Sodium Hydroxide → 6-(5-Chloro-2-pyridyl)-6,7-dihydro-7-hydroxy-5H-pyrrolo(3,4-b)pyrazin-5-one

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

6-(5-Chloropyridin-2-yl)-5,7-dioxo-5,6-dihydropyrrolo-[3,4-b]-pyrazine (100g) was suspended in 900 ml water. The slurry was cooled to 0-5° C. and 100 ml (7.2%) of aqueous sodium borohydride solution stabilized with 0.1 g sodium hydroxide was added in 3 hrs under vigorous stirring. Reaction mixture was stirred at 0-5° C. for 4 to 5 hrs. After completion of reaction solid was filtered and washed with 2×300 ml water. The filtered solid was refluxed in 215 ml dichloromethane for 30 min and cooled to 25-30° C. The solid was filtered, washed with 100 ml dichloromethane and dried at 50-60° C. to obtain 82 g of title compound.

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