Hydrogen Bromide → HCID 13137007, compound

Participants

Reaction Steps

Prepared by the method described in Example 36 from 3-[2-(diethylamino)propyl]-1,2,3,4-tetrahydro-8,9-dimethoxy-5H-[1]benzopyrano[3,4-c]pyridin-5-one dihydrochloride (23.3 g, 0.052 moles) and 48% aqueous hydrobromic acid (200 ml). After washing several times with cold acetone, the product (25.0 g, mp 257°-258° C.) is used as an intermediate without additional purification.

Provenance & Evidence