Studies into the Diels–Alder reactions of 5-trimethylsilylthebaine
作者:Weibin Chen、Gary D. Strahan、Damon A. Parrish、Jeffrey R. Deschamps、Andrew Coop
DOI:10.1016/j.tetlet.2004.11.010
日期:2005.1
The introduction of a 5-trimethylsilyl group on the least hindered face of the diene thebaine was anticipated to favor attack by dienophiles front the alternate face, but only gave rise to a rearrangement product when treated with 3-butene-2-one at 110degreesC. Reaction with the more reactive benzoquinone at lower temperature gave rise to a very slow reaction from the same face as the silyl group, indicating that a trimethylsilyl group does not sufficiently hinder this face to achieve reaction at the other face. (C) 2004 Elsevier Ltd. All rights reserved.