A new synthetic approach for imidazo[1,2-<i>a</i>]imidazoles and pyrrolo[1,2-<i>a</i>]imidazoles
作者:Patrik Kolar、Miha Tišler
DOI:10.1002/jhet.5570320123
日期:1995.1
Substituted pyrrolo[1,2-a]imidazoles and imidazo[1,2-a]imidazoles are prepared in a simple one pot reaction sequence from esters of heterocyclic or aromatic α-amino acids. The reaction involves condensation with acetoine followed by cyclization with either malonodinitrile, ethyl cyanoacetate or cyanamide.
取代的吡咯并[1,2- a ]咪唑和咪唑并[1,2- a ]咪唑是从杂环或芳族α-氨基酸的酯按简单的一锅反应顺序制备的。该反应包括与乙醛缩合,然后与丙二腈,氰基乙酸乙酯或氰酰胺环化。