Ethanesulfonyl chloride → 3-(1H-benzo[d]imidazol-2-yl)-5-(1-(ethylsulfonyl)-1,2,3,6-tetrahydropyridin-4-yl)pyrazin-2-amine

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Reaction Steps

Ethanesulfonyl chloride (16.30 mg, 12.01 μL, 0.1268 mmol) was added to a solution of 3-(1H-benzimidazol-2-yl)-5-(1,2,3,6-tetrahydropyridin-4-yl)pyrazin-2-amine (60 mg, 0.1153 mmol) and DIPEA (44.71 mg, 60.26 μL, 0.3459 mmol) in N,N-dimethylformamide (1 mL) and the resulting solution stirred at ambient temperature. Analysis after 30 minutes showed SM still remaining therefore the reaction was treated with further ethanesulfonyl chloride (4 μL, 0.04222 mmol). The mixture was allowed to stir for a further 10 minutes and then partitioned between EtOAc and water. The aqueous layer was extracted with EtOAc (2×), DCM (2×), dried (MgSO4), filtered and concentrated. The mixture was triturated with DCM and the resultant yellow solid dried under vacuum at 50° C. (44.33 mg, 57% Yield).

Provenance & Evidence