carbinols is presented. High chemoselectivity is illustrated by the TiCl4‐Mg‐promoted selective coupling of CH2Br2 or CH2Cl2 with an aldehyde in the presence of ketone and selective transfer of CH2Br or CH2Cl to saturated carbonyl moiety. This protocol is also suitable for sterically hindered and enolizable carbonyl compounds.
提出了一种用于构建
溴甲基或
氯甲基
甲醇的有效方法。高
化学选择性通过的TiCl所示4 CH的-Mg促进的选择性耦合2
溴2或CH 2
氯2与酮和CH的选择性转移的存在下用醛2 Br或CH 2 CI至饱和羰基部分。该方案也适用于空间受阻和可烯醇化的羰基化合物。