Acetyl chloride → HCID 21427238, compound

Participants

Reaction Steps

82.4 g. (0.125 mole) of N-(3-carboxy-5-amino-2,4,6-triiodobenzoyl)-DL-serine methylamide (IVb), m.p. 259°-260° C. (decomposition), is dissolved in 200 ml. of dimethylacetamide; under agitation, 33.4 ml. of acetyl chloride is added dropwise thereto. The reaction mixture is agitated for 20 hours, mixed with 40 ml. of water, and, after another 30 minutes of agitation, concentrated under vacuum. The residue is stirred overnight with 150 ml. of water, the precipitate is vacuum-filtered, stirred in 150 ml. of 1 N sodium hydroxide solution with the addition of 15 ml. of 37% strength sodium hydroxide solution and activated carbon for 2 hours, the activated carbon is removed, and the filtrate is brought to pH 1 with concentrated hydrochloric acid. After allowing the reaction mixture to stand overnight at 0° C., the precipitate is vacuum-filtered, washed with ice water, and dried under vacuum at 70° C.

Provenance & Evidence