作者:Johann Hiebl、Hermann Kollmann、Franz Rovenszky、Karin Winkler
DOI:10.1021/jo982034j
日期:1999.3.1
The preparation of alkyl diamino dicarboxylic acids with high optical purity (100% ee, >98.5% de) and high yields based on asymmetric catalytic hydrogenation is described. The required prochiral precursors are prepared from dialdehydes and Z-, Boc-, and acetyl-protected phosphonoglycines. Aqueous solutions of glyoxal, succinic dialdehyde, and glutaric dialdehyde were used to prepare the diunsaturated
描述了基于不对称催化氢化制备具有高光学纯度(100%ee,> 98.5%de)和高产率的烷基二氨基二羧酸。所需的前手性前体由二醛和Z-,Boc-和乙酰基保护的膦酰甘氨酸制备。使用乙二醛,琥珀酸二醛和戊二醛的水溶液制备2,5-二氨基己二酸(DAA),2,7-二氨基丁二酸(DAS)和2,8-二氨基壬二酸(DAZ)的双不饱和前体。通过用[(COD)Rh(S,S)-Et-DuPHOS] OTf氢化相应的前手性原料,获得ZA保护的DAA,DAS和DAZ二甲基酯。