1,2-Acyl migration from β-acyl-γ-trimethylsilyl carbenium ion
作者:Douniazad El Abed、Christiane Santelli-Rouvier、Maurice Santelli
DOI:10.1016/s0040-4020(01)87923-0
日期:1990.1
TiCl4 induced rearrangement of α-allyl α'-vinylβ-trimethylsilyl ketones 3c,d,c,g leads to rearrangedα-allyl α'-vinyl ketones 4c, d, e or 2-vinylcyclopentanone 9 resulting of an acyl shift with silyl control.
and efficient multicomponent reaction involving a double-allylation sequence is reported. In situ generated bimetallic reagents are prepared from disilane 1 and added onto a range of aliphatic aldehydes to afford a direct access to trisubstituted tetrahydrofurans in good to excellent diastereoselectivity (up to 70%).