Dramatic Rate Acceleration of the Baylis−Hillman Reaction in Homogeneous Medium in the Presence of Water
作者:Juexiao Cai、Zhenghong Zhou、Guofeng Zhao、Chuchi Tang
DOI:10.1021/ol027197f
日期:2002.12.1
[reaction: see text] In homogeneous H(2)O/solvent medium, the reaction rate of aromatic aldehydes and acrylonitrile or acrylate was greatly accelerated, which led to shorter reaction time, lower reaction temperature, and higher yield. In this reaction, Me(3)N, DMAP, DABCO, and urotropine were good catalysts. Except for low-carbon alcohols, tetrahydrofuran, 1,4-dioxane, and acetonitrile could be chosen
[反应:见正文]在均相H(2)O /溶剂介质中,芳族醛与丙烯腈或丙烯酸酯的反应速率大大提高,导致反应时间更短,反应温度更低,产率更高。在该反应中,Me(3)N,DMAP,DABCO和乌罗托品是良好的催化剂。除低碳醇外,可以选择四氢呋喃,1,4-二恶烷和乙腈作为溶剂。在此条件下,硝基苯甲醛与丙烯酸L-薄荷基酯的非对映选择性反应的de-为88-99%。