[CH2:1]([C:6]1[CH:11]=[CH:10][C:9]([CH:12]([CH3:16])[C:13]([OH:15])=[O:14])=[CH:8][CH:7]=1)[CH:2]=[C:3]([CH3:5])[CH3:4].S(Cl)(Cl)=O.N1C=CC=CC=1.[CH:27]1(O)[CH2:32][CH2:31][CH2:30][CH2:29][CH2:28]1>C1C=CC=CC=1>[CH2:1]([C:6]1[CH:7]=[CH:8][C:9]([CH:12]([CH3:16])[C:13]([O:15][CH:27]2[CH2:32][CH2:31][CH2:30][CH2:29][CH2:28]2)=[O:14])=[CH:10][CH:11]=1)[CH:2]=[C:3]([CH3:5])[CH3:4]To an ice-cooled solution of 26.0 g of 2-(p-prenylphenyl)propionic acid in 200 ml of benzene were added dropwise 15.7 g of thionyl chloride and 10.4 g of pyridine at the same time with stirring over one hour, and then the mixture was stirred at room temperature for 30 minutes. After ice-cooling, to this mixture were added 13.0 g of cyclohexanol and 10.4 g of pyridine. The resulting mixture was stirred for 2 hours at room temperature, and then washed with 1 N hydrochloric acid, water, 5% aqueous sodium hydroxide and water successively, and dried over anhydrous mangesium sulfate. The solvent was evaporated to give 23.5 g of cyclohexyl 2-(p-prenylphenyl)propionate. b.p. 142° C./0.06 mmHg, IR νmaxneat ; 1730 cm-1.
読み込み中…
