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.
Dondoni A., Merchan F. L., Merino P., Tejero T., Synth. Commun, 24 (1994) N 18, S 2551-2555
作者:Dondoni A., Merchan F. L., Merino P., Tejero T.
DOI:——
日期:——
Formaldehyde as Tethering Organocatalyst: Highly Diastereoselective Hydroaminations of Allylic Amines
作者:Colin R. Hesp、Melissa J. MacDonald、M. Mehdi Zahedi、Didier A. Bilodeau、Shu-Bin Zhao、Marc Pesant、André M. Beauchemin
DOI:10.1021/acs.orglett.5b02675
日期:2015.10.16
Catalysts possessing sufficient activity to achieve intermolecular alkene hydroaminations under mild conditions are rare, and this likely accounts for the scarcity of asymmetric variants of this reaction. Herein, highly diastereoselective hydroaminations of allylicamines utilizing hydroxylamines as reagents and formaldehyde as catalyst are reported. This catalyst induces temporary intramolecularity