Lithium Hydroxide → 4-[4-(2-Methyl-quinolin-4-ylmethoxy)-benzenesulfonylamino]-piperidine-1,3-dicarboxylic acid 1-tert-butyl ester

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A solution of 4-[4-(2-methyl-quinolin-4-ylmethoxy)-benzenesulfonylamino]-piperidine-1,3-dicarboxylic acid 1-tert-butyl ester 3-methyl ester (0.3 g, 0.525 mmol) and lithium hydroxide (0.1 g, 4.2 mmol) in THF:methanol:water (2.5: 1.5:1.5 mL) was stirred at 25° C. for 19 h. The solution was concentrated in vacuo to provide 4-[4-(2-methyl-quinolin-4-ylmethoxy)-benzenesulfonylamino]-piperidine-1,3-dicarboxylic acid 1-tert-butyl ester as a crude solid (0.170 g, 58%). MS: 557 (M+H)+

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