Hydrochloric Acid → HCID 10548134, compound

Participants

Reaction Steps

A mixture of 4.0 g of methyl 4-[[[5-methoxy-3-(1-methylethoxy)benzo[b]thien-2-yl]carbonyl]amino]benzoate and 2 g of 50% NaOH in 100 mL of 10% aqueous methanol is heated on a steam bath for 15 minutes, then poured onto ice and acidified with 10% HCl. The resulting gum is extracted into 500 mL of diethyl ether. The organic phase is dried over magnesium sulfate, filtered, and concentrated in vacuo. The crude solid is triturated with t-butyl methyl ether to provide 2.5 g of product; mp 236°-239° C. (dec).

Provenance & Evidence