A CONVENIENT SYNTHESIS OF NEW 1-ALKYNYL-1H-BENZOTRIAZOLES BY REACTION OF ALKYNYL(PHENYL)IODONIUM SALTS WITH BENZOTRIAZOLE ION

摘要

The reaction of arylethynyl(phenyl)iodonium tosylates with benzotriazole ion gave new 1-alkynyl-1H-benzotriazoles in good yields. This result indicates that alkynyliodonium salts can be used for direct alkynylation of benzotriazole. However,the similar reactions of (tertbutylethynyl)(phenyl)iodonium and 1-octynyl (phenyl)iodonium tosylates do not afford the 1-alkynyl-1H-benzotriazoles but alkenylbenzotriazoles via the reaction of alkylidenecarbenes.