CONDENSATION OF 2-(4-CHLOROPHENYL)-1-(2,4-DIHYDROXYPHENYL)ETHANONE WITH <i>N</i>,<i>N</i>-DIMETHYLFORMAMIDE DIMETHYL ACETAL: AN EFFECTIVE APPROACH TO 3-(4-CHLOROPHENYL)-7-METHOXY-4<i>H</i>-CHROMEN-4-ONE, N,O- AND N,N-HETEROCYCLES
DOI:
https://doi.org/10.1007/2617Ключевые слова:
deoxybenzoin, N, N-dimethylformamide dimethyl acetal, enamino ketone, 2-hydroxydeoxybenzoin, isoflavone, heterocyclizationАннотация
A convenient sequence for the preparation of 2-(4-chlorophenyl)-1-(2,4-dimetoxyphenyl)- 3-(dimethylamino)prop-2-en-1-one has been developed. It has been demonstrated that the use of 1-(2,4- dihydroxyphenyl)ethanone or 1-(2-hydroxy-4-methoxyphenyl)ethanone in a condensation reaction with N,N-dimethylformamide dimethyl acetal leads to their heterocyclization to give an isoflavone. Reactions of the enamino ketone with N,O- and N,N-binucleophiles have been studied; as the result, 4,5-diarylisoxazole, 4,5-diarylpyrazoles, and 4,5-diaryl-substituted 2-aminopyrimidine have been obtained in good yields.
How to Cite
Moskvina, V. S.; Shilin, S. V.; Khilya, V. P. Chem. Heterocycl. Compd. 2015, 51, 799. [Khim. Geterotsikl. Soedin. 2015, 51, 799.]
For this article in the English edition see DOI 10.1007/s10593-015-1777-3