反応式
[CH3:1][C:2](=[CH:5][CH:6]=[C:7]([CH3:24])[CH:8]=[CH:9][CH:10]=[C:11]([CH3:23])[CH:12]=[CH:13][C:14]1[C:19]([CH3:21])([CH3:20])[CH2:18][CH2:17][CH2:16][C:15]=1[CH3:22])[CH2:3][OH:4].[CH:25](OC)(OC)OC.CO.FC(F)(F)C(O)=O.C([O-])(O)=O.[Na+]>C1COCC1>[CH3:25][O:4][CH2:3][C:2]([CH3:1])=[CH:5][CH:6]=[C:7]([CH3:24])[CH:8]=[CH:9][CH:10]=[C:11]([CH3:23])[CH:12]=[CH:13][C:14]1[C:19]([CH3:21])([CH3:20])[CH2:18][CH2:17][CH2:16][C:15]=1[CH3:22]参加物
反応物 5
生成物 1
試薬・触媒・溶媒 1
実験手順
To a solution of 2,5,9-trimethyl-11-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4,6,8,10-undecapentaene-1-ol (1.6 g, 5 mmol), 106 g (10 mmol) of trimethyl orthoformate and 160 mg (5 mmol) of dry methanol in 5 ml of dry THF is added dropwise a solution of 40 μL of trifluoroacetic acid in 1 ml of dry THF over a 1 minute period at room temperature. After overnight standing, the reaction mixture is poured into cold aqueous 5% NaHCO3 and extracted with chloroform three times. The combined organic extract is washed with water, dried over Na2SO4 and evaporated in vacuo to give a residue, which is purified by HPLC (4% ether in hexane, silica gel column) to afford of 1-methoxy-2,5,9-trimethyl-11-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4,6,8,10-undecapentaene as an oil.
後処理
- extractionextracted with chloroform three times
- extractionThe combined organic extract
- washis washed with water
- dry with materialdried over Na2SO4
- customevaporated in vacuo
- customto give a residue, which
- customis purified by HPLC (4% ether in hexane, silica gel column)
出典と根拠
- ORDレコード
- ord-881c5b03087e4b6fa8b661db36b63481
- 出典データセット
- uspto-grants-1988_02
- 特許番号
- US04722939
関連ノート
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