Palladium-catalyzed aerobic oxidative coupling of enantioenriched primary allylic amines with sulfonyl hydrazides leading to optically active allylic sulfones
A range of highly enantioenriched primary allylic amines underwent palladium-catalyzed oxidative coupling with sulfonyl hydrazides open to air at room temperature to give structurally diverse allylic sulfones in moderate to excellent yields with excellent retention of ee.
A conversion of o-phenylenediamines into benzotriazoles was achieved at room temperature using tert-butyl nitrite. The optimized conditions are also well suited for the transformation of sulfonyl and acyl hydrazines into corresponding azides. This protocol does not require any catalyst or acidic medium. The desired products were obtained in excellent yields in a short span of time.
Oxysulfonylation of Alkenes with Sulfonyl Hydrazides under Transition-Metal-Free Conditions
作者:Congrong Liu、Lianghui Ding、Guang Guo、Weiwei Liu
DOI:10.1002/ejoc.201501613
日期:2016.2
A novel method to synthesise β-keto sulfones is demonstrated by Bronsted acid promoted oxysulfonylation of alkenes with sulfonyl hydrazides under transition-metal-free conditions. The reaction selectively affords structurally diverse β-keto sulfones in good to excellent yields in a 9:1 mixture of acetonitrile/water.
Palladium-catalyzed direct arylation of indoles with arylsulfonyl hydrazides
作者:Congrong Liu、Lianghui Ding、Guang Guo、Weiwei Liu、Fu-Lai Yang
DOI:10.1039/c5ob02569a
日期:——
A novel method to synthesise 2-arylindoles is demonstrated via directarylation of indoles with arylsulfonyl hydrazides. Under the optimized reaction conditions, the reaction well tolerates a wide variety of functional groups to afford structurally diverse 2-arylindoles in good to excellent yields at 70 °C.
Synthesis of sulfone derivatives via palladium-catalyzed cross-coupling of benzyl trimethylammonium triflates and sulfonyl hydrazides
作者:Juelin Wan、Weijie Yu、Tao Wang、Jin Luo
DOI:10.1080/10426507.2021.2016758
日期:2022.7.3
Abstract A palladium-catalyzedcross-coupling of benzyl trimethylammonium triflates and sulfonyl hydrazides for the synthesis of various benzyl sulfones is reported. This novel protocol shows widespread functional group tolerance, leading to the desired sulfones in moderate to excellent yields.