Regioselective role of the hydrazide moiety in the formation of complex pyrrole–pyrazole systems
作者:Orazio A Attanasi、Paolino Filippone、Francesca R Perrulli、Stefania Santeusanio
DOI:10.1016/s0040-4020(00)01125-x
日期:2001.2
acid hydrazide leads to the corresponding hydrazone derivatives. In the presence of sodium carbonate, these compounds react at room temperature with acetoacetanilide or 2,4-pentanedione to give the corresponding 1-aminopyrrole rings through the relevant 1,2-diaza-1,3-butadiene intermediates. In the presence of sodium methoxide, the activated methylene group present on the 1-amino side chain of the heterocycles