N,N-Dimethylglycine → 2-[1-(1-(N,N-Dimethylaminoacetyl)piperidin-3-yl)-ethylamino]-4-[benzimidazol-1-yl]pyrimidine

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Reaction Steps

To a solution of 2-[1-(piperidin-3-yl)-ethylamino]-4-[benziniidazol-1-yl]pyrimidine (EXAMPLE 18) (21 mg, 0.065 mmol) in CH2Cl2 (0.6 mL) was added N,N-dimethylglycine (10 mg, 0.098 mmol) followed by 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (19 mg, 0.098 mmol) at room temperature. After stirring for 4.5 h, the reaction mixture was diluted with EtOAc (5 mL) and was washed with H2O (2×2 mL) and brine. The organic layer was dried over Na2SO4. After removal of the solvent, the crude product was purified by preparative thin layer chromatography (1:9 2M NH3 in MeOH:CH2Cl2) to obtain the title compound. Presence of rotamers in Partial 1H NMR (500 MHz, CDCl3): δ 8.6 (s, 1H); 8.35 (br s, 1H); 8.12 (d, J=7.5 Hz, 1H); 7.82 (br s, 1H); 7.35 (br s, 2H); 6.75 (two d, J=5.3 Hz, 1H); 4.54 (m, 1H); 2.24 (s, 3H); 2.19 (s, 3H); 1.28 (br s, 3H). Mass spectrum 408.4 (ESI, M+1).

Provenance & Evidence