Stereoselective transformation of amines via chiral 2,4,6-triphenylpyridinium intermediates
作者:Sadri A. Said、Anne Fiksdahl
DOI:10.1016/s0957-4166(01)00343-3
日期:2001.7
report the preparation and the nucleophilic substitution of the chiral 2,4,6-triphenylpyridinium tetrafluoroborates 2a and 2b. The triphenylpyridinium intermediates were generated from homochiral amines (1a, 1b) and 2,4,6-triphenylpyrylium tetrafluoroborate and used as substrates for stereoselective nucleophilic substitution. The degree of inversion in the substitution reactions has been studied. The
我们在此报告了手性2,4,6-三苯基吡啶鎓四氟硼酸酯2a和2b的制备和亲核取代。三苯基吡啶中间体是由高手性胺(1a,1b)和2,4,6-三苯基吡啶四氟硼酸酯生成的,并用作立体选择性亲核取代的底物。已经研究了取代反应中的转化度。获得的醇(3a,3b)和叠氮化物(4a,4b)产物的构型转化率分别大于99%和96–98%。