Diallylsilanes can be made to rearrange upon treatment with I2. Of the silanes tested, diallyldiphenylsilane showed the greatest propensity to undergo this intramolecular carbocation allylation process. After etherification of the initially formed iodosilane, the products from this transformation represent useful synthetic intermediates, suitable for alkylation and cross-metathesis/annulation reactions
Noncatalyzed Stereoselective Allylation of Carbonyl Compounds with Allylsilacyclobutanes
作者:Kozo Matsumoto、Koichiro Oshima、Kiitiro Utimoto
DOI:10.1021/jo00102a052
日期:1994.11
Chemoselective Carbonyl Allylations with Alkoxyallylsiletanes
作者:Paul Spaltenstein、Elizabeth J. Cummins、Kelly-Marie Yokuda、Tim Kowalczyk、Timothy B. Clark、Gregory W. O’Neil
DOI:10.1021/acs.joc.8b03028
日期:2019.4.5
include salicylaldehydes and glyoxylic acids. Chemoselectivity in these reactions is thought to arise from a mechanism involving first exchange of the alkyoxy group on silicon with a substrate hydroxyl followed by activation of a nearby carbonyl by the Lewis acidic siletane and intramolecular allylation. In this way, substrates containing multiple reactive carbonyl groups (e.g., dialdehyde or triketone) can