Catalytic Asymmetric Synthesis Using Feedstocks: An Enantioselective Route to 2-Arylpropionic Acids and 1-Arylethyl Amines via Hydrovinylation of Vinyl Arenes
作者:Craig R. Smith、T. V. RajanBabu
DOI:10.1021/jo900198b
日期:2009.4.17
been developed. Excellent yields (>97%), regioselectivities (>99%), and enantioselectivities (>97% ee) for the desired branched products were obtained in the asymmetric hydrovinylation reactions of vinyl arenes, and the products from these reactions were transformed into 2-arylpropionic acids via oxidative degradation. Subsequent Curtius or Schmidt rearrangements of these acids provided highly valued 1-arylethyl
已经开发出一种由乙烯基芳烃以几乎对映体纯的形式合成 2-芳基丙酸(洛芬)的三步程序。在乙烯基芳烃的不对称氢化乙烯基化反应中,获得了所需支化产物的优异收率(>97%)、区域选择性(>99%)和对映选择性(>97% ee),并且这些反应的产物转化为2-芳基丙酸通过氧化降解。随后这些酸的 Curtius 或 Schmidt 重排以非常好的收率提供了高价值的 1-芳基乙胺,包括具有 α-手性叔N-烷基的原型伯胺。