Sodium Hydroxide → HCID 10144138, compound

Participants

Reaction Steps

To a solution of 6,7-dimethoxy-N2-(4-phenyl-piperidin-4-ylmethyl)-N2-methyl-quinazoline-2,4-diamine 11 (250 mg) and 1,4-benzodioxan-6-carboxaldehyde (105 mg) in 1,2-dichloroethane (5 ml) was added sodium triacetoxyborohydride (140 mg) in one portion. The mixture was stirred at room temperature for two days. Aqueous NaOH (1N, 5 ml) was added and stirring was continued for one hour. The product was isolated by extraction with dichloromethane and purified by flash chromatograpy, to yield N2-[1-(2,3-Dihydro-benzo[1,4]dioxin-6-ylmethyl)-4-phenyl-piperidin-4-ylmethyl]-6,7-dimethoxy-N2-methyl-quinazoline-2,4-diamine 16, MS: 556 ([M+H]+). Treatment of the product with HCl in methanol/ethyl acetate gave 320 mg of the dihydrochloride salt.

Provenance & Evidence