Hydrochloric Acid → Ethyl 2-{4-[2-(6 [(hydroxyimino)(phenyl)methyl]-2-oxo-1,3-benzo-thiazol-3(2H)-yl)ethoxy]phenoxy}-2-methylpropanoate

Participants

Reaction Steps

A solution of the compound obtained in Step A of Example 31 (500 mg) and hydroxylamine hydrochloride (137 mg) in 10 ml of pyridine is heated at reflux for 3 hours. The reaction mixture is hydrolysed using 100 ml of ice-cold water and is acidified using 6N HCl. The precipitate obtained is then filtered off, washed with water and then with petroleum ether and purified on silica gel (eluant AcOEt/PE 2/8) to yield the title compound in the form of a white powder.

Provenance & Evidence