Efficient Preparation of α,α-Dialkyl-α-(phenylselanyl)acetates and α,β-Unsaturated Esters from the Corresponding α,α-Dialkyl-α-cyanoacetates by a Lithium Naphthalenide Induced Reductive Selenenylation Process
作者:Jia-Liang Zhu、Yen-Chun Ko
DOI:10.1055/s-2007-990884
日期:2007.12
array of α,α-dialkyl-α-(phenylselanyl)acetates has been synthesized very efficiently from readily available a,a-dialkyl-a-cyanoacetates, by use of lithium naphthalenide induced reductive α-selenenylation as a key operation. Moreover, the selanyl esters thus generated in situ could be converted further, in a one-pot treatment with hydrogen peroxide and acetic acid, into the corresponding α,β-unsaturated
一系列 α,α-二烷基-α-(苯基硒基)乙酸盐已通过使用萘锂诱导的还原性 α-亚硒基化作为关键操作,从容易获得的α,α-二烷基-α-氰基乙酸盐中非常有效地合成。此外,在用过氧化氢和乙酸的一锅法处理中,由此原位产生的二硒酸酯可以进一步转化为相应的α,β-不饱和酯,产率中等至高。在某些情况下,C=C 键的形成是高度区域和/或非对映选择性的。