Ti(IV) promoted 1, 3-dipolar cycloaddition of nitrones to vinyl ethers
作者:Pau Bayo´n、Pedro de March、Marta Figueredo、Josep Font
DOI:10.1016/s0040-4020(98)00983-1
日期:1998.12
The 1, 3-dipolar cycloaddition of nitrones to vinylethers is accelerated by Ti(IV) species. The efficiency of the catalyst parallels its complexation capacity. The use of Ti(iPrO)2Cl2 favours the formation of trans cycloadducts, presumably through an endo bidentate complex, in which the metal atom is simultaneously coordinated to the vinylether and to the cyclic nitrone or the Z isomer of the acyclic