Ammonium formate → 4-(4,7-Diaza-spiro[2.5]oct-7-yl)-7H-pyrrolo[2,3-d]pyrimidine

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Reaction Steps

To 4-(4-benzyl-4,7-diaza-spiro[2.5]oct-7-yl)-7H-pyrrolo[2,3-d]pyrimidine (intermediate 20) (50 g, 78.36 mmol) in MeOH, was added 10% Pd/C (20 g) and HCOONH4 (98 g, 783.69 mmol) and the reaction mixture was heated to reflux for 30 min. The reaction mixture was filtered through celite bed and washed with MeOH and concentrated under reduced pressure. The crude compound was treated with 50% NaOH solution (200 ml) and stirred for 15 min and solid was obtained by filtration. And the solid was wash with 50 ml of water and dried under vacuum. The crude compound (33 g) in acetone (10 times) was heated to reflux for 30 min. The reaction mixture was cooled and filtered and the solid was washed with acetone to afford the title compound as a solid (29.78 g, 83%).

Provenance & Evidence