FORMATION OF (2-AMINOPHENYL)-5-ETHOXY-4-METHYL-3-PHENYLPYRAZOLE AND 3-METHYL-2-PHENYLPYRAZOLO[5,1-B]BENZIMIDAZOLE VIA AN UNUSUAL BENZOTRIAZOLE RING-OPENING

Authors
KATRITZKY AR WANG ZQ LANG HY STEEL PJ
Citation
Ar. Katritzky et al., FORMATION OF (2-AMINOPHENYL)-5-ETHOXY-4-METHYL-3-PHENYLPYRAZOLE AND 3-METHYL-2-PHENYLPYRAZOLO[5,1-B]BENZIMIDAZOLE VIA AN UNUSUAL BENZOTRIAZOLE RING-OPENING, Himia geterocikliceskih soedinenij, (6), 1996, pp. 775-780
Citations number
14
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Himia geterocikliceskih soedinenij → ACNP
ISSN journal
01326244
Issue
6
Year of publication
1996
Pages
775 - 780
Database
ISI
SICI code
0132-6244(1996):6<775:FO(A3>2.0.ZU;2-F
Abstract
Successive treatment of N-[(1-ethoxy)alken-2-yl]benzotriazoles with bu tyllithium and trimethylchlorosilane in THF at -78 degrees C followed by refluxing in acidic acetone generated ring-opened (2-aminophenyl)-5 -ethoxy-4-methyl-3-phenylpyrazole (VIII) and 3-methyl-2-phenylpyrazolo [5,1-b]benzimidazole (IX).