Benzaldehyde → HCID 54339345, compound

Participants

Reaction Steps

A solution of 5-(4-acetylphenylmethylene)thiazolidine-2,4-dione (1.0 g, 4.0 mmol) and benzaldehyde (0.62 ml, 6.1 mmol) in 1N NaOH (14 ml) and methanol (25 ml) was stirred for 1 hour at 0° C. and then at room temperature for 3 days, the precipitate was collected and dissolved in water, and this solution was acidified with 2N HCl and extracted with ethyl acetate (2×30 ml). The combined extracts were washed with brine (30 ml), dried over sodium sulfate and concentrated in vacuo, leaving the free acid form of title product (0.4 g, 29%) as a yellow solid. The latter was converted to sodium salt according to the method of Example 42.

Provenance & Evidence