How is 2-{(2R,6S)-6-[(2S)-2-Hydroxy-2-phenylethyl]-1-methyl-2-piperidinyl}-1-phenylethanone hydrochloride (CAS: 134-63-4) typically synthesized?

2-{(2R,6S)-6-[(2S)-2-Hydroxy-2-phenylethyl]-1-methyl-2-piperidinyl}-1-phenylethanone hydrochloride can be synthesized through a multi-step process involving the condensation of a substituted piperidine derivative with a phenylethanol derivative under acidic conditions. The synthesis typically involves careful control of temperature and pH to ensure high yield and selectivity. Commonly used catalysts include acids such as acetic acid or trifluoroacetic acid.