Pyridine → n-{(1r)-1-[(4-Chlorophenyl)methyl]-2-oxo-2-[4-(2-{[benzylsulfonyl]amino}phenyl)piperazinyl]ethyl}((3s)(3-1,2,3,4-tetrahydroisoquinolyl))carboxamide

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tert-Butyl 3-(N-{(1R)-1-[(4-chlorophenyl)methyl]-2-oxo-2-[4-(2-{[benzylsulfonyl]amino}phenyl)piperazinyl]ethyl}carbamoyl)(3S)-1,2,3,4-tetrahydroisoquinoline-2-carboxylate was prepared according to the procedure for Preparation III using tert-butyl 3-(N-{(1R)-2-[4-(2-aminophenyl)piperazinyl]-1-[(4-chlorophenyl)methyl]-2-oxoethyl}carbamoyl)(3S)-1,2,3,4-tetrahydroisoquinoline-2-carboxylate (Preparation IX) (730 mg, 1.2 mmol), pyridine (100 μl, 1.2 mmol) and α-toluenesulfonyl chloride (240 mg, 1.2 mmol) (Aldrich). The crude material was purified by flash chromatography (SiO2 10% EtOAc in CH2Cl2) to afford the desired compound (387 mg). MS (ESI, pos. ion) m/z: 772 (M+H), (ESI, neg. ion) m/z: 770 (M−H). Calc'd for C41H46ClN5O6S: 772.35. Anal. Calcd for C41H46ClN5O6S-0.5 C4H8O2: C, 63.26; H, 6.17; N, 8.58; Cl, 4.34. Found C, 62.98; H, 6.09; N, 8.36.

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