反应详情

To a solution of 2-[4-(3-methoxy-propoxy)-3-methyl-pyridin-2-yl-methanesulfinyl]-1H-benzimidazole sodium salt (RABEPRAZOLE sodium salt, 1.0 g, 2.62 mmol), 5 mL of Et3N, and about 1 g of NaHCO3 in CH2Cl2 (15 mL) was added the sulfonyl chloride (Intermediate 43, 1.27 g, 3.15 mmol, 1.2 eq) in CH2Cl2 at room temperature, and then the mixture was stirred for 1.5 h. Thereafter water was added, the mixture was extracted with CH2Cl2, and the organic layers were dried, and concentrated. The resulting residual oil was purified by column chromatography (CH2Cl2 to 1% MeOH in CH2Cl2) to yield 1.5 g (76%) of 3-{2-[4-(3-methoxy-propoxy)-3-methyl-pyridin-2-yl-methanesulfinyl]-benzimidazole-1-sulfonyl}benzoic acid 2-(toluene-4-sulfonyl)ethyl ester (Intermediate 48) as an off-white foam.

1. extractionthe mixture was extracted with CH2Cl2
2. customthe organic layers were dried
3. concentrationconcentrated
4. customThe resulting residual oil was purified by column chromatography (CH2Cl2 to 1% MeOH in CH2Cl2)