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Aromatic ring transfer—a new synthesis of 2,4-diaryl-4H-3,1-benzothiazines |
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| Authors: | Vladimir T Abaev Andrey V Gutnov |
| Institution: | a North-Ossetian State University, Vatutina st. 46, Vladikavkaz 362025, Russia b Research Institute of Heterocyclic Compounds Chemistry, Kuban State University of Technology, Moskovskaya st. 2, Krasnodar 350072, Russia c Leibniz-Institut für Organische Katalyse, Albert-Einstein-Str. 29a, D-18059 Rostock, Germany |
| Abstract: | A new synthetic approach to 2,4-diaryl-4H-3,1-benzothiazines is described based on the rearrangement of 2-isothiocyano triarylmethanes in the presence of AlCl3. An aryl ring is found to migrate to the carbon atom of an isothiocyano group followed by intramolecular cyclization as a result of electrophilic attack of the benzhydryl carbocation on the sulfur atom. |
| Keywords: | Triarylmethanes Rearrangement 4H-3 1-Benzothiazines |
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