Phosphine-Catalyzed Regioselective and Stereoselective Hydrohalogenation Reaction of 2-(1-Alkynyl)-2-alken-1-ones: Synthesis of 2-Halo-1,3-dienes
作者:Wenbo Li、Lihua Gao、Zhenting Yue、Junliang Zhang
DOI:10.1002/adsc.201500408
日期:2015.8.24
A triphenylphosphine (PPh3)‐catalyzed, regioselective and stereoselective hydrohalogenation reaction of 2‐(1‐alkynyl)‐2‐alken‐1‐ones with metal halides in the presence of acetic acid is described, furnishing functionalized 3,4‐disubstituted 2‐halo‐1,3‐dienes in moderate to good yields with high stereoselectivity and regiospecificity. The simple execution, mild conditions and the potential utilization
Synthesis of 2-Tetrazolyl-Substituted 3-Acylpyrroles via a Sequential Ugi-Azide/Ag-Catalyzed Oxidative Cycloisomerization Reaction
作者:Han-Han Kong、Hong-Ling Pan、Ming-Wu Ding
DOI:10.1021/acs.joc.8b01984
日期:2018.10.19
cascade cycloisomerization/aerobic oxidation reaction of a Ugi-azide adduct for the preparation of 3-acylpyrroles using molecular oxygen as the terminal oxidant has been developed. A series of 2-tetrazolyl-substituted 3-acylpyrroles were obtained in 62–89% yields from readily available enynals 1, primaryamines2, isocyanides 3, and trimethylsilyl azide 4 in the presence of a catalytic amount of AgNO3 and
Phosphine-Mediated Regio- and Stereoselective Hydrocarboxylation of Enynes
作者:Wenbo Li、Junliang Zhang
DOI:10.1021/ol4031556
日期:2014.1.3
A phosphine-mediated regio- and stereoselective addition reaction of diverse nucleophiles to yne-enones leading to polysubstituted 1,3-diene scaffolds in moderate to good yields has been reported.