Abstract
1-(2,2-Dichlorovinyl)benzotriazole (
7
) was prepared by the reaction of 1-formylbenzotriazole with PPh
3/CCl
4. Lithiation–substitution of
7
with electrophiles gave a variety of functionalized
N-(ethynyl)benzotriazoles
8a–
h
in 32–84% yields.
Graphical Abstract