Synthesis of 4-Hydroxy-1H-pyrrole-2,3-dicarboxylic Acid Derivatives: Unusual Coupling of Acetylenic Esters and α-Amino Acids in the Presence of Cyclohexyl Isocyanide or N,N′-Dicyclohexylcarbodiimide
作者:Abdolali Alizadeh、Reza Hosseinpour、Sadegh Rostamnia
DOI:10.1055/s-2008-1067159
日期:2008.8
A facile and direct synthetic entry to 4-hydroxy-1H-pyrrole-2,3-dicarboxylic acid derivatives is reported. It is based on the unusual ring annulation of acetylenic esters and α-amino acids with isocyanide or carbodiimide under neutral conditions in a one-step procedure.
4-羟基-1H-吡咯-2,3-二羧酸衍生物的一种简便直接的合成方法被报道。它是基于在中性条件下,乙炔酯和 α-氨基酸与异氰化物或碳二亚胺在一步过程中的不寻常环环化。