Condensation of 2-hydroxyacetophenones with trichloroacetonitrile as a route to 2-trichloromethylchromones and 4-hydroxycoumarins
摘要:
Condensation of 2-hydroxyacetophenones with trichloroacetonitrile in the presence of N-methylanilinomagnesium bromide affords hydroxyaryl beta-amino-beta-trichloromethylvinyl ketones, which are converted into 2-trichloromethylchromones upon treatment with concentrated HCl. The resulting compounds react with alcoholic solutions of NH3 or KOH to Form 3-amino-1-(2-hydroxyaryl)-4,4,4-trichlorobut-2-en-1-ones and 4-hydroxycoumarins, respectively.
Hamed, Ashraf A.; Madkour, Hassan M. F.; Nuaimi, Ibrahim S. Al., Anales de Quimica, 1994, vol. 90, # 5-6, p. 359 - 364
作者:Hamed, Ashraf A.、Madkour, Hassan M. F.、Nuaimi, Ibrahim S. Al.、Hussain, Badria A.
DOI:——
日期:——
Condensation of 2-hydroxyacetophenones with trichloroacetonitrile as a route to 2-trichloromethylchromones and 4-hydroxycoumarins
作者:V. Ya. Sosnovskikh、V. A. Kutsenko、I. S. Ovsyannikov
DOI:10.1007/bf02494778
日期:2000.3
Condensation of 2-hydroxyacetophenones with trichloroacetonitrile in the presence of N-methylanilinomagnesium bromide affords hydroxyaryl beta-amino-beta-trichloromethylvinyl ketones, which are converted into 2-trichloromethylchromones upon treatment with concentrated HCl. The resulting compounds react with alcoholic solutions of NH3 or KOH to Form 3-amino-1-(2-hydroxyaryl)-4,4,4-trichlorobut-2-en-1-ones and 4-hydroxycoumarins, respectively.