Synthesis of β-branched Morita–Baylis–Hillman-type adducts from 1,3-diaryl-2-propynyl trimethylsilyl ethers and aldehydes catalyzed by potassium tert-butoxide
作者:Kazuhiro Yoshizawa、Takayuki Shioiri
DOI:10.1016/j.tetlet.2005.11.118
日期:2006.1
1,3-Diaryl-2-propynyl trimethylsilyl ethers were easy to isomerize into the corresponding siloxyallenes using a catalytic amount of potassium tert-butoxide under very mild conditions. The siloxyallenes reacted in situ with various aldehydes to afford Z-selective β-branched Morita–Baylis–Hillman-type adducts in a one-pot reaction after acid treatment.
在非常温和的条件下,使用催化量的叔丁醇钾,很容易将1,3-二芳基-2-丙炔基三甲基甲硅烷基醚异构化成相应的甲硅烷氧基烯。硅氧丙二烯与各种醛原位反应,在酸处理后的一锅反应中提供Z选择性的β支化Morita–Baylis–Hillman型加合物。