Deprotonative lithiation of various 6-butyl-2-(dihalophenyl)-(N–B)-1,3,6,2-dioxazaborocanes (N-butyldiethanolamine esters of dihalophenylboronic acids) was investigated. It was found that selective transformations can be best achieved by use of LDA as the lithiating reagent. The reactivities of these compounds vary significantly, depending on the natures and positions of the halogen atoms. The resultant
研究了各种 6-丁基-2-(二卤代苯基)-(N-B)-1,3,6,2-二
恶唑硼烷(二卤代苯基
硼酸的
N-丁基二乙醇胺酯)的去质子
锂化。发现使用
LDA作为
锂化试剂可以最好地实现选择性转化。这些化合物的反应性变化很大,这取决于卤原子的性质和位置。所得
硼-
锂双
金属中间体与亲电试剂反应,得到官能化卤化芳基
硼酸。(© Wiley-
VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)