Regioselective N1- or N2-modification of benzotriazoles with iodonium salts in the presence of copper compounds
作者:Dmitry V. Davydov、Vladimir V. Chernyshev、Victor B. Rybakov、Yurii F. Oprunenko、Irina P. Beletskaya
DOI:10.1016/j.mencom.2018.05.019
日期:2018.5
Modification of benzotriazoles with iodonium salts [diphenyl- and ( E )-styrylphenyliodonium tosylates] occurs at the N 1 -position in the presence of K 2 CO 3 as a base and CuI as a catalyst in CH 2 Cl 2 , whereas in the presence of stoichiometric amount of [Cu 2 (TMEDA) 2 (OH) 2 ]Cl 2 complex regioselective N 2 -modification proceeds. Two new Cu I complexes based on benzotriazoles were synthesized
Reported is the condensation between o‐arylenediamines and nitroarenes enabled by a cooperative action of acid and base, providing a direct entry to 2‐aryl‐2H‐benzotriazoles. The potential practicability of this methodology was demonstrated by 100 mmol‐scale reactions and the synthesis of serotonin/dopamine receptor ligand and human growth hormone.