Pyridine → Tert-butyl 3-(n-((1r)-1-[(4-chlorophenyl)methyl]-2-oxo-2-[4-(2-{[(2,4,6-trimethylphenyl)sulfonyl]amino}phenyl) piperidyl]ethyl)carbamoyl)(3s)-1,2,3,4-tetrahydroisoquinoline-2-carboxylate

Participants

Reaction Steps

The title compound was prepared according to the procedure described in Example 21 (Step a) by treating tert-butyl 3-(N-{(1R)-2-[4-(2-aminophenyl)piperidyl]-1-[(4-chlorophenyl)methyl]-2-oxoethyl}carbamoyl)(3S)-1,2,3,4-tetrahydroisoquinoline-2-carboxylate (Example 20) (154 mg, 0.25 mmol) with 2-mesitylenesulfonyl chloride (Aldrich) (55 mg, 0.25 mmol) and pyridine (0.03 mL, 0.375 mmol) in 1,2-dichloroethane (10 mL). Purification by silica gel chromatography (100% EtOAc) provided the title compound as a white foam (146 mg). MS (ESI, pos. ion) m/z: 799 (M+1); MS (ESI, neg. ion) m/z: 797 (M−1) Calc'd for C44H51ClN4O6S: 798.32.

Provenance & Evidence