Acetic Anhydride → HCID 20327652、化合物
反応式
[OH:1][CH:2]([CH2:20][CH2:21][CH2:22][CH2:23][CH3:24])[CH2:3][CH2:4][CH2:5][N:6]([CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][C:17]([OH:19])=[O:18])[S:7]([CH3:10])(=[O:9])=[O:8].[C:25](OC(=O)C)(=[O:27])[CH3:26]>C(OCC)C>[C:25]([O:1][CH:2]([CH2:20][CH2:21][CH2:22][CH2:23][CH3:24])[CH2:3][CH2:4][CH2:5][N:6]([CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][C:17]([OH:19])=[O:18])[S:7]([CH3:10])(=[O:8])=[O:9])(=[O:27])[CH3:26]参加物
4
反応条件
- 温度
- 60 °C
実験手順
A mixture of 7-[N-(4-hydroxynonyl)methanesulfonamido]heptanoic acid (10.9 g., 0.03 mole) (Example 1, Step B) and acetic anhydride (6.1 g., 0.06 mole) is heated at 60° C. for 18 hours. The mixture is cooled and and taken up in 80 ml. of ethyl ether. The solution is extracted with an ice-cold solution of 8 g. of sodium hydroxide in 150 ml. of water. The basic solution is separated and acidified with concentrated hydrochloric acid. The crude product that separates is extracted into ether, washed with water and dried over sodium sulfate. The ether is evaporated and the residual oil is purified by chromatography on silica gel using 2% methanol in chloroform as the eluting solvent. There is obtained 7-[N-(4-acetoxynonyl)methanesulfonamido]heptanoic acid as a viscous oil.