4-Methylmorpholine → N,N-dimethyl-beta-alanine, [2-[[(4-methoxy-3,5-dimethyl-2-pyridinyl)methyl]sulfinyl]-1H-benzimidazol-1-yl]-methyl ester

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Reaction Conditions

Reaction Steps

N,N-dimethyl-β-alanine (0.76 g 0.005 mol) and N-methyl morpholine (0.99 g 0.01 mol) was added to CH2Cl2 (15 ml). The solution was cooled to -10° C. and isobutylchloroformate, (0.68 g 0.005 mol) dissolved in CH2Cl2 (15 ml), was added under inert atmosphere. The solution was stirred for about 20 min at -10° C. [2-[[(4-methoxy-3,5-dimethyl-2-pyridinyl)methyl]-sulfinyl]-1H-benzimidazol-1-yl]methanol dissolved in CH2Cl2 (15 ml) was added dropwise to the mixed anhydride at -10° C. The solution was stirred 2 h at -10°, and the temperature was thereafter raised to room temperature. NaOH solution (25 ml 0.24) was added under stirring and the mixture was stirred for about 5 min. After separation the CH2Cl2 phase was dried over Na2SO4, filtered and the solution was evaporated off, giving the desired compound (yield 0.7 g 32%). The identity of the title compound was confirmed with NMR.

Provenance & Evidence