Toluene → rac-(2RS,3RS,5SR)-3-benzoyloxy-2-hexyl-5-undecyl-delta-valerolactone

反応式

[C:1]([O:9][C:10](=[O:17])[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1)(=O)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.Cl(O)(=O)(=O)=O.[C:23]1([CH3:29])[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1>>[C:10]([O:9][CH:1]1[CH2:2][CH:7]([CH2:6][CH2:5][CH2:4][CH2:3][CH2:1][CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH3:7])[O:17][C:10](=[O:9])[CH:24]1[CH2:25][CH2:26][CH2:27][CH2:28][CH2:23][CH3:29])(=[O:17])[C:11]1[CH:12]=[CH:13][CH:14]=[CH:15][CH:16]=1

参加物

反応物 3

HCID 1140Toluene

HCID 7167Benzoic anhydride

HCID 24247Perchloric Acid

生成物 1

HCID 22463416rac-(2RS,3RS,5SR)-3-benzoyloxy-2-hexyl-5-undecyl-delta-valerolactone収率 103.4%

実験手順

177.3 g of the δ-lactone from c) were suspended in 1250 ml of toluene while stirring. After the addition of 138.6 g of benzoic anhydride the mixture was stirred for 10 minutes. Then, 2.5 ml of perchloric acid were added. The mixture was stirred for a further 2.5 hours. The reaction solution was extracted in toluene with 1N sodium hydroxide solution and then with water. The combined toluene phases were dried, the drying agent was filtered off under suction and washed with toluene. Evaporation of the solvent gave 237.2 g (103.4%) of rac-(2RS,3RS,5SR)-3-benzoyloxy-2-hexyl-5-undecyl-δ-valerolactone, which was used in the next step without purification.