[C:1]([C:4]1[CH:9]=[CH:8][C:7]([NH:10][CH2:11][C:12]2[CH:17]=[CH:16][C:15]([CH:18]([O:27]C3CCCCO3)[C:19]3[CH:20]=[C:21]([CH:24]=[CH:25][CH:26]=3)[C:22]#[N:23])=[CH:14][CH:13]=2)=[C:6]([CH3:34])[C:5]=1[OH:35])(=[O:3])[CH3:2].Cl>CO>[C:1]([C:4]1[CH:9]=[CH:8][C:7]([NH:10][CH2:11][C:12]2[CH:13]=[CH:14][C:15]([CH:18]([OH:27])[C:19]3[CH:20]=[C:21]([CH:24]=[CH:25][CH:26]=3)[C:22]#[N:23])=[CH:16][CH:17]=2)=[C:6]([CH3:34])[C:5]=1[OH:35])(=[O:3])[CH3:2]To 3-[{4-[(4-acetyl-3-hydroxy-2-methyl-phenylamino)-methyl]-phenyl}-(tetrahydro-pyran-2-yloxy)-methyl]-benzonitrile (538 mg, 1.1 mmol) in MeOH (5 mL) is added conc. HCl (0.33 mL). The reaction mixture is stirred at RT for 6 h. The reaction mixture is concentrated and the residue partitioned between saturated aqueous NaHCO3 and EtOAc. The organic layer is separated and the aqueous extracted with EtOAc (2×). The organic layers are combined, washed with brine, dried over Na2SO4, and concentrated. The residue is purified by flash column chromatography using 40% EtOAc/hexane as eluent. Obtained is the title compound as yellow foam (305 mg, 72%). LC-MS (m/e): 385 (M−1).
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