Phosphine-Mediated Regio- and Stereoselective Hydrocarboxylation of Enynes
摘要:
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.
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
An organocatalyticasymmetricformal [3 + 2] cycloaddition of enynones with N-hydroxylamines has been described. A newly designed multifunctional organocatalyst was found to be highly effective, and the method allowed the synthesis of a variety of 2,3-dihydroisoxazoles in good yields with excellent enantioselectivity.