Preparation of enantiomerically enriched bromohydrins by reaction of sulfoximinooxiranes with MgBr2 in the presence of tetra-butylammonium borohydride
作者:Peter L. Bailey、Andrew D. Briggs、Richard F.W. Jackson、Jörg Pietruszka
DOI:10.1016/0040-4039(93)88118-3
日期:1993.10
Treatment of enantiomerically pure N-tosylsulfoximinooxiranes 6 with MgBr2 in the presence of tetra-butylammonium borohydride gives enantiomerically enriched bromohydrins 3, together with small amounts of the simple primary alcohols. The bromohydrins are isolated in good yields with enantiomeric excess in the range 70% to 91 % (as assessed by enantioselective g.l.c.
在四丁基硼氢化硼的存在下,用MgBr 2处理对映体纯的N-甲苯磺酰亚氨基肟酸6,得到对映体富集的溴代醇3和少量的简单伯醇。以高收率分离出溴代醇,对映体过量范围为70%至91%(通过对映选择性glc评估)