Hydrochloric Acid → 3-{[[4-(Benzyloxy)butyl](propyl)amino]carbonyl)-5-methylbenzoic acid

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Reaction Steps

To a mixture of ethyl 3-{[[4-(benzyloxy)butyl](propyl)-amino]carbonyl}-5-methylbenzoate (1.75 g, 4.25 mmol) in THF/ethanol/water (1/2/1, 30 mL) is added lithium hydroxide (0.31 g, 12.76 mmol). The reaction mixture is stirred for 2 h and then acidified to pH=3 with concentrated hydrochloric acid (0.5 mL). The reaction mixture is extracted with ethyl acetate (2×30 mL), dried over magnesium sulfate, filtered, and concentrated under reduced pressure to give 3-{[[4-(benzyloxy)butyl](propyl)amino]carbonyl}-5-methylbenzoic acid (IX, 1.63 g), ESI-MS (m/z) [M+H]+=384.

Provenance & Evidence