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In this manuscript, an efficient synthesis of a functionalized 4-arylpiperidine is disclosed. Several synthetic approaches towards formation of the key aryl-piperidine sp3 carbon–carbon bond are discussed, including a scalable route to the piperidine via reaction of acyl pyridinium ions with aryl Grignard reagents to form the corresponding dihydropyridines. Methods to access the BOC protected piperidine...
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