82341-99-9Relevant academic research and scientific papers
Competitive Cyclisation of Singlet and Triplet Nitrenes. Part 10. The Choice between Carbazole and Phenothiazine Formation.
Hawkins, David G.,Meth-Cohn, Otto
, p. 1218 - 1225 (2007/10/02)
2-Azido-3-(p-tolylthio)biphenyl (2) undergoes thermal decomposition to yield 1-(p-tolylthio)carbazole (5) and hot acetophenone-sensitised photolysis to give 7-methyl-1-phenylphenothiazine (6).Triethyl phosphite mediated deoxygenation of 2-nitro-3-(p-tolylthio)biphenyl (1) proceeds only at elevated temperature (214 deg) to give solely the carbazole.These results underline the singlet nitrene origin of the carbazole whereas either nitrene spin state can give the phenothiazine.
