Heteropoly Compound Catalyzed Synthesis of Both Z- and E-α,β-Unsaturated Carbonyl Compounds
作者:Masahiro Egi、Megumi Umemura、Takuya Kawai、Shuji Akai
DOI:10.1002/anie.201106381
日期:2011.12.16
An EZ switch: The cationic species of the heteropoly compounds has a critical impact on the Z/E selectivity of the Meyer–Schuster rearrangement of propargyl alcohols (see scheme). The isolation of the thermodynamically unfavorable Z‐α,β‐unsaturated carbonyl compounds is notable. The high Z selectivities were obtained at a reaction temperature as high as 50 °C.
一个 EZ 开关:杂多化合物的阳离子物质对一个临界冲击ž / é炔丙基醇的迈耶-舒斯特重排反应的选择性(见方案)。分离出热力学上不利的Z -α,β-不饱和羰基化合物。在高达 50°C的反应温度下可获得较高的Z选择性。