A New Zincate-Mediated Rearrangement Reaction of 2-(1-Hydroxyalkyl)-1-alkylcyclopropanol
作者:Kenichi Nomura、Seijiro Matsubara
DOI:10.1002/chem.200901054
日期:2010.1.11
A novel rearrangement of 2‐(1‐hydroxyalkyl)‐1‐alkylcyclopropanol has been found. It proceeds in the presence of a catalytic amount of organozinc ate complex to give vic‐diols. The rearrangement can be applied to various types of 2‐(1‐hydroxyalkyl)‐1‐alkylcyclopropanol, which can be easily prepared from the corresponding α,β‐epoxyketones and bis(iodozincio)methane. When bicyclo[13.1.0]pentadecane‐1
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
An Expedient Radical Approach for the Decarboxylative Synthesis of Stereodefined All‐Carbon Tetrasubstituted Olefins
作者:Qian Zeng、Yamini Nirwan、Jordi Benet‐Buchholz、Arjan W. Kleij
DOI:10.1002/anie.202403651
日期:2024.6.21
A radical-based, photo-catalyzed decarboxylative formation of stereodefined tri- and tetrasubstitutedolefins is reported using various α-amino radical precursors and heterocycles as substrates. This user-friendly protocol combines a wide structural scope, easy drug and postsynthetic manipulations, and variation in both reaction partners. The mechanistic studies reveal a key CO2 extrusion step to enable