Noncryogenic Preparation of Functionalized Arylboronic Esters through a Magnesium−Iodine Exchange with in Situ Quench
作者:Emilien Demory、Véronique Blandin、Jacques Einhorn、Pierre Y. Chavant
DOI:10.1021/op2000089
日期:2011.5.20
Various functionalized aryl boronic esters derived from hexylene glycol and pinacol were prepared in excellent yields according to a simple, safe procedure. The metal−halogen exchange reaction between iPrMgCl·LiCl and aryl iodides is performed at 0 °C in the presence of a cyclic borate ester (MPBOiPr or PinBOiPr); the organomagnesium intermediate is immediately trapped in situ so that no accumulation
根据简单,安全的方法,以极高的收率制备了衍生自己二醇和频哪醇的各种官能化芳基硼酸酯。之间的金属-卤素交换反应我PrMgCl·LiCl和芳基碘在0℃下,在环状硼酸酯(MPBO的存在下进行我镨或拼博我PR); 有机镁中间体立即被原位捕获,因此不会发生有害反应性物质的积累。该反应是非常选择性的,并且获得特别清洁的粗产物。研究了程序的范围和反应参数的调整。