Catalytic asymmetric synthesis using feedstocks: an enantioselective route to 2-arylpropionic acids and 1-arylethyl amines via hydrovinylation of vinyl arenes.

Catalytic asymmetric synthesis using feedstocks: an enantioselective route to 2-arylpropionic acids and 1-arylethyl amines via hydrovinylation of vinyl arenes.
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使用原料的催化不对称合成:通过乙烯基芳烃的氢旋烯基化,通向2-芳丙酸和1-芳基甲基胺的对映选择性途径。

DOI:
10.1021/jo900198b
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发表时间:
2009-04-17
期刊:
The Journal of organic chemistry
影响因子:
--
通讯作者:
RajanBabu TV
RajanBabu TV
中科院分区:
其他
文献类型:
--
作者:
Smith CR;RajanBabu TV

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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通过氧化降解转化为2-芳基丙酸。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。
A three-step procedure for the synthesis of 2-arylpropionic acids (profens) from vinyl arenes in nearly enantiomerically pure form has 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 amines, including a prototypical primary amine with an α-chiral tertiary N-alkyl group, in very good yields.
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