Water → 7-(7H-Pyrrolo[2,3-d]pyrimidin-4-yl)-4,7-diaza-spiro[2.5]octane-4-sulfonic acid methylamide

Participants

Reaction Steps

To 4-(4,7-Diaza-spiro[2.5]oct-7-yl)-7H-pyrrolo[2,3-d]pyrimidine (2 g, 8.7 mmol) (intermediate 21) in dry pyridine (100 mL) was cooled to 0° C. and dropwise added a solution of commercial available methylsulfamoyl chloride (419 mg, 8.7 mmol) in dry Et2O (5 mL). After complete addition, the reaction mixture was allowed to warm up to rt and was afterwards stirred at rt for 1 h. An additional equivalent of methylsulfamoyl chloride (419 mg, 8.7 mmol) in dry Et2O (5 mL) was added and after additional 1 h at rt a third equivalent of methylsulfamoyl chloride (419 mg, 8.7 mmol) in dry Et2O (5 mL) was added. The crude mixture was treated with water (150 mL) and extracted with EtOAc (3×100 mL). The combined organic phases were washed with H2O (2×50 mL), brine (2×50 mL), dried over Na2SO4, filtered and concentrated in vacuo. Recrystallised in EtOH:CH2Cl2 affording the title compound as white crystals.

Provenance & Evidence