Benzotriazole 2-phenyl-5-nitro

Mononitrohydroxybenzophenyltriazole, C, 2HgN4 03 mw 256.22, N 21.87%. One isomer 2-phenyl--nitro-5 hydroxy-benzotriazole is described in Beil 26,)30)... 

The structure of 5,7-dimtro-l-picrylbenzotriazole has been determined by singlecrystal X-ray crystallography [216], The nitro groups on C5, Cl and Cpara are practically coplanar with their aromatic cycles, while those on two Cortho atoms are rotated out of the plane of phenyl ring by approximately 50 and 21°. The phenyl and benzotriazole cycles of the molecule are twisted out of coplanarity by rotation about the Nl-C bond. The four torsion angles about this bond deviate from planar... 

NR - NHj/ RONa) lH-Benzotriazol 1-Ethoxycarbonyl-E4, 155 (Cl - OC2H5) Essigsaure Azido-phenyl- -me-thylester E5, 668 (OH - OR) lmidazol 2-(3-Nitro-phenyl)-4,5-dihydro- E16d, 286 (Nitrierung) IH-Indazol 3-Methylaminocarbony-loxy- E8b, 835 (OH > O CO-NH-R)... 

Phenyl azide can yield benzotriazole on irradiation , but more generally products of self-insertion or of attack on the solvent are found to lead to azepines and related compounds " - . Photolysis of o-azidobiphenyls formed carbazoles by intramolecular cyclization similar to that found in thermolysis and an analogous intramolecular cyclization involving, e.g. a nitro group could occur (reaction 74) in direct photolysis but not apparently in photosensitized reactions when only azobiphenyl was formed in appreciable yield The... 

Beim Bestrahlen von l-(2-Nitro-pheny])- bzw. l-(2,4-Dinitro-phenyl)-lH-pyrazolen(253,7 nm, 300nm und 355 nm) werden 2-(2-Acyl-ethenyl)-benzotriazol-l-oxide als (.E/Z)-Isome-ren-Gemische gebildet z. B2363 ... 

The VNS is the reaction of choice for incorporation of a-sulfonylalkyl substituents into nitroarenes and their heteroanalogues. Particularly accessible and useful are nitroarylmethyl phenyl sulfones and their heteroanalogues that are efficiently produced in the VNS reactions of carbanions of chloromethyl aryl sulfones with a great variety of nitroarenes and nitroheteroarenes. Nitro derivatives of heterocycles, such as pyrrole [54,55], furan [54], thiophene [54], imidazole [106, 112, 113], pyrazole [114], pyridine [57], indole [115], indazole [116, 117], benzimidazole [118], benzotriazole [119], benzofuroxan [120], quinoline [121], and porphyrins [122, 123], have been shown to enter this reaction. 

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