作者:Franca M. Cordero、Federica Pisaneschi、Karina Meschini Batista、Silvia Valenza、Fabrizio Machetti、Alberto Brandi
DOI:10.1021/jo0487653
日期:2005.2.1
The synthesis of a new conformationally constrained Gly-(s-cis)Pro Turn Mimetic (GPTM) in both racemic and enantiomerically pure forms and their incorporation into peptides 18, 21, and 24 are reported. The synthetic strategy adopted to assemble the bicyclic pyrrolizidinone skeleton is based on the 1,3-dipolar cycloaddition of the cyclic nitrone 4a derived from proline and acrylamide, followed by a
一个新的构象受限Gly-(合成s-顺)临折模拟物(GPTM)在这两个外消旋对映体和纯的形式和它们掺入到肽18,21,和24中报告。组装双环吡咯烷酮骨架所采用的合成策略基于衍生自脯氨酸和丙烯酰胺的环状硝酮4a的1,3-偶极环加成,然后进行还原性裂解/环化多米诺过程。对映体纯的GPTM通过合成和分离含有(1R)-1-苯基乙胺作为手性助剂的非对映异构中间体而获得。pseudotripeptides分析18,21,和通过FT-IR和NMR的22显示,GPTM衍生物21的酰胺质子在分子内氢键结合在CDCl 3中,而显示DMSO破坏了该氢键。