91322-02-0Relevant articles and documents
Triazolo[4,5-d]pyrimidines. X. Halogen-metal exchange reaction of 7-halo-3-phenyl-3H-1,2,3-triazolo[4,5-d)pyrimidines with butyllithium
Tanji,Kato,Higashino
, p. 2793 - 2796 (2007/10/02)
The amino group at the 7-position on the 3H-1,2,3-triazolo[4,5-d]pyrimidine ring was converted into halogen atoms by treatment with isopentyl nitrite in halomethanes, in satisfactory yields. The halogen-metal exchange reaction between 7-iodo-3-phenyl-3H-1
Studies on Pyrazolopyrimidine Derivatives. XVI. Preparation of Reissert Compounds from Condensed Pyrimidine Systems Catalyzed by Lewis Acids
Higashino, Takeo,Sato, Susumu,Miyashita, Akira,Katori, Tatsuhiko
, p. 4803 - 4812 (2007/10/02)
Among various Lewis acids, aluminium chloride (AlCl3) was the most effective catalyst for the formation of the Reissert compound (21a,5-benzoyl-4,5-dihydro-1-phenyl-1H-pyrazolo-pyrimidine-4-carbonitrile) of 1-phenyl-1H-pyrazolopyr