W. Hanefeld et al., NITROSATION OF DERIVATIVES OF HYDRAZINES .8. NOVEL OXIDATIVE C-N-COUPLING OF INDAZOLES AND BENZOTRIAZOLES WITH CYCLIC ETHERS, Archiv der pharmazie, 326(4), 1993, pp. 203-207
Allopurinol, nitroindazoles and 5-nitrobenzotriazoles react with cycli
c ethers under oxidation with nitrosyl-tetrafluoroborate or 2,3-dichlo
ro-5,6-dicyanobenzoquinone yielding C-N-coupled products.