3-Benzyl-8-methyl-3,8-diazabicyclo[3.2.1]octane → 8-Benzyl-3-methyl-3,8-diazabicyclo[3.2.1]octane

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Reaction Steps

Reduction of 9.6 g (0.039 mole) of 8-benzyl-3-methyl-3,8-diazabicyclo [3.2.1]octane-2,4-dione with lithium aluminum hydride in tetrahydrofuran by the procedure used for the preparation of 3-benzyl-8-methyl-3,8-diazabicyclo[3.2.1]octane, as described in Example 1, gave 8.3 g of crude desired product. Chromatography on 124 g alumina with chloroform elution gave 6.9 g (81%) of pure, oil 8-benzyl-3-methyl-3,8-diazabicyclo[3.2.1]octane. The hydrochloride salt, formed in diethyl ether by addition of three equivalents of ethanolic hydrogen chloride, melted at 263.5°-272°C (dec.) with sublimation above 180°C.

Provenance & Evidence