2-Amino-5-[3-(tetrahydro-pyran-2-yloxy)-prop-1-ynyl]-4-trifluoromethyl-benzoic acid methyl ester → 2-Amino-5-[3-(tetrahydro-pyran-2-yloxy)-propyl]-4-trifluoromethyl-benzoic acid methyl ester

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Reaction Steps

A suspension of 2-amino-5-[3-(tetrahydro-pyran-2-yloxy)-prop-1-ynyl]-4-trifluoromethyl-benzoic acid methyl ester (2.20 g, 6.16 mmol) and palladium on carbon (250 mg, 10%) in THF (15 mL) was stirred at r.t. for 30 min under hydrogen (5 bars). The mixture was then filtered and concentrated in vacuo. The crude product was purified by flash chromatography (silica gel 60, hexanes/EtOAc 5:1) to afford 2-amino-5-[3-(tetrahydro-pyran-2-yloxy)-propyl]-4-trifluoromethyl-benzoic acid methyl ester (1.99 g, 5.51 mmol, 89%) as a colorless oil, ESI-MS: m/z 384 [M+Na]+, rt 6.20 min)

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