Acetic Acid → HCID 13477125, compound

Participants

Reaction Steps

To a solution of 2.8 g (0.011 m) of 2-(6,11-dihydro-11-oxodibenz[b,e]oxepin-2-yl)ethylamine of Example 6 in 60 ml of acetonitrile and 2.7 ml of 37% aqueous formaldehyde (0.1 m), 2.05 g (0.033 m) of NaBH3CN was added. There was a slightly exothermic reaction. Glacial acetic acid (2 ml) was added over 10 minutes and the reaction was stirred at ambient temperature for 2 hours. An additional 2 ml of glacial acetic acid was added and stirring was continued for 30 minutes. The solvent was evaporated under reduced pressure and the residue was treated with 60 ml of 2N KOH. The resulting mixture was extracted three times with ether. The combined ether extracts were washed with 60 ml of 0.5N KOH and then extracted three times with 1N HCl. The aqueous acidic extracts were combined and neutralized with solid KOH and then extracted with ether. The dried (Na2SO4 ) organic phase was filtered and ethereal HCl was added to precipitate 2-(6,11-dihydro-11-oxodibenz[b,e]oxepin-2-yl)-N,N-dimethylethylamine hydrochloride, 1.4 g (40%), m.p. 175°-176° C.

Provenance & Evidence