HCID 70584365, compound → HCID 70605998, compound

Participants

Reaction Steps

The product of Example 4 (1.56 g, 3 mmol) was dissolved in a mixture of acetonitrile (120 ml) and distilled water (30 ml), degassed with argon for 30 minutes, and brought to reflux. A degassed solution of K2S2O8 (5.67 g, 21 mmol) and Na2HPO4.7H2O (2.81 g, 10.5 mmol) in distilled water (120 ml) was added in 8 equal portions at 4 minute intervals to the refluxing solution, the reaction being kept at pH >6 by the addition of solid Na2HPO4.7H2O. The acetonitrile was evaporated and the residue was extracted with ethyl acetate. The extracts were washed with brine, dried, and evaporated to an oil, 2.07 g. The oil was extracted with petroleum ether to remove the dimethoxybenzaldehyde and then was triturated with ethyl acetate-ether. It was cooled in ice and the resulting solid product was collected; 0.54 g (49%), mp 137-138° dec.

Provenance & Evidence