Stereoselective synthesis of both enantiomers of trans-2-(diphenylmethylideneamino)cyclopropanecarboxylic acid using a chiral pool approach and their incorporation in dipeptides
作者:Tamara Meiresonne、Sven Mangelinckx、Norbert De Kimpe
DOI:10.1016/j.tet.2012.09.078
日期:2012.11
The stereoselective synthesis of (1R,2R)- and (1S,2S)-trans-2-(diphenylmethylideneamino)cyclopropanecarboxylic acid has been accomplished in six steps starting from (2S)- and (2R)-β-benzyl N-(tert-butoxycarbonyl)aspartate, respectively. The key-step in the reaction sequence is a stereoselective base-induced ring closure with a good trans diastereoselectivity. These novel trans-β-ACC derivatives could
从(2 S)-和(2 R)-β开始的六个步骤完成了(1 R,2 R)-和(1 S,2 S)-反式-2-(二苯基亚甲基氨基)环丙烷羧酸的立体选择性合成-苄基N-(叔丁氧基羰基)天冬氨酸。反应序列中的关键步骤是立体选择性碱基诱导的具有良好反式非对映选择性的闭环反应。可以使用标准的肽偶联技术将这些新颖的反式-β-ACC衍生物掺入二肽中。