脱氢苯与烃基氯硼酸酯的反应

脱氢苯与烃基氯硼酸酯的反应 REACTION OF BENZYNE WITH CHIOROBORONATES 董世华 first-author 张国敏 刘家俊 曾昭掄 <正> 作者曾利用脱氢苯分别与有机硼化合物、有机汞、锡化合物及有机磷化合物的作用,制得了相应的取代苯基硼、汞、锡及磷的有机化合物。本文作者企图通过氟苯与苯基锂的乙醚溶液在—70±5℃时起作用所形成的脱氢苯,与等克分子烃基氯硼酸正丁酯在低温下起作用来制备隣氯苯基烃基硼酸正丁酯,其产物经元素分析证明没有得到B—Cl键的加成产物,而只离析出一对Б—OR键的加成产物,即烷氧苯基烃基硼酸正丁酯,它们互为异构体（见表1）。 Benzyne reacts with n-propyl-or n-butyl-chloronate as follows:（R=n-C 3 H 7 or n-C 4 H 9 R’=n-C 4 H 9 ）Both ο-and ρ-isomers are obtained, This seems to be the first reposed example of benzyne addition directad to the para position. When benzyne and the chloroboronate are used in the molar ratio of 2:1 : these products as well as the borinate C 6 H 6 B（R）OR’ are obtained.On the other hand, when benzyne reacts with n-butyl phenylboronate, phenylboronate （C 6 H 5 B （OR’） 2 ） is the main product （after hydrolysis and re-esterification） when the reactants are used in the molal ratio of 1:1 : and dipnenyl boronate [（C 6 H 5 ） 2 B-OR’] is the main product when ratio used is 2:1. 1965-01-01 2021-04-01 Z1