新的二苯并环状溴鎓盐的合成及性质研究

Studies on Synthesis and Properties of Some New Dibenzocyclobromonium Salts

以４，４－二取代联苯（或４，４－二取代二苯甲烷）为原料合成了几种新的３，７－二取代二苯并环状溴盐．对几种溴盐与ＫＢＨ４及与ＮａＮ３的反应进行了研究．结果表明，前一反应主产物为２－溴－４，４－二取代联苯（或２－溴－４，４－二取代二苯甲烷），后一反应的主产物为２－叠氮基－２－溴－４，４－二取代联苯（２０ａ—２０ｄ）．通过２０ａ—２０ｄ的热反应合成几种新的多取代咔唑（２１ａ—２１ｄ）．

Some new 3,7 disubstituted dibenzocyclobromonium salts were synthesized from 4,4 disubstituted biphenyls(or 4,4 disubstituted diphenylmethane). The reactions of some 3,7 disubstituted dibenzocyclobromonium salts with both KBH 4 and NaN 3 were studied. The primary products were 2 bromo 4,4 disubstituted biphenyls(or 2 bromo 4,4 disubstituted diphenylmethane) and 2 azide 2 bromo 4,4 disubstituted biphenyls(20a_20d) respectively. Thermal reaction of compounds 20a—20d gave corresponding polysubstituted carbozoles(21a—20d).