(E)-stereoselective synthesis of vinylglycines from (R)-serine via organocopper–BF<sub>3</sub>and related reagents
作者:Toshiro Ibuka、Keisuke Suzuki、Hiromu Habashita、Akira Otaka、Hirokazu Tamamura、Norio Mimura、Yoshihisa Miwa、Tooru Taga、Nobutaka Fujii
DOI:10.1039/c39940002151
日期:——
The stereoselective synthesis of biologically important vinylglycine derivatives by reaction of homochiral 4-methoxycarbonyl-5-vinyloxazolidin-2-ones with organocopper reagents is described; 4,5-trans-oxazolidin-2-one 6 yields (E)-vinylglycines as the major products by treatment with the âhigher orderâ cyanocuprateâBF3 reagents or trialkylzincates in the presence of cuprous cyanide, 4,5-cis-oxazolidin-2-one 10 affords only the desired (E)-vinylglycines.
本文介绍了通过同手性 4-甲氧基羰基-5-乙烯基恶唑烷-2-酮与有机铜试剂反应,立体选择性合成具有重要生物价值的乙烯基甘氨酸衍生物的方法;4,5-反式噁唑烷-2-酮 6 在氰化亚铜存在下与 "高阶 "氰基杯酸盐试剂或三烷基锌酸盐处理后,可生成(E)-乙烯基甘氨酸作为主要产物,而 4,5-顺式噁唑烷-2-酮 10 只能生成所需的(E)-乙烯基甘氨酸。