Efficient Organocatalytic Dual Activation Strategy for Preparing the Versatile Synthons (2E)-1-(Het)Aryl/styryl-3-(dimethylamino)prop-2-en-1-ones and α-(E)-[(Dimethylamino)methylene]cycloalkanones
A novel organocatalytic dual activation strategy is reported for an efficient synthesis of the versatile synthons (2E)-1-aryl/heteroaryl/styryl-3-(dimethylamino)prop-2-en-1-ones and α-(E)-[(dimethylamino)methylene]cycloalkanones. 2-Guanidinoacetic acid (10 mol%) serves as an ambifunctional organocatalyst for the reaction of various aryl/heteroaryl/styryl methyl ketones and cyclic ketones having an
<scp>L</scp>-Proline-Catalyzed Activation of Methyl Ketones or Active Methylene Compounds and DMF-DMA for Syntheses of (2<i>E</i>)-3-Dimethylamino-2- propen-1-ones
作者:Dinesh Kumar、Damodara N. Kommi、Pradeep Chopra、Md Imam Ansari、Asit K. Chakraborti
DOI:10.1002/ejoc.201200778
日期:2012.11
place in the reaction of methylketones or active methylene compounds with DMF-DMA (N,N-dimethylformamide dimethyl acetal). L-Proline serves as an efficient organocatalyst in the covalent and noncovalent synchronous mode for the ambiphilic activation of various aryl, heteroaryl, and styryl methylketones, cyclic ketones, and 1,3-diketones with DMF-DMA to achieve the convenient syntheses of the versatile