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 77643노트

반응식

HRID 77643 반응식
[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

참가 물질

4

반응물 1

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

생성물 1

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

시약·촉매·용매 2

HCID 23938Palladium촉매HCID 8857Ethyl Acetate용매

실험 절차

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 for: 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.

후처리

  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

출처 및 근거

ORD 기록
ord-93c4820e73864efb89113cfcea043796
출처 데이터셋
uspto-grants-2014_09
특허 번호
US08841326B2

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