反应详情

3-(2-hydroxymethyl-5-methyl-thiazol-4-yl)-benzoic acid methyl ester (0.38 g), dihydropyrane (0.73 mL) and p-toluenesulfonic acid hydrate (0.07 g) in AcOEt (10 mL) was stirred at 20° C. for 1 h. The solution was diluted with AcOEt, washed with 5% NaHCO3 solution and brine, dried and evaporated. The residual oil was purified by chromatography on silica gel using AcOEt/hexane (1:3) as eluent to give 3-[5-propyl-4-(tetrahydro-pyran-2-yloxymethyl)-thiazol-2-yl]-benzoic acid methyl ester (0.36 g) as a pale-yellow oil.

1. washwashed with 5% NaHCO3 solution and brine
2. customdried
3. customevaporated
4. customThe residual oil was purified by chromatography on silica gel