78500-70-6Relevant articles and documents
Aryl ring migration reaction in the synthesis of 2,4-diaryl-4H-3,1- benzothiazines
Butin, Alexander V.,Tsiunchik, Fatima A.,Abaev, Vladimir T.,Gutnov, Andrey V.,Cheshkov, Dmitry A.
scheme or table, p. 2616 - 2626 (2010/02/16)
A new rearrangement of 1-(diarylmethyl)-2-isothiocyanatobenzenes into 2,4-diaryl-4H-3,1-benzothiazine derivatives is described. Treatment of the starting compounds with aluminum trichloride under Friedel-Crafts conditions leads to migration of an aryl sub
Intramolecular Nitrene Insertions into Aromatic and Heteroaromatic Systems. Part 7. Insertions into Electron-deficient Rings
Carde, Robert N.,Hayes, Peter C.,Jones, Gurnos,Cliff, Cynthya J.
, p. 1132 - 1142 (2007/10/02)
A number of routes to o-aminotriphenylmethanes are described, where one benzene ring, or both, carry potential ester groups.The most useful synthon is shown to be the 1,3-dioxan-2-yl substituent, and using this methyl 2-aminodiphenylmethane-4'-carboxylate (18) and dimethyl 2-aminotriphenylmethane-4',4''-dicarboxylate (28) have been prepared.The azides from these, respectively (19) and (29), on thermolysis at 200 deg C gave azepinoindoles (48) and (51), the first examples of ring expansion by an arylnitrene of benzene rings with electron-withdrawing substituents.Also reported are syntheses of 3- and 4-(2-azidobenzyl)pyridines (38) and (39), and of 2-(2-azidobenzyl)thiazole (40); decomposition of these azides gave mainly polymers.