Gold(I)-Catalyzed Highly Regio- and Stereoselective Decarboxylative Amination of Allylic <i>N</i>-Tosylcarbamates via Base-Induced Aza-Claisen Rearrangement in Water
作者:Dong Xing、Dan Yang
DOI:10.1021/ol100056f
日期:2010.3.5
A gold(I)-catalyzed decarboxylative amination of allylic N-tosylcarbamates via base-induced aza-Claisen rearrangement has been developed. A variety of substituted N-tosyl allylic amines were obtained in good yield, excellent regioselectivity, and high to excellent stereoselectivity. This transformation could be performed either in H2O or in one pot directly from allylic alcohols and therefore represents
申请人:UNIVERSITY COURT OF THE UNIVERSITY OF ST ANDREWS
公开号:US20140228563A1
公开(公告)日:2014-08-14
Cis and trans ruthenium complexes that can be used as catalysts for ring opening metathesis polymerisation (ROMP) are described. The complexes are generally square pyramidal in nature, having two anionic ligands X. Corresponding cationic complexes where one or both of the anionic ligands X are replaced by a non-co-ordinating anionic ligand are also described. Polymers such as polydicyclopentadiene (PDCPD) can be prepared using the catalysts.
A Facile Highly Regio- and Stereoselective Preparation of <i>N</i>-Tosyl Allylic Amines from Allylic Alcohols and Tosyl Isocyanate via Palladium(II)-Catalyzed Aminopalladation−β-Heteroatom Elimination
作者:Aiwen Lei、Xiyan Lu
DOI:10.1021/ol006130u
日期:2000.7.1
The high regio- and stereoselectivity have been obtained from the allylic substitution reaction catalyzed by palladium(II) species. From allylic alcohols, one-pot reaction with tosyl isocyanate followed by palladium(II)-catalyzed allylic substitution gives N-tosyl (E)-allylic amines in high yield. The substitution occurs only at the gamma-position of the 1- or 3-substituted allylic alcohols.
Tetraselenotungstate 1 reacts with simple (N-tosylaziridinyl)-methyl tosylate derivatives to give allylamine derivatives as the only products by an unprecedented selena-aza-Paynetype rearrangement. When the methodology is extended to disubstituted (N-tosylaziridinyl)methyl tosylates, regio- and stereospecific ring-opening of the aziridines occurs to afford allylamine derivatives as the major products
Selectivity aspects of the ring opening reaction of 2-alkenyl aziridines by carbon nucleophiles
作者:Rodrigo L.O.R. Cunha、Dennis G. Diego、Fábio Simonelli、João V. Comasseto
DOI:10.1016/j.tetlet.2005.02.089
日期:2005.4
A series of common organometallic reagents were used in the reaction with an acyclic and a cyclic activated 2-alkenyl aziridines and the selectivity aspects for each aziridine was addressed.