Piperidine → (S)-2-tert-butoxy-2-(5-(4-chlorophenyl)-7-methyl-2-(piperidin-1-ylmethyl)quinolin-6-yl)ethyl pivalate

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(S)-2-tert-Butoxy-2-(5-(4-chlorophenyl)-7-methyl-2-(piperidin-1-ylmethyl)quinolin-6-yl)ethyl pivalate was prepared following the procedure used to prepare compound (S)-2-(5-bromo-2-((dimethylamino)methyl)-7-methylquinolin-6-yl)-2-tert-butoxyethyl pivalate of Example 9, except that (S)-6-(1-tert-butoxy-2-(pivaloyloxy)ethyl)-5-(4-chlorophenyl)-2,7-dimethylquinoline 1-oxide was used instead of (S)-5-bromo-6-(1-tert-butoxy-2-(pivaloyloxy)ethyl)-2,7-dimethylquinoline 1-oxide, and piperidine was used instead of N,N-dimethylamine solution. LCMS-ESI+ (m/z): 551.3, 553.3 (M+H)+.

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