Methanol → 2-({4-[2-(Heptylamino)ethyl]-1,3-thiazol-2-yl}thio)-2-methylpropionic acid tert-butyl ester
反応式
[C:1]([O:5][C:6](=[O:27])[C:7]([S:10][C:11]1[S:12][CH:13]=[C:14]([CH2:16][C:17]([NH:19][CH2:20][CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][CH3:26])=O)[N:15]=1)([CH3:9])[CH3:8])([CH3:4])([CH3:3])[CH3:2].CO>O1CCCC1>[C:1]([O:5][C:6](=[O:27])[C:7]([S:10][C:11]1[S:12][CH:13]=[C:14]([CH2:16][CH2:17][NH:19][CH2:20][CH2:21][CH2:22][CH2:23][CH2:24][CH2:25][CH3:26])[N:15]=1)([CH3:9])[CH3:8])([CH3:4])([CH3:3])[CH3:2]参加物
4
実験手順
2-({4-[2-(Heptylamino)-2-oxoethyl]-1,3-thiazol-2-yl}thio)-2-methylpropionic acid tert-butyl ester (12.0 g) obtained in Example 303-1 was dissolved in tetrahydrofuran (120 mL), 1 M-borane/tetrahydrofuran complex (100 mL) was added under ice-cooling, and the mixture was stirred at room temperature for 12 hr. The reaction mixture was ice-cooled, and methanol (400 mL) was added dropwise. After warming to room temperature, the mixture was stirred for 1 hr. The reaction mixture was concentrated under reduced pressure, piperidine (120 mL) was added, and the mixture was stirred at 50° C. for 3 hr. The reaction mixture was concentrated under reduced pressure, and the residue was purified by silica gel chromatography (elution solvent; dichloromethane:methanol=20:1 to 10:1) to give the title compound (5.5 g) as a slightly yellow oil.