Divergent synthesis of N-heterocycles by Pd-catalyzed controllable cyclization of vinylethylene carbonates
作者:Yuwen Yang、Weibo Yang
DOI:10.1039/c8cc06945j
日期:——
Here, we report a palladium-catalyzed controllable cyclization of vinyl ethylene carbonates that proceeds through formal migration [2+3] and [5+2] cycloadditions, respectively, under mild conditions.
Palladium‐Catalyzed Decarboxylative Cycloaddition of Vinylethylene Carbonates with Formaldehyde: Enantioselective Construction of Tertiary Vinylglycols
An efficient method for the enantioselectiveconstruction of tertiaryvinylglycols through a palladium‐catalyzed asymmetric decarboxylativecycloaddition of vinylethylenecarbonates with formaldehyde was developed. By using a palladium complex generated in situ from [Pd2(dba)3]⋅CHCl3 and a phosphoramidite ligand as a catalyst under mild reaction conditions, the process allows conversion of racemic
Enzyme-catalysed approach to the preparation of triazole antifungals: synthesis of (−)-genaconazole
作者:Daniela Acetti、Elisabetta Brenna、Claudio Fuganti、Francesco G. Gatti、Stefano Serra
DOI:10.1016/j.tetasy.2009.09.024
日期:2009.10
The work describes a new enzyme-mediated approach to optically active epoxide (2R,3S)-6, which is an important key intermediate in the preparation of single enantiomers of chiral azole antifungals. The conversion of (2R,3S)-6 into (−)-genaconazole is reported as an example of its synthetic relevance.
Stereoselective Synthesis of Tri- and Tetrasubstituted Allylsilanes via Copper-Catalyzed Decarboxylative Silylation of Vinylethylene Carbonates
作者:Wenzhu Ren、Yifei Yan、Yinhua Huang
DOI:10.1021/acs.joc.3c01297
日期:2023.12.15
Herein, a stereoselective copper-catalyzed decarboxylative silylation of readily available vinylethylene carbonates (VECs) with PhMe2Si-Bpin is reported, affording a wide range of tri- and tetrasubstituted allylsilanes in moderate to highyields with E-selectivity. This protocol was characterized by highstereoselectivity, broad substrate scope, operational simplicity, and mild reaction conditions
A Palladium‐Catalyzed Regioselective [3+2] Annulation Strategy to 1,2,3‐Oxathiazolidine‐2‐oxides
作者:Qian Liang、Ganggang Bu、Hongjian Jiao、Bing Gao
DOI:10.1002/ejoc.202301153
日期:2024.3.25
Palladium-catalyzed [3+2] annulation of N-sulfinylanilines with vinylethylene carbonates and vinyl epoxides has been reported, affording the 1,2,3-oxathiazolidine-2-oxides under mild reaction conditions. Further synthetic applications of 1,2,3-oxathiazolidine-2-oxides in the preparation of sulfoxides, β-amino alcohols and amines have also been demonstrated.