Dimethylamine → 2-[2-(Dimethylamino)ethyl]-2,3-dihydro-4,8-dimethylpyrido[3,2-f][1,4]-oxazepin-5(4H)-one fumarate

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Reaction Steps

To 50 ml of freshly collected dimethylamine was added 5.0 g (0.020 mole) of 2-(2-chloroethyl)-2,3-dihydro-4,8-dimethylpyrido[3,2-f]-1,4-oxazepin-5(4H)-one hydrate [1:1]. The reaction flask was sealed tightly and left standing at room temperature for 3 days. The dimethylamine was evaporated in a stream of air. The residue was taken up in methylene chloride, washed twice with 1N sodium hydroxide and once with water, dried over sodium sulfate, filtered and concentrated by rotary evaporation. The syrupy residue was treated with 2 equivalents of fumaric acid in isopropyl alcohol which yield 5.2 g (52%) of white crystals, m.p. 164°-165° C.

Provenance & Evidence