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.
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.