Hydroxyamine hydrochloride → 2-{[(2R)-1-(benzyloxy)hex-4-en-2-yl]oxy}-N-hydroxyethanimine

HRID 1852518ノート

反応式

HRID 1852518 の反応式
[CH2:1]([O:8][CH2:9][C@H:10]([O:15][CH2:16][CH:17]=O)[CH2:11][CH:12]=[CH:13][CH3:14])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C([O-])(=O)C.[Na+].Cl.[NH2:25][OH:26]>C(O)C>[CH2:1]([O:8][CH2:9][C@H:10]([O:15][CH2:16][CH:17]=[N:25][OH:26])[CH2:11][CH:12]=[CH:13][CH3:14])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

参加物

5

反応物 3

HCID 443297Hydroxyamine hydrochlorideHCID 517045Sodium AcetateHCID 86701082{[(2R)-1-(benzyloxy)hex-4-en-2-yl]oxy}acetaldehyde

生成物 1

HCID 867010832-{[(2R)-1-(benzyloxy)hex-4-en-2-yl]oxy}-N-hydroxyethanimine

試薬・触媒・溶媒 1

HCID 702Ethanol溶媒

反応条件

温度
60 °C

実験手順

To a mixture of {[(2R)-1-(benzyloxy)hex-4-en-2-yl]oxy}acetaldehyde (C11) (207 g, ≦0.63 mol) and sodium acetate (342 g, 4.17 mol) in aqueous ethanol (2:1 ethanol/water, 2.1 L) was added hydroxylamine hydrochloride (207 g, 2.98 mol). The reaction mixture was stirred at 60° C. for 18 hours, then concentrated in vacuo and extracted with ethyl acetate (2.0 L). The combined organic layers were dried over sodium sulfate, filtered, concentrated under reduced pressure and purified by chromatography on silica gel (Eluent: ethyl acetate in petroleum ether) to afford the product as a brown oil. By 1H NMR, this was assigned as a mixture of geometric isomers at both the oxime and olefin functional groups. Yield: 117 g, 0.444 mol, 70% over three steps. 1H NMR (400 MHz, CDCl3), characteristic peaks: δ [7.42-7.48 (m) and 6.88-6.92 (m), total 1H], 7.20-7.36 (m, 5H), 5.29-5.61 (m, 2H), [4.48-4.54 (m) and 4.41-4.45 (m), total 3H], 2.13-2.32 (m, 2H), 1.54-1.65 (m, 3H).

後処理

  1. concentrationconcentrated in vacuo
  2. extractionextracted with ethyl acetate (2.0 L)
  3. dry with materialThe combined organic layers were dried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. custompurified by chromatography on silica gel (Eluent: ethyl acetate in petroleum ether)

出典と根拠

ORDレコード
ord-ba1f163b04b54a1c808818f00cf51996
出典データセット
uspto-grants-2015_02
特許番号
US08962616B2

反応ノート

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