Stereoselective synthesis of sulfonyl-substituted trans-2,3-dihydrofuran derivatives via reaction of arsonium Ylides with α,β-unsaturated ketones
Long Cao , Xiaohong Zhou , Jie Chen , Hui Zhang , Hongmei Deng , Min Shao , Mark C. McMills , Weiguo Cao
Chemical Research in Chinese Universities ›› 2014, Vol. 30 ›› Issue (4) : 596 -600.
Stereoselective synthesis of sulfonyl-substituted trans-2,3-dihydrofuran derivatives via reaction of arsonium Ylides with α,β-unsaturated ketones
Trans-2,3-dihydrofuran derivatives 3 or 4 substituted with a sulfonyl group were prepared with high chemoselectivity and good yields by [1+4]-addition reaction of α,β-unsaturated ketones 1 with arsonium bromide 2 in CH2Cl2 in the presence of potassium carbonate at room temperature. The structures of the products were characterized by IR, MS, 1H NMR, elemental analysis and single crystal X-ray diffraction analysis. A mechanism for the formation of products was also proposed.
Stereoselectivity / Dihydrofuran / Arsonium Ylide
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