Highly regioselective palladium-mediated synthesis of stereoisomerically pure (Z)- and (E)-alkyl 2-bromo-3-(hetero)arylpropenoates
作者:Fabio Bellina、Adriano Carpita、Massimo De Santis、Renzo Rossi
DOI:10.1016/0040-4039(94)85040-2
日期:1994.9
Stereoisomerically pure (Z)- and (E)-alkyl 2-bromo-3-(hetero)arylpropenoates, (Z)- and (E)-2, have been efficiently and selectively prepared by Pd(0)-mediated cross-coupling reaction between (hetero)arylzinc halides, 5, and easily available (Z)- and (E)-alkyl 2,3-dibromopropenoates, (Z)- and (E)-4, respectively. Compounds (Z)- and (E)-2 serve as useful precursors to stereoisomerically pure trisubstituted
立体异构纯的(Z)-和(E)-烷基2-溴-3-(杂)芳基丙烯酸酯(Z)-和(E)-2已通过Pd(0)介导的交叉偶合有效且选择性地制备(杂)芳基卤化锌5和容易获得的(Z)-和(E)-烷基2,3-二溴丙酸酯(Z)-和(E)-4之间的反应。化合物(Z)-和(E)-2是立体异构纯三取代(E)-和(Z的有用的前体。)-α,β-不饱和酯。