Cyclopropylamine → 1-Benzhydryl-3-cyclopropylamino-3-methylazetidine

Participants

Reaction Conditions

Reaction Steps

A suspension of 16.6 g of 1-benzhydryl-3-methane-sulphonyloxy-3-methylazetidine and 28.84 g of of cyclopropylamine in 250 cm3 of ethanol is stirred for 96 hours at approximately 20° C. The reaction mixture is concentrated under reduced pressure (20 kPa) at approximately 30° C. The dry extract is taken up with 50 cm3 of water and 8.8 g of methanesulphonic acid. The aqueous phase is washed with 3 times 25 cm3 of dichloromethane, treated with 12 cm3 of 35% aqueous sodium hydroxide and extracted with 3 times 50 cm3 of ethyl acetate. The combined organic phases are washed with twice 50 cm3 of water, dried over magnesium sulphate and concentrated to dryness under reduced pressure (20 kPa) at approximately 25° C. 14.6 g of 1-benzhydryl-3-cyclopropylamino-3-methylazetidine are obtained in the form of a yellow oil, which is used without further purification for the subsequent steps.

Provenance & Evidence