Dimethyl Sulfide → Epothilone A

HRID 392472

Reaktionsgleichung

Reaktionsgleichung von HRID 392472
[CH3:1][C:2]1[S:6][CH:5]=[C:4](/[CH:7]=[C:8](/[C@H:10]2[O:27][C:25](=[O:26])[CH2:24][C@H:23]([OH:28])[C:22]([CH3:30])([CH3:29])[C:20](=[O:21])[C@H:19]([CH3:31])[C@@H:18]([OH:32])[C@@H:17]([CH3:33])[CH2:16][CH2:15][CH2:14][CH:13]=[CH:12][CH2:11]2)\[CH3:9])[N:3]=1.C(C(C)=[O:39])(F)(F)F.OS([O-])(=O)=O.[K+].C([O-])(O)=O.[Na+].CSC>CC#N.C(N(CC([O-])=O)CC(O)=O)CN(CC([O-])=O)CC(O)=O.[Na+].[Na+].O>[CH3:1][C:2]1[S:6][CH:5]=[C:4](/[CH:7]=[C:8](/[C@H:10]2[O:27][C:25](=[O:26])[CH2:24][C@H:23]([OH:28])[C:22]([CH3:30])([CH3:29])[C:20](=[O:21])[C@H:19]([CH3:31])[C@@H:18]([OH:32])[C@@H:17]([CH3:33])[CH2:16][CH2:15][CH2:14][C@H:13]3[O:39][C@H:12]3[CH2:11]2)\[CH3:9])[N:3]=1

Komponenten

9

Edukt 5

HCID 1068Dimethyl SulfideHCID 9871Methyl trifluoromethyl ketoneHCID 516892Sodium BicarbonateHCID 516920Potassium bisulfateHCID 9891226Epothilone C

Produkt 1

HCID 448799Epothilone AAusbeute 57 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 962WaterLösungsmittelHCID 6342AcetonitrileLösungsmittelHCID 8759EDTA disodium saltLösungsmittel

Versuchsvorschrift

To solution of epothilone C (100 mg, 0.21 mmol) in CH3CN (2.5 mL) and 0.0004 M Na2EDTA (1.5 ml) at 0° C. were added excess CF3COCH3 (1 mL) followed by 2 KHSO5.KHSO4.K2SO4 (potassium peroxymonosulfate) (325 mg, 0.53 mmol) and NaHCO3 (75 mg, 0.89 mmol). The reaction mixture was stirred for 35 min then treated with dimethylsulfide (0.50 mL) and water (3.75 mL). The reaction mixture was warmed to room temperature, extracted with EtOAc (4×10 mL), dried over MgSO4, filtered, and concentrated. The residue was chromatographed with 55% EtOAc/hexanes to give epothilone A (59 mg, 57%) and compound A (30 mg, 29%) as a white solid. m/z: 494(M+H)+.

Aufarbeitung

  1. extractionextracted with EtOAc (4×10 mL)
  2. dry with materialdried over MgSO4
  3. filtrationfiltered
  4. concentrationconcentrated
  5. customThe residue was chromatographed with 55% EtOAc/hexanes

Quellen und Nachweise

ORD-Eintrag
ord-0a21c547423249eeab153057c21af7e4
Quelldatensatz
uspto-grants-2004_10
Patentnummer
US06800653B2

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