title: The photochemistry of benzotriazole derivatives. Part 2: photolysis of 1-substituted benzotriazole arylhydrazones: new route to phenanthridin-6-yl-2-phenyldiazines.
abstract: Irradiation of 1-substituted benzotriazole arylhydrazones 3a-c, 4a,b and 5a,b with a 16 W low pressure mercury arc-lamp (254 nm) for 24 h gave phenanthridin-6-yl-2-phenyldiazines 9a-c, phenanthridin-6(5H)-ones 10a-c, 1-anilinobenzimidazoles 11a-c,  2-aryl-1H-benzimidazoles 12a-c, 1-arylamino-1H-benzimidazol-2-carboxylic acid ethyl esters 14a,b, 1-aryl-1H, 9H-benzo [4,5][1,2,3] triazolo[1,2-a]tetrazole-3-carboxylic acid ethyl esters 16a,b, 1-arylamino-2-benzoylbenzimidazoles 18a,b and 2-benzoylbenzoxazole 21.
authors.affiliation: Department of Chemistry, Faculty of Science, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait. nader.aljalal@ku.edu.kw
authors.forename: Nader A
authors.initials: NA
authors.lastname: Al-Jalal
authors.forename: Maher R
authors.initials: MR
authors.lastname: Ibrahim
authors.forename: Nouria A
authors.initials: NA
authors.lastname: Al-Awadi
authors.forename: Mohamed H
authors.initials: MH
authors.lastname: Elnagdi
mesh_terms: D018360:Crystallography, X-Ray; D006835:Hydrazones / Q000737:chemistry*; D008968:Molecular Conformation; D010617:Phenanthridines / Q000138:chemical synthesis* / Q000737:chemistry*; D010782:Photolysis; D014230:Triazoles / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D006835:Hydrazones; D010617:Phenanthridines; D014230:Triazoles; C012771:benzotriazole