Chemistry of isoflavone heterocyclic analogs. 10. Synthesis of pyrimidines by recyclization of isoflavones and their heterocyclic analogs

Isoflavones and their thiazole and pyrazole analogs are recyclized into the corresponding 4-(2-hydroxyphenyl)-pyrimidine derivatives under the effect of amidines. Their PMR spectra were studied. The effects related to the formation and strength of the intramolecular hydrogen bond were examined.For Communication 9, see 1].Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1542–1550, November, 1985.