A domino process involving Michael addition and carbocyclization has been developed starting from beta-N-allylamino enoates and various organometallic reagents (organozinc halides, diorganozinc reagents, and copper/zinc mixed species). In all cases the mechanism of this dominoreaction has been evidenced to involve a radical-polarcrossover mechanism.
Stereoselective synthesis of imidazolidin-2-ones via Pd-catalyzed alkene carboamination. Scope and limitations
作者:Jonathan A. Fritz、John P. Wolfe
DOI:10.1016/j.tet.2008.04.015
日期:2008.7
alkenyl bromides via Pd-catalyzed carboamination reactions is described. The N-allylurea precursors are prepared in one step from readily available allylic amines and isocyanates, and the Pd-catalyzed reactions effect the formation of a C-C bond, a C-N bond, and up to two stereocenters in a single step. Good diastereoselectivities are obtained for the conversion of substrates bearing allylic substituents
Palladium-Catalyzed Oxidative Carbonylation of<i>N</i>-Allylamines for the Synthesis of β-Lactams
作者:Wu Li、Chao Liu、Heng Zhang、Keyin Ye、Guanghui Zhang、Wangzheng Zhang、Zhengli Duan、Shuli You、Aiwen Lei
DOI:10.1002/anie.201309081
日期:2014.2.24
β‐Lactam scaffolds are considered to be ideal building blocks for the synthesis of nitrogen‐containing compounds. A new palladium‐catalyzedoxidativecarbonylation of N‐allylamines for the synthesis of α‐methylene‐β‐lactams is reported. DFT calculations suggest that the formation of β‐lactams via a four‐membered‐ring transition state is favorable.