-4020(99)00860-1
日期:1999.11
An easy strategy for the synthesis of 1-aminopyrroles substituted with a phosphine oxide or phosphonate group in the 3-position is described. The key step is the 1,4-conjugate addition of the enamine to the 4-phosphorylated 1,2-diazabuta-1,3-diene 3 and heterocyclisation to give substituted 1-aminopyrroles 9. Basic hydrolysis of pyrroles 9 afforded 3-phosphinoyl-1-aminopyrroles 11. Similarly substituted