5'-(4-Iodo-3-methyl-phenylcarbamoyl)-3,4,5,6-tetrahydro-2H-[1,2']bipyridinyl-4-carboxylic acid ethyl ester → 5'-(4-Iodo-3-methyl-phenylcarbamoyl)-3,4,5,6-tetrahydro-2H-[1,2']bipyridinyl-4-carboxylic acid
反応式
C([O:3][C:4]([CH:6]1[CH2:11][CH2:10][N:9]([C:12]2[CH:17]=[CH:16][C:15]([C:18](=[O:28])[NH:19][C:20]3[CH:25]=[CH:24][C:23]([I:26])=[C:22]([CH3:27])[CH:21]=3)=[CH:14][N:13]=2)[CH2:8][CH2:7]1)=[O:5])C>C1COCC1.O>[I:26][C:23]1[CH:24]=[CH:25][C:20]([NH:19][C:18]([C:15]2[CH:16]=[CH:17][C:12]([N:9]3[CH2:10][CH2:11][CH:6]([C:4]([OH:5])=[O:3])[CH2:7][CH2:8]3)=[N:13][CH:14]=2)=[O:28])=[CH:21][C:22]=1[CH3:27]参加物
4
実験手順
A solution of 5′-(4-iodo-3-methyl-phenylcarbamoyl)-3,4,5,6-tetrahydro-2H-[1,2′]bipyridinyl-4-carboxylic acid ethyl ester (200 mg, 0.39 mmol) in THF (10 mL) and H2O (2 mL) was treated with LiOH monohydrate (33 mg, 0.78 mmol). The mixture was stirred at room temperature for 24 h and then partitioned between EtOAc and H2O. The acidity of the water layer was adjusted to pH 5 by the addition of aqueous conc. HCl and solid Na2CO3. The water layer was separated and extracted once more with EtOAc. The EtOAc layers were combined, dried over Na2SO4, filtered and concentrated. The solid residue was suspended in CH2Cl2 then filtered and dried to afford the product (70 mg, Yield: 38%). HRMS m/z calcd for C19H20N3O3I [M+H]+: 466.0622. Found: 466.0619.