4-Methyl-1,7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione → 4-Methyl-1,7-bis(4-hydroxy-3-methoxyphenyl)heptane-3,5-dione

HRID 714158ノート

反応式

HRID 714158 の反応式
[CH3:1][CH:2]([C:16](=[O:28])[CH:17]=[CH:18][C:19]1[CH:24]=[CH:23][C:22]([OH:25])=[C:21]([O:26][CH3:27])[CH:20]=1)[C:3](=[O:15])[CH:4]=[CH:5][C:6]1[CH:11]=[CH:10][C:9]([OH:12])=[C:8]([O:13][CH3:14])[CH:7]=1>[Pd].C(OCC)(=O)C>[CH3:1][CH:2]([C:3](=[O:15])[CH2:4][CH2:5][C:6]1[CH:11]=[CH:10][C:9]([OH:12])=[C:8]([O:13][CH3:14])[CH:7]=1)[C:16](=[O:28])[CH2:17][CH2:18][C:19]1[CH:24]=[CH:23][C:22]([OH:25])=[C:21]([O:26][CH3:27])[CH:20]=1

参加物

4

反応物 1

HCID 695017674-Methyl-1,7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione

生成物 1

HCID 695017144-Methyl-1,7-bis(4-hydroxy-3-methoxyphenyl)heptane-3,5-dione収率 41.4%

試薬・触媒・溶媒 2

HCID 23938Palladium触媒HCID 8857Ethyl Acetate溶媒

実験手順

4-Methyl-1,7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione (6a, 0.20 g, 0.5 mmol) and palladium on activated carbon (0.25 g, 10%) were combined in ethyl acetate (100 ml). The mixture was placed under a hydrogen atmosphere (60 psi) on a Parr apparatus for 2 hr at room temperature. The resulting mixture was filtered through celite and the solvent evaporated to afford an oil. The crude oil was twice chromatographed on silica gel with ethyl acetate/hexane to give a semi-solid. The crude semi-solid was distilled bulb to bulb to give 80 mg (38%) of a pale yellow oil; 1H NMR: δ enol form: 1.69 (s, 3H), 2.72 (m, 8H), 3.83 (s, 6H), 5.48 (s, 2H), 6.69 (m, 4H), 6.79 (d, 2H, J=7.5 Hz); keto form: 1.23 (d, 3H, J=7.2 Hz), 2.72 (m, 8H), 3.57 (q, 1H, J=7.0 Hz), 3.83 (s, 6H), 5.48 (s, 2H), 6.69 (m, 4H), 6.79 (d, 2H, J=7.5 Hz); 13C NMR: δ 12.5, 29.2, 43.3, 55.9, 61.4, 111.0, 114.2, 120.7, 132.4, 143.9, 146.3, 206.1; Exact mass calcd for C22H26O6: 386.1729, observed (M+H) 387.1783.

後処理

  1. customfor 2 hr
  2. customat room temperature
  3. filtrationThe resulting mixture was filtered through celite
  4. customthe solvent evaporated
  5. customto afford an oil
  6. customThe crude oil was twice chromatographed on silica gel with ethyl acetate/hexane
  7. customto give a semi-solid
  8. distillationThe crude semi-solid was distilled bulb to bulb

出典と根拠

ORDレコード
ord-dd1ef123397449bab44735f05587c5d5
出典データセット
uspto-grants-2015_11
特許番号
US09187397B2

反応ノート

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