3,4-dihydro-2H-pyran → 3-[5-(Tetrahydro-pyran-2-yloxymethyl)-thiazol-4-yl]-benzoic acid methyl ester

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Reaction Steps

3-(5-Hydroxymethyl-thiazol-4-yl)-benzoic acid methyl ester (1.25 g), dihydropyrane (0.84 mL) and p-toluenesulfonic acid hydrate (0.10 g) in AcOEt (12 mL) was stirred at 20° C. for 3 h. The solution was diluted AcOEt, washed with 5% NaHCO3 solution and with 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-(tetrahydro-pyran-2-yloxymethyl)-thiazol-4-yl]-benzoic acid methyl ester (1.60 g) as a pale-yellow oil.

Provenance & Evidence