Palladium-Catalyzed Regioselective C-H Bond ortho-Acetoxylation of Arylpyrimidines
作者:Xiaojian Zheng、Bingrui Song、Bin Xu
DOI:10.1002/ejoc.201000631
日期:——
An efficient and regioselectivepalladium-catalyzed ortho C-H acetoxylation reaction was developed to afford ortho monoacetoxylated arylpyrimidines in good to excellent yields by using cupric trifluoroacetate as a cocatalyst. A wide variety of oxygenated arylpyrimidines were prepared with high regioselectivity and functional group tolerance.
Gold(III) or Gold(I)/Lewis-Acid-Catalyzed Substitution/Cyclization/1,2-Migration Reactions of Propargyl Alcohols with 3-Amino-benzo[<i>d</i>]isoxazoles: Synthesis of Pyrimidine Derivatives
作者:Ali Wang、Mingduo Lu、Xin Xie、Yuanhong Liu
DOI:10.1021/acs.orglett.2c01011
日期:2022.4.22
A straightforward synthesis of pyrimidines via Au(III) or Au(I)/Lewis-acid-catalyzed cascade reactions of propargylalcohols with 3-amino-benzo[d]isoxazoles is described. The propargyl amine intermediates are readily generated in situ via oxophilic activation of gold(III) or a Lewis acid, which undergo cyclization/1,2-group migration/aromatization to deliver the desired products. Highly selective 1