Sodium Sulfite → 9-cis-4-Oxoretinoic acid

HRID 1634621ノート

反応式

HRID 1634621 の反応式
[CH3:1][C:2]1[CH:7]([OH:8])[CH2:6][CH2:5][C:4]([CH3:10])([CH3:9])[C:3]=1/[CH:11]=[CH:12]/[C:13](/[CH3:23])=[CH:14]\[CH:15]=[CH:16]\[C:17](\[CH3:22])=[CH:18]\[C:19]([OH:21])=[O:20].CC(OI1(OC(C)=O)(OC(C)=O)OC(=O)C2C=CC=CC1=2)=O.C([O-])(O)=O.[Na+].[O-]S([O-])=O.[Na+].[Na+]>C(Cl)Cl.CCOCC>[CH3:1][C:2]1[C:7](=[O:8])[CH2:6][CH2:5][C:4]([CH3:9])([CH3:10])[C:3]=1/[CH:11]=[CH:12]/[C:13](/[CH3:23])=[CH:14]\[CH:15]=[CH:16]\[C:17](\[CH3:22])=[CH:18]\[C:19]([OH:21])=[O:20]

参加物

7

反応物 4

HCID 24437Sodium SulfiteHCID 159087TriacetoxyperiodinaneHCID 516892Sodium BicarbonateHCID 20849244HCID 20849244、化合物

生成物 1

HCID 99729399-cis-4-Oxoretinoic acid収率 90%

試薬・触媒・溶媒 2

HCID 3283Diethyl Ether溶媒HCID 6344Dichloromethane溶媒

実験手順

To a solution of 4-hydroxy-9-cis-retinoic acid (16 mg, 0.05 mmole) in CH2Cl2 (1.5 ml) was added Dess-Martin reagent [see Dess and Martin in J. Org. Chem. 48:4155 (1983)] (42 mg, 0.1 mmole) in one portion at 25° C. After stirring for 5 minutes, the mixture was diluted with 10 ml of ether and to this was added saturated aqueous NaHCO3 (5 ml) containing Na2SO3 (55 mg). The mixture was stirred for 20 minutes to dissolve the solid and the layers separated. The ether layer was washed with H2O (2×5 ml), brine (5 ml) and dried (MgSO4). The solvent was recovered under reduced pressure and residue was subjected to flash column chromatography (silica, 60% ether in Hexane) to give 4-keto-9-cis-retinoic acid (14 mg. 90%), characterized as follows: TLC rf=0.6 (silica, 80% ether in hexane); 1HNMR (400 mHz, CDCl3) 6 7.05 (dd, J=16, 12 Hz, 1H, olefinic), 6.82 (d, J=16 Hz, 1 H, olefinic), 6.32 (d, J=16 Hz, 1H, olefinic), 6.30 (d, J=16 Hz, 1H, olefinic), 6.20 (d, J=12 Hz, 1H, olefinic), 5.80 (s, 1H, olefinic), 2.5 (t, J=7 Hz, 2H, CH2—CO), 2.31 (s, 3H, CH3), 2.01 (s, 3H, CH3), 1.9 (s, 3H, CH3), 1.89 (m, 2H, CH2), 1.20 (s, 6H, 2×CH3)

後処理

  1. stirringThe mixture was stirred for 20 minutes
  2. dissolutionto dissolve the solid
  3. customthe layers separated
  4. washThe ether layer was washed with H2O (2×5 ml), brine (5 ml)
  5. dry with materialdried (MgSO4)
  6. customThe solvent was recovered under reduced pressure and residue

出典と根拠

ORDレコード
ord-acb1ac20c6c74852b5eed01070129ad3
出典データセット
uspto-grants-2003_01
特許番号
US06506917B1

反応ノート

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