A variety of 1,2,4-benzotriazines and benzotriazoles are conveniently and divergently synthesized via selective N–N or N–S bond cleavage of 1-trifluoromethyl benzotriazoles under different basic conditions.
Herein, we developed a new methodology of using aryl sulfonium salts as the aryne precursor for [3 + 2] cycloaddition reactions with azides.
Ni-catalyzed cross-coupling of N-acyl benzotriazoles, oxiranes/oxetanes and trimethylsilyl halides afforded β- and γ-halo esters with good yields and wide substrate scope. Preliminary mechanistic studies point to a σ-bond metathesis pathway.
A mild and efficient visible-light promoted FeCl3-catalyzed reductive transamidation of N-acyl benzotriazoles with nitro compounds by PhSiH3 was developed.
A comprehensive review highlighting advances in the synthesis of N-acyl sulfonamides, including classical acylation techniques, transition-metal catalysis, and C–H functionalisation.