Ethyl bromopyruvate → HCID 20368822, compound

Participants

Reaction Steps

In a single-necked flask were combined, 2.1 g. (0.010 mole) of 2-amino-4-ethoxy-6-fluoroquinoline, 2.1 g. (0.011 mole) ethyl bromopyruvate and 30 ml. of acetone. The mixture was refluxed for two hours, cooled to room temperature and the precipitated solid removed by filtration. The solid was partitioned between chloroform and 1N aqueous potassium hydroxide, the organic layer dried over magnesium sulfate and evaporated to dryness to yield 1.7 g. of crude product. This was dissolved in a small amount of chloroformethanol (95:5 v/v) and chromatographed on a column of 50 g. of 60-200 mesh silica gel (J. T. Baker Co.) eluting with the same solvent. Fractions of 50 ml. each were taken when ultraviolet light absorbing material began to come off the column. Fractions 1 through 8 were combined and evaporated to dryness in vacuo to afford 750 mg. of the title compound as a white solid, which upon crystallization from isopropanol melted at 213.5°-214.5° C.

Provenance & Evidence