Synthesis of Enantiomerically Pure (1S,2S)-1-Aminocyclopropanephosphonic Acids from (2S)-Methylcyclopropanone Acetal
作者:Antoine Fadel、Nicolas Tesson
DOI:10.1002/1099-0690(200006)2000:11<2153::aid-ejoc2153>3.0.co;2-x
日期:2000.6
of methylcyclopropanone acetal (2S)-4b with chiral amines and a trialkyl phosphite has been devised, by means of which the amino phosphonate esters 8 are obtained with excellent diastereoselectivities. Catalytic hydrogenolysis and hydrolysis of these phosphonates gives (1S,2S)-1-amino-2-methylcyclopropanephosphonic acid 1b in good overall yield and with excellent enantiomeric excess.
已经设计了甲基环丙酮缩醛 (2S)-4b 与手性胺和亚磷酸三烷基酯的一锅反应,通过该反应获得具有优异非对映选择性的氨基膦酸酯 8。这些膦酸酯的催化氢解和水解得到 (1S,2S)-1-氨基-2-甲基环丙烷膦酸 1b,总产率高,对映体过量。