3-Amino-5-methylisoxazole → HCID 14368606, compound

Participants

Reaction Steps

A solution of 6.0 g of 3-amino-5-methylisoxazole and 10 g of 1,2-dihydro-4-hydroxy-1-phenyl-3-quinolinecarboxylic acid, ethyl ester in 150 ml of toluene was refluxed for 16 hours in a soxhlet apparatus containing 10 g of 4 Å molecular sieves. The solution was cooled to room temperature, treated with 30 g of activated manganese dioxide, stirred for three hours at 30° C., and filtered. Evaporation of the volatiles afforded a residue which was purified by means of high pressure liquid chromatography (silica gel: 1% methanol-dichloromethane as the eluent) to yield 5.8 g (49%) of 1,4-dihydro-N-(5-methyl-3-isoxazolyl)-4-oxo-1-phenyl-3-quinolinecarboxamide m.p. 163°-164° C.

Provenance & Evidence