Reductive Desymmetrization of 2-Alkyl-1,3-diketones Catalyzed by Optically Active β-Ketoiminato Cobalt Complexes
作者:Yuhki Ohtsuka、Kiichirou Koyasu、Taketo Ikeno、Tohru Yamada
DOI:10.1021/ol016204h
日期:2001.8.9
[reaction: see text] The reductive desymmetrization of acyclic 1,3-diketones was achieved for the first time by catalytic borohydride reduction in the presence of optically active beta-ketoiminato cobalt(II) complex catalysts. In this reaction, various 2-substituted-1,3-diaryl-1,3-propanediones were converted into the corresponding optically active 2-substituted-1,3-diaryl-3-hydroxypropanone in good-to-high
[反应:见正文]在光学活性的β-酮亚胺基钴(II)络合催化剂的存在下,催化硼氢化物的还原首次实现了无环1,3-二酮的还原脱对称。在该反应中,将各种2-取代的-1,3-二芳基-1,3-丙二酮以良好的高收率转化成相应的旋光的2-取代的-1,3-二芳基-3-羟基丙酮,并具有优异的非对映体-对映选择性和高催化效率。