Asymmetric Conjugate Addition of Alkylzirconium Reagents to α,β-Unsaturated Lactones
作者:Eleanor E. Maciver、Rebecca M. Maksymowicz、Nancy Wilkinson、Philippe M. C. Roth、Stephen P. Fletcher
DOI:10.1021/ol501292x
日期:2014.6.20
The asymmetric synthesis of β-substituted lactones by catalytic asymmetric conjugate addition of alkyl groups to α,β-unsaturated lactones is reported. The method uses alkylzirconium nucleophiles prepared in situ from alkenes and the Schwartz reagent. Enantioselective additions to 6- and 7-membered lactones proceed at rt, tolerate a wide variety of functional groups, and are readily scalable. The method
据报道,通过α,β-不饱和内酯的烷基催化不对称共轭加成,β-取代内酯的不对称合成。该方法使用由烯烃和Schwartz试剂原位制备的烷基锆亲核试剂。对元和六元内酯的对映选择性加成反应在室温进行,可耐受多种官能团,并且易于扩展。该方法用于正式的不对称合成mitsugashiwalactone。