作者:Y. Ogata、Y. Izawa、H. Tomioka、T. Ukigai
DOI:10.1016/s0040-4020(01)82754-x
日期:1969.1
boron tribromide followed by hydrolysis results in the formation of o- (12·7%) m- (7·5%), and p-tolueneboronic acids (54·8%) and a trace of ω-tolueneboronic acid. Ethylbenzene is similarly boronated to give o- (9·9%), m- (3·0%), and p-ethylbenzeneboronic acids (57·6%) together with α-(12·9%) and ω-ethylbenzeneboronic acids (2·6%). In the photoboronation of cumene, o- (1·9%), m- (4·5%), and p-cumeneboronic
甲苯与三溴化硼的光化学反应,然后水解,形成邻-(12·7%)m-(7·5%)和对甲苯硼酸(54·8%)以及少量的ω-甲苯硼酸。乙苯类似地硼化的,得到ø - (9·9%),米- (3·0%),和p -ethylbenzeneboronic酸(57·6%)一起α-(12·9%)和ω-ethylbenzeneboronic酸(2·6%)。在枯烯的光硼化中,o-(1·9%),m-(4·5%)和p获得了-枯烯硼酸(73·6%),但是没有检测到α-枯烯硼酸。环取代是优选的,其可以通过光化学激发烷基苯和三溴化硼之间的CT配合物而进行。通过涉及二溴硼基自由基(·BBr 2)的自由基方法同时获得少量的侧链硼化产物。