反应详情

To 10 g of 6-benzyl-5,7-dihydro-5,7-dioxopyrrolo[3.4-b]pyridine were added 84 ml of 2-methoxyethanol and 1.5 g of a ruthenium-on-carbon catalyst, and hydrogenation was conducted under a pressurized hydrogen gas atmosphere at 4.5 kg/cm2 for 22 hours. The catalyst was removed by filtration, and the filtrate was concentrated. To the concentrate were added 84 ml of 2-methoxyethanol and 2 g of a palladium-on-charcoal catalyst, and hydrogenation was conducted under a pressurized hydrogen gas atmosphere at 4.5 kg/cm2 for 7 hours. The catalyst was removed by filtration, and the filtrate was concentrated to yield 10.4 g of the titled compound. Throughout the hydrogenation, the reaction vessel was heated by a tungsten lamp.

1. customThe catalyst was removed by filtration
2. concentrationthe filtrate was concentrated
3. additionTo the concentrate were added 84 ml of 2-methoxyethanol and 2 g of a palladium-on-charcoal catalyst, and hydrogenation
4. waitwas conducted under a pressurized hydrogen gas atmosphere at 4.5 kg/cm2 for 7 hours
5. customThe catalyst was removed by filtration
6. concentrationthe filtrate was concentrated