Propionyl chloride → 2-methyl-N-(3-{1-[(3S)-3-phenyl-3-(propionylamino)propyl]-4-piperidinyl}phenyl)propanamide

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According to the procedure used for the synthesis of N-(3-{1-[(3S)-3-(acetylamino)-3-phenylpropyl]-4-piperidinyl}phenyl)-2-methylpropanamide, N-(3-{1-[(3S)-3-amino-3-phenylpropyl]-4-piperidinyl}phenyl)-2-methylpropanamide (11.0 mg, 0.0280 mmol) and propionyl chloride (3.80 mg, 0.0420 mmol) provided 2-methyl-N-(3-{1-[(3S)-3-phenyl-3-(propionylamino)propyl]-4-piperidinyl}phenyl)propanamide (12 mg, 97% yield). 1H NMR (400 MHz, CDCl3) δ 8.05 (s, 1H), 7.59 (s, 1H), 7.40–7.20 (m, 7H), 6.96 (s, 1H), 5.19–5.12 (m, 1H), 3.18 (d, 1H, J=12.0 Hz), 2.99 (d, 1H, J=10.4 Hz), 2.93–2.86 (m, 1H), 2.61–2.40 (m, 3H), 2.38–2.23 (m, 3H), 2.19–1.75 (m, 8H), 1.25 (d, 6H, J=6.9 Hz), 1.22–1.08 (m, 3H); ESMS m/e: 436.4 (M+H)+.

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