Conformationally constrained dipeptides. Obtention of enantiomerically pure 6-acetamido-5-oxo-1,2,3,5,6,7-hexahydro-3-indolizine carboxylic acid
作者:Régis Millet、Emmanuelle Meulon、Laurence Goossens、Raymond Houssin、Jean-Pierre Hénichart、Benoît Rigo
DOI:10.1002/jhet.5570370613
日期:2000.11
The separation of a stereoisomeric mixture of esters 6, and the synthesis of the new enantiomerically pure unsaturated 6,5-fused bicyclic lactam 2 are described. The key-step involves trimethylsilyl iodide cleavage, without racemization, of a vinylogous carbamate. The cis N- acetylamino acid 2 is a new scaffold for the synthesis of rigid β-turn mimetics.
描述了酯6的立体异构混合物的分离,以及新对映体纯的不饱和6,5-稠合的双环内酰胺2的合成。关键步骤涉及三聚氰基碘甲烷的裂解,而无需消旋化乙烯基氨基甲酸酯。所述顺式N-乙酰氨基酸2是用于刚性β转角模拟物合成的新支架。