Catalytic asymmetric conjugate addition of simple alkyl thiols to alpha,beta-unsaturated N-acylated oxazolidin-2-ones with bifunctional catalysts.

Catalytic asymmetric conjugate addition of simple alkyl thiols to alpha,beta-unsaturated N-acylated oxazolidin-2-ones with bifunctional catalysts.
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DOI:
10.1021/ja8085092
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发表时间:
2009-01-21
影响因子:
15
通讯作者:
Deng L
Deng L
中科院分区:
化学1区
文献类型:
--
作者:
Liu Y;Sun B;Wang B;Wakem M;Deng L

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In this communication, we describe an unprecedented highly enantioselective catalytic conjugate addition of simple alkyl thiols to α,β-unsaturated N-acylated oxazolidin-2-ones catalyzed by acid-base bifunctional catalysis. This reaction provides a useful catalytic method for the synthesis of optically active chiral sulfur compounds that are otherwise difficult to prepare by asymmetric catalysis. The successful development of this reaction resulted from a discovery that, upon proper modification, a cinchona alkaloid bearing a thiourea functionality at 6’ position can afford highly efficient catalysis for asymmetric conjugate additions.
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