Heteropentalenes. The Oxidation of Pyrazolobenzotriazoles
The dye-sensitized photo-oxidation of 1,3-dimethylpyrazolobenzotriazole (3) affords 4-benzotriazol-1-yl-3,4-epoxypentan-2-one (5) and 4-benzotriazol-1-ylpent-3-en-2-one (6), as well as the corresponding benzotriazol-2-yl derivatives (7) and (8), in
DIMETHYLBENZOPYRAZOLOTRIAZOLE vs METHYLPYRAZOLOQUINOXALINE FROM 3,5-DIMETHYL-1-(2-NITRENOPHENYL)PYRAZOLE
The chemistry of singlet and triplet 3,5-dimethyl-1-(2-nitrenophenyl)pyrazole is examined.Intramolecular electron transfer is found to play a key role in determining the easy reaction to the ylide (VII) from the singlet state and the "lazyness" of the triplet state.
Albini, Angelo,Bettinetti, Gian Franco,Minoli, Giovanna
p. 331 - 334
(2007/10/02)
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