Aluminum(III) Chloride → 2,3,9,10,11,12-Hexahydro-1-methyl-1H-quino-[4,3,2-ef][1,4]benzoxazepine

Participants

Reaction Steps

To a solution of lithium aluminum hydride in tetrahydrofuran (1.0M, 15.82 ml) and dry tetrahydrofuran (32 ml) was added aluminum chloride (2.10 g) in portions. The mixture was stirred for five mins, 1,3,9,10,11,12-hexahydro-1-methyl-2H-quino[4,3,2-ef][1,4]benzoxazepin-2-one (4.24 g) was added and the mixture was stirred at room temperature overnight. The reaction mixture was quenched with ethyl acetate (150 ml), 10% sodium hydroxide solution was added, and the organic layer was separated. The organic layer was washed wit brine, dried over anhydrous magnesium sulfate, filtered, and concentrated. The residue was adhered to silica (methanol) and flash chromatographed (30-50% ethyl acetate/Hexane) to yield 3.61 g (89.6%) of product, mp 97°-98° C.

Provenance & Evidence