Aromatic ring transfer—a new synthesis of 2,4-diaryl-4H-3,1-benzothiazines
摘要:
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. (c) 2006 Elsevier Ltd. All rights reserved.
Aromatic ring transfer—a new synthesis of 2,4-diaryl-4H-3,1-benzothiazines
作者:Vladimir T. Abaev、Fatima A. Tsiunchik、Andrey V. Gutnov、Alexander V. Butin
DOI:10.1016/j.tetlet.2006.04.010
日期:2006.6
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. (c) 2006 Elsevier Ltd. All rights reserved.