Cerium(III) Chloride Catalyzed Michael Reaction of 1,3-Dicarbonyl Compounds and Enones in the Presence of Sodium Iodide Under Solvent-Free Conditions
作者:Giuseppe Bartoli、Marcella Bosco、Maria Cristina Bellucci、Enrico Marcantoni、Letizia Sambri、Elisabetta Torregiani
DOI:10.1002/(sici)1099-0690(199903)1999:3<617::aid-ejoc617>3.0.co;2-r
日期:1999.3
Cerium(III) chloride heptahydrate in the presence of sodium iodide catalyses the Michael addition of 1,3-dicarbonyl compounds to α,β-unsaturated ketones and α,β-unsaturated aldehydes with extraordinary efficiency. The very mild conditions allow high chemoselectivity as shown by the absence of the typical side reactions, which can be observed in the conventional base-catalyzed processes. More interestingly
在碘化钠存在下,氯化铈 (III) 七水合物以非凡的效率催化 1,3-二羰基化合物与 α,β-不饱和酮和 α,β-不饱和醛的迈克尔加成反应。非常温和的条件允许高化学选择性,如不存在典型副反应所示,这可以在常规碱催化过程中观察到。更有趣的是,当至少一种原料在室温下为液体时,反应也可以在没有溶剂的情况下进行。CeCl3·7 H2O/NaI 催化剂体系可以很容易地从反应混合物中分离出来,并且可以重复使用而不会明显损失活性。讨论了本程序的优点,它使用了便宜且“友好”的试剂,而不是以前报道的试剂。