Trifluoroacetic acid → N-{(S)-3-[3-(4-fluorophenoxy)-azetidin-1-yl]-1-hydroxymethyl-propyl}-3,4,5-trimethoxy-benzamide

Participants

Reaction Steps

A solution of N-{(S)-1-tert-butoxymethyl-3-[3-(4-fluoro-phenoxy)-azetidin-1-yl]-propyl}-3,4,5-trimethoxy-benzamide (Example 1, 0.066 g, 0.130 mmol) in dichloromethane (2 ml) is treated with trifluoroacetic acid (0.11 ml, 0.65 mmol) and the reaction mixture stirred for 20 hours. The solvent is evaporated and the residue partitioned between ethylacetate and saturated aqueous NaHCO3. The ethylacetate phase is washed with brine, dried over magnesium sulphate and evaporated. The crude product is purified by flash silica chromatography (elution 100% ethylacetate then 5:95 methanol/dichloromethane) to afford N-{(S)-3-[3-(4-fluorophenoxy)-azetidin-1-yl]-1-hydroxymethyl-propyl}-3,4,5-trimethoxy-benzamide [MH]+ 449.1.

Provenance & Evidence