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。