Titanium(IV) Halide Mediated Coupling of Alkoxides and Alkynes: An Efficient and Stereoselective Route to Trisubstituted (<i>E</i>)-Alkenyl Halides
作者:Min-Liang Yao、Travis R. Quick、Zhongzhi Wu、Michael P. Quinn、George W. Kabalka
DOI:10.1021/ol900669t
日期:2009.6.18
Alkoxide C-O bond cleavage occurs readily at room temperature in the presence of titanium(IV) halide. Capture of the resultant carbocation by alkynes provides an efficient route to trisubstituted (E)-alkenyl halides with high stereoselectivity.
Substitution of Benzylic Hydroxyl Groups with Vinyl Moieties Using Vinylboron Dihalides
作者:George W. Kabalka、Min-Liang Yao、Scott Borella、Zhong-Zhi Wu
DOI:10.1021/ol050778v
日期:2005.7.1
[reaction: see text] Substitution of benzylic hydroxyl groups with vinyl moieties using vinylboron dihalides has been achieved. The reaction provides a novel method for preparing stereodefined alkenyl halides.