1-(4-Nitrophenyl)-3-azabicyclo[3.1.0]hexane-2,4-dione → 1-(4-Aminophenyl)-3-azabicyclo[3.1.0]hexane-2,4-dione

Participants

Reaction Steps

To a solution of 25.9 g of 1-(4-nitrophenyl)-3-azabicyclo[3.1.0]hexane-2,4-dione (preparation as described in DE-OS 2 740 562) in 700 ml of ethanol are added 1.4 g of 5% palladium/carbon catalyst. Hydrogenation is carried out under normal pressure and at room temperature with hydrogen. When the absorption of hydrogen is complete (theoretical amount: 7500 ml), the reaction mixture is diluted with 1 ml of ethanol and concentrated after removal of the catalyst. The product so obtained is recrystallised from ethanol, affording the title compound with m.p. 183°-185° C.

Provenance & Evidence