{2-[3-Chloro-5-(3-fluorophenyl-(3-tetrazol-2-yl-propyl)-carbamoyl)-phenoxy]-ethyl}-pyridin-4-yl-carbamic acid tert-butyl ester → 3-Chloro-N-(3-fluoro-phenyl)-5-[2-(pyridin-4-ylamino)-ethoxy]-N-(3-tetrazol-2-yl-propyl)-benzamide

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A solution of {2-[3-chloro-5-(3-fluorophenyl-(3-tetrazol-2-yl-propyl)-carbamoyl)-phenoxy]-ethyl}-pyridin-4-yl-carbamic acid tert-butyl ester (0.07 g) in trifluoroacetic acid (0.75 ml) and dichloromethane (0.75 ml) was stirred at room temperature for 1 h then concentrated under vacuum. The residue was purified by flash chromatography, eluting with dichloromethane/methanol/ammonia (90:10:1) to give the title compound as a white foam (0.042 g).

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