Sodium Hydroxide → HCID 13175723, compound

Participants

Reaction Steps

A solution of 6 g of 1,2,4,4a-tetrahydro-10-methoxy-7-(2furyl)-5H-[1,4]oxazino[4,3-a][1,4]benzodiazepine (for the preparation, see Example 2) in 100 ml of methylene chloride is heated under reflux with 4.2 g of 3-chloroperbenzoic acid for 3 hours. The reaction solution is then rendered alkaline with aqueous dilute sodium hydroxide solution and is worked up in the customary manner. The crude product isolated is purified by chromatography on aluminium oxide of activity level II, using methylene chloride, and is crystallised from isopropanol. 2.3 g of 1,2,4,4a-tetrahydro-10-methoxy-7-(2-furyl)-5H-[1,4]oxazino[4,3-a][1,4]benzodiazepine 6-oxide are obtained. Melting point: 183° to 186° C.

Provenance & Evidence