Asymmetric cyclopropanation of chiral (1-dimethoxyphosphoryl-2-phenyl)vinyl p-tolyl sulfoxide:: a new synthesis of enantiomerically pure 2-amino-3-phenyl-1-cyclopropane-phosphonic acid -: a constrained analog of phaclofen

被引:35
|
作者
Midura, WH [1 ]
Mikolajczyk, M [1 ]
机构
[1] Polish Acad Sci, Ctr Mol & Macromol Studies, Dept Heteroorgan Chem, PL-90363 Lodz, Poland
关键词
asymmetric cyclopropanation; chiral alpha-phosphorylvinyl sulfoxides aminocyclopropanephosphonic acid;
D O I
10.1016/S0040-4039(02)00374-X
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
E-(S)-(1-Dimethoxyphosphoryl-2-phenyl)vinyl p-tolyl sulfoxide 3 was found to undergo cyclopropanation with sulfur ylides [dimethyl(oxo)sulfonium methylide, diphenyl sulfonium isopropylide and ethyl (dimethylsulfuranylidene)acetate (EDSA)] in a highly diastereoselective manner. The major diastereomer obtained in the reaction of E-(S)-3 with EDSA vas converted into enantiopure (2R)-amino-(3R)-phenyl-(1R)-cyclopropane-phosphonic acid, a constrained analog of the GABA(B) antagonist. phaclofen. (C) 2002 Published by Elsevier Science Ltd.
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页码:3061 / 3065
页数:5
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