Synthesis and transformation of 1-monosubstituted tetrazoles to pyrimidinones, benzoxazoles and quinazolinediones through 1,4-disubstituted tetrazolium salts
Sv. Voitekhovich et al., Synthesis and transformation of 1-monosubstituted tetrazoles to pyrimidinones, benzoxazoles and quinazolinediones through 1,4-disubstituted tetrazolium salts, POL J CHEM, 75(2), 2001, pp. 253-264
Synthesis and some new transformations of 1-aryltetrazoles into other heter
ocycles through 1,4-disubstituted tetrazolium salts are described. 1-Arylte
trazoles, quaternized with tert-butanol and diacetone alcohol in perchloric
acid media, gave pure 1,3- or 1,4-disubstituted tetrazolium salts or their
mixtures. 1,3-Disubstituted tetrazolium salts are slowly converted into th
e corresponding 1,4-salts under dissolving in perchloric acid. I,4-Disubsti
tuted tetrazolium salts are recyclized to 2-alkylaminobenzoxazoles, 3-mono-
substituted 2,4-quinazolinediones and mixtures of di- and tetrahydropyrimid
in-2(1H)-ones in basic conditions.