A convenient synthesis of substituted 3-alkoxycarbonyl-?,?-unsaturated esters with predominant Z-selectivity
作者:Yanchang Shen、Yuming Zhang
DOI:10.1002/hc.10142
日期:——
reaction of bis[2,2,2-trifluoroethyl]phosphite with sodium hydride, dimethyl maleate, and aldehydes gives 3-alkoxycarbonyl-β,γ-unsaturated esters with predominant Z-selectivity in 62–94% yields (Z/E = 85–60:15–40). The Z- and E-isomer can be separated conveniently by column chromatography. © 2003 Wiley Periodicals, Inc. Heteroatom Chem 14:276–279, 2003; Published online in Wiley InterScience (www.interscience
双[2,2,2-三氟乙基]亚磷酸酯与氢化钠、马来酸二甲酯和醛的连续反应得到 3-烷氧基羰基-β,γ-不饱和酯,Z-选择性占优势,产率 62-94% (Z/E = 85–60:15–40)。Z-和E-异构体可以方便地通过柱色谱分离。© 2003 Wiley Periodicals, Inc. 杂原子化学 14:276–279, 2003; 在线发表于 Wiley InterScience (www.interscience.wiley.com)。DOI 10.1002/hc.10142