Acetic Acid → 5-(2-Carboxy-alpha-methylbenzylidene)rhodanine

Participants

Reaction Steps

To a hot stirred solution of 2-carboxyacetophenone (1.91 g., 11.65 mM) and 1.57 g. (11.75 mM) of rhodanine in 8 ml. of acetic acid is added 3.12 g. (38.1 mM) of sodium acetate. The solution is refluxed for 3.5 hours, cooled, and poured into water, whereupon a gum forms. The gum crystallizes and is collected and recrystallized from methanol to give 5-(2-carboxy-α-methylbenzylidene) rhodanine as yellow-brown crystals, m.p. 193°-195°.

Provenance & Evidence