反应详情

In the first step of the present invention, to an aqueous solution of acetonedicarboxylic acid (3) as a basic material, ammonia water and an aqueous solution of glutaraldehyde (4) are sequentially added slowly under cooling with ice to form a bicyclo-form (5) by condensation reaction. By condensation by Mannich reaction and subsequent decarboxylation, formation of 9-azabicyclo[3.3.1]nonane ring occurs to form 9-azabicyclo[3.3.1]nonan-3-one (5), which can be obtained as a powder only by removing excessive water and ammonia by a freeze-dryer after completion of the reaction.

1. temperatureunder cooling with ice