Sodium → 1,2,3,4,5,6-Hexahydro-8-methoxy-1,3-dimethyl-2,6-methano-1,3-benzodiazocine

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Reaction Steps

To a stirred solution of 4.50 g of 3,4-dihydro-6-methoxy-1-methyl-4-[2-(methylamino)ethyl]-2(1H)-quinolinone in 450 ml of refluxing n-butanol was added, incrementally over a period of 1.5 hours, 27.0 g of sodium. The resulting mixture was stirred at reflux until all of the sodium was consumed, and then it was cooled, and diluted with water. The aqueous phase was separated and extracted with ethyl acetate. The combined organic layers were washed with water and a saturated aqueous solution of sodium chloride, dried over magnesium sulfate, filtered, and concentrated. The concentrate was purified by means of column chromatography on silica gel (elution with triethylamine/methanol/ethyl acetate) followed by recrystallization from diethyl ether-pentane to afford 2.20 g (52%) of 1,2,3,4,5,6-hexahydro-8-methoxy-1,3-dimethyl-2,6-methano-1,3-benzodiazocine, m.p. 72°-73.5° C.

Provenance & Evidence