Rapid access to N -Boc phenylglycine derivatives via benzylic lithiation reactions
作者:Claude Barberis、Normand Voyer、Johanne Roby、Sylvain Chénard、Martin Tremblay、Philippe Labrie
DOI:10.1016/s0040-4020(01)00159-4
日期:2001.4
novel and efficient method for the enantioselective synthesis of N-Boc protected phenylglycines. Yields and enantiomeric ratios vary widely depending on the nature of the solvent, the substrate and on the method of forming the chiral complex. Results show that the major reaction pathway is an enantioselective deprotonation/substitution process. The enantioselectivity appears to be limited by the chiral
我们报告了一种新型有效的方法,用于N- Boc保护的苯基甘氨酸的对映选择性合成。产率和对映体比率根据溶剂,底物的性质和形成手性络合物的方法而有很大差异。结果表明,主要反应途径是对映选择性去质子化/取代过程。对映选择性似乎受s -BuLi-(-)-天冬氨酸络合物的手性鉴别能力的限制。所述的合成方法是获得有用的对映体富集的N- Boc苯基甘氨酸衍生物的最短途径之一。