作者:Claudio Palomo、Mikel Oiarbide、Arun K. Sharma、M. Concepción González-Rego、Anthony Linden、Jesús M. García、Alberto González
DOI:10.1021/jo001031f
日期:2000.12.1
(1R)-2-endo-Bromoacetyl-1,7,7-trimethylbicyclo[2.2.1]heptan-2-ol (endo-2-bromoacetylisoborneol) 4 and its trimethylsilyl ether 3 are presented as efficient reagents for the asymmetric Darzens reaction. From the alpha,beta-epoxy ketone adducts the chiral inductor camphor is removed, by treatment with ceric(IV) ammonium nitrate, to yield the corresponding epoxy acids which are isolated as their dicyclohexylammonium
作为不对称Darzens反应的有效试剂,提出了(1R)-2-内-溴乙酰基-1,7,7-三甲基双环[2.2.1]庚-2-醇(内基-2-溴乙酰基异冰片醇)4及其三甲基甲硅烷基醚3。 。通过用硝酸铈(IV)铵处理,从α,β-环氧酮加合物中除去手性电感樟脑,得到相应的环氧酸,将其分离为其二环己基铵盐。