Sodium Hydroxide → HCID 15044890, compound

Participants

Reaction Conditions

Reaction Steps

Sodium cyanoborohydride (13.6 g, 0.22 mol) is added in portions to a solution of 6,11-dihydro-11-oxodibenz[b,e]oxepin-3-carboxaldehyde, oxime (11 g; 0.04 mol) in acetic acid (150 ml) at 15°-20° C. (cooling). After the mixture is stirred for 2.5 hours, an additional portion of sodium cyanoborohydride (2 g) is added and the solution is stirred for an additional 2 and 3/4 hours. The mixture is neutralized to pH ~7 with 50% sodium hydroxide solution, the temperature being maintained at 65° C. The product is extracted with ethyl acetate, followed by washings with water, saturated sodium chloride solution, drying and evaporating under reduced pressure to give 13.2 g of a solid residue. The residue is flash chromatographed on silica gel with chloroform then with chloroform:methanol=95:5, as eluant to give 8.66 g (78%); 3[(hydroxyamino)methyl]dibenz[b,el]oxepin-11(6H)-one, as a solid.

Provenance & Evidence