作者:Éric Godin、Jeffrey Santandrea、Antoine Caron、Shawn K. Collins
DOI:10.1021/acs.orglett.0c02004
日期:2020.8.7
enabling the use of aryl-, alkyl-, and silyl-substituted alkynyl coupling partners (38 total examples, 50–99% yields). Importantly, the method enables the preparation of difficult-to-access bis-heteroatom-functionalized (S,S-, S,P-, and S,N-) alkynes.
Palladium-Catalyzed Alkynylative Lactonization of Unsaturated Bicyclic Carboxylic Acids: Synthesis of Fused Polycyclic γ-Lactone Compounds
作者:Ning Sun、Yibiao Li、Gengming Yin、Shaohua Jiang
DOI:10.1002/ejoc.201300037
日期:2013.5
Unsaturated bicyclic carboxylicacids undergo palladium-catalyzed coupling with bromoalkynes to produce γ-alkynyl lactones in moderate to good yields with excellent chemo- and regioselectivity. The reaction conditions were extremely mild, and functional groups such as methyl, methoxy, chloro, and bromo were tolerated under the optimized reaction conditions. Moreover, γ-chloroalkenyl lactones were facilely
Gold-Catalyzed Hydration of Haloalkynes to α-Halomethyl Ketones
作者:Longyong Xie、Yundong Wu、Weiguo Yi、Lei Zhu、Jiannan Xiang、Weimin He
DOI:10.1021/jo401437w
日期:2013.9.20
A general atom-economical approach for the synthesis of alpha-halomethyl ketones is demonstrated through hydration of a wide range of haloalkynes. Other outstanding features include excellent yields from both alkyl- and aryl-substituted haloalkynes and wide functional group tolerance. This protocol is an alternative to conventional alpha-halogenation of ketones.