A facile and an efficient strategy for the synthesis of multisubstituted pyrrole derivatives was developed using an unusual ring annulation of dialkyl acetylene dicarboxylic ester and α-amino acids with transition-metal oxides such as mercuric(II) oxide and silver(I) oxide and complexes such as ceric ammonium nitrate (CAN) and 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDCI) as catalysts
使用二烷基乙炔二羧酸酯和 α-氨基酸与过渡金属氧化物如氧化汞 (II) 和氧化银 (I) 及其配合物的不寻常环化,开发了一种简便有效的合成多取代吡咯衍生物的策略如硝酸铈铵(CAN)和1-乙基-3-(3-二甲氨基丙基)碳二亚胺盐酸盐(EDCI)作为催化剂。
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
A facile and direct synthetic entry to 4-hydroxy-1H-pyrrole-2,3-dicarboxylic acidderivatives is reported. It is based on the unusual ring annulation of acetylenic esters and α-aminoacids with isocyanide or carbodiimide under neutral conditions in a one-step procedure.