Chelate synthesis of new pyrazolo-, triazolo-, and thiazolopyrimidinyl-substituted derivatives of 1-phenylpyrazol-3-one.

An efficient synthesis of new pyrazolo-, triazolo-, and thiazolopyrimidinyl-substituted derivatives of 1-phenylpyrazol-3-one on the basis of a product of the condensation of 4-acetylpyrazolone difluoroboron chelate with dimethylformamide dimethyl acetal has been developed. [ABSTRACT FROM AUTHOR]