Pyridine → 2,2,2-Trifluoro-1-(3-propyloxetan-3-yl)ethyl hex-5-ynoate
反応式
[OH:1][CH:2]([C:7]1([CH2:11][CH2:12][CH3:13])[CH2:10][O:9][CH2:8]1)[C:3]([F:6])([F:5])[F:4].N1C=[CH:18][CH:17]=[CH:16][CH:15]=1.C([O:22][CH2:23][CH3:24])C>>[C:23]([O:1][CH:2]([C:7]1([CH2:11][CH2:12][CH3:13])[CH2:8][O:9][CH2:10]1)[C:3]([F:4])([F:5])[F:6])(=[O:22])[CH2:24][CH2:18][CH2:17][C:16]#[CH:15]参加物
実験手順
A mixture of hex-5-ynoic acid (1 g) and thionyl chloride (1.95 ml) in benzene (25 ml) was heated at reflux for 2.5 hours. The resulting solution was cooled and then evaporated in vacuo. The acid chloride thus obtained was taken up in dry diethyl ether (5 ml) and added, dropwise, to a stirred solution of 3-(1-hydroxy-2,2,2-trifluoroethyl)-3-n-propyloxetane (1.77 g) (European Patent Application No. 211598) and pyridine (0.8 ml) in ether (20 ml). The reaction mixture was allowed to stir at room temperature overnight. After washing with water, dilute hydrochloric acid, saturated sodium bicarbonate solution and brine, the organic phase was dried over anhydrous magnesium and then evaporated in vacuo. The residue was purified by chromatography on silica, pre-eluted with hexane containing 1% triethylamine. Gradient elution with hexane/ether mixtures gave 2,2,2-trifluoro-1-(3-propyloxetan-3-yl)ethyl hex-5-ynoate (1.2 g) as a colourless oil.
後処理
- additionadded
- washAfter washing with water, dilute hydrochloric acid, saturated sodium bicarbonate solution and brine
- dry with materialthe organic phase was dried over anhydrous magnesium
- customevaporated in vacuo
- customThe residue was purified by chromatography on silica
- washpre-eluted with hexane containing 1% triethylamine
- washGradient elution with hexane/ether mixtures
出典と根拠
- ORDレコード
- ord-4cc57f357eb0430b97d07f6419dd2311
- 出典データセット
- uspto-grants-1992_05
- 特許番号
- US05116862
反応ノート
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