Rh<sup>I</sup>
-Catalyzed Carbonylative [3+1] Construction of Cyclobutenones via C−C σ-Bond Activation of Cyclopropenes
作者:Wen-Bin Xu、Changkun Li、Jianbo Wang
DOI:10.1002/chem.201804170
日期:2018.10.22
With a catalytic amount of Rh(cod)2BF4 and dppm, cyclopropenes undergo a direct carbonylative [3+1] cycloaddition reaction under an atmosphere of CO to produce the cyclobutenones in excellent yields, in which the regio‐ and diastereoselectivities can be controlled in certain cases with the help of chelating groups. Cyclobutenone with a chiral 4‐position was prepared by diastereoselective induction
Divergent gold-catalysed reactions of cyclopropenylmethyl sulfonamides with tethered heteroaromatics
作者:Melanie A. Drew、Sebastian Arndt、Christopher Richardson、Matthias Rudolph、A. Stephen K. Hashmi、Christopher J. T. Hyland
DOI:10.1039/c9cc06241f
日期:——
Cyclopropenylmethyl sulfonamides with tethered heteroaromatics have been demonstrated to undergo divergent gold-catalysed cyclisation reactions. A formal dearomative (4+3) cycloaddition takes place with furan-tethered substrates, yielding densely functionalised 5,7-fused heterocycles related to the bioactive curcusone natural products. Indole-tethered substrates display divergent reactivity giving
Facially Selective and Regioselective Carbometalation of Cyclopropenes by Aryl Grignard Reagents
作者:Ni Yan、Xiaozhong Liu、Joseph M. Fox
DOI:10.1021/jo702176x
日期:2008.1.1
Described is a Cu-catalyzed methodology for adding aryl Grignard reagents to 3-hydroxymethylcyclo-propene derivatives with high regio- and diastereoselectivity. The cyclopropylmetals can be trapped with a variety of electrophiles to generate highly substituted cyclopropanes.