Lewis acid catalysed cyclisation and halogen exchange reactions of 1,1′-biphenyl-2-yl isocyanide dihalides
作者:Kevin S. Currie、George Tennant
DOI:10.1039/c39950002295
日期:——
dichloride and dibromide undergo unprecedented intramolecular Friedel–Crafts type cyclisation reactions catalysed by various Lewis acids affording useful synthetic methods for otherwise difficult to access 6-chloro- and 6-bromo-phenanthridines; nucleophilic displacement reactions of the latter and halogen exchange reactions of 1,1′-biphenyl-2-yl isocyanide dichloride and dibromide are also described.
1,1'-联苯-2-基异氰化物二氯化物和二溴化物经历了前所未有的分子内弗里德-克来福特类型的环化反应,该反应由各种路易斯酸催化,为其他难以获得的6-氯和6-溴-菲啶提供了有用的合成方法;还描述了后者的亲核取代反应和1,1'-联苯-2-基异氰化物二氯化物和二溴化物的卤素交换反应。