Concise synthesis of ketoallyl sulfones through an iron-catalyzed sequential four-component assembly
作者:Fuhong Xiao、Chao Liu、Dahan Wang、Huawen Huang、Guo-Jun Deng
DOI:10.1039/c7gc03719h
日期:——
A three starting material four component reaction (3SM-4CR) strategy is described to prepare β-acyl allylic sulfones from methyl ketones, sodium sulfinates and dimethylacetamide (DMA) in an iron-catalyzed oxidative system. In this process, DMA was used as a dual synthon to provide two carbons. A broad range of functional groups were tolerated in this reaction system.
A novel strategy for the synthesis of sulfonylated lactones via Ag-catalyzed radical addition/cyclization reaction of 1,6-enynes and sodium sulfinates has been developed. The reaction presents high stereoselectivity under mild conditions with C4 prochiral center construction in one step. The ESR experiments and relevant mechanistic studies indicated that a radical pathway should be involved in this
Copper(II) Acetate Mediated Synthesis of 3-Sulfonyl-2-aryl-2H-chromenes
作者:Meng-Yang Chang、Yu-Hsin Chen、Han-Yu Chen
DOI:10.1055/s-0039-1689973
日期:2019.9
two-step synthetic route, which includes (i) Cu(OAc)2/PyBOP-mediated intermolecular [4+2] annulation of substituted salicylic acids with β-sulfonylstyrenes in the presence of DMAP in refluxing DMF, and (ii) sequential O-alkylation of the resulting sulfonylflavanones with n-butyl bromide. A plausible mechanism is proposed and discussed. This protocol provides a highly effective annulation via one carbon–oxygen
作者:Meng-Yang Chang、Ming-Hao Wu、Chieh-Kai Chan、Shin-Ying Lin
DOI:10.1016/j.tetlet.2013.10.067
日期:2013.12
Synthesis of aryl biaryl sulfones 3 with good yields is described. The one-pot efficient synthetic route is carried by the NaH-mediated tandem [C3+C3] annulations of cinnamaldehydes 1 and propargylic sulfones 2 under the boiling THF conditions.