Pyridine → HCID 86745875, compound

HRID 1587138Notes

Reaction equation

HRID 1587138 reaction equation
[Si]([O:8][CH:9]([CH2:37][CH2:38][CH2:39][O:40][Si](C(C)(C)C)(C)C)/[CH:10]=[CH:11]/[CH:12]=[C:13]1[C:17](=[O:18])[C:16]([S:19][CH3:20])=[CH:15][C:14]1([CH2:26][CH2:27][CH2:28][CH2:29][O:30][C:31]1[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=1)[O:21][Si](C)(C)C)(C(C)(C)C)(C)C.N1C=CC=CC=1.C(=O)([O-])O.[Na+]>C(#N)C>[OH:8][CH:9]([CH2:37][CH2:38][CH2:39][OH:40])/[CH:10]=[CH:11]/[CH:12]=[C:13]1[C:17](=[O:18])[C:16]([S:19][CH3:20])=[CH:15][C:14]1([OH:21])[CH2:26][CH2:27][CH2:28][CH2:29][O:30][C:31]1[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=1

Participants

5

Reactant 3

HCID 1049PyridineHCID 516892Sodium BicarbonateHCID 86745876HCID 86745876, compound

Product 1

HCID 86745875HCID 86745875, compoundYield 83.3%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

To a solution of 660 mg of 5-[(E)-4,7-bis(t-butyldimethylsilyloxy)-2-heptenylidene]-2-methylthio-4-(4-phenoxybutyl)-4-trimethylsilyloxy-2-cyclopentenone obtained in Example 570 dissolved in 50 ml of acetonitrile was added 4 ml of pyridine, under ice-cooling and stirring. A hydrogen-pyridine solution (2 ml) was added, and the mixture was stirred at 0° C. for 24 hours. The reaction mixture was poured onto saturated aqueous sodium hydrogencarbonate, and the mixture was extracted 3 times with ethyl acetate. The organic layers were combined, washed with saturated sodium chloride and dried over anhydrous magnesium sulfate. After filtration and concentration, the concentrate was subjected to silica gel column chromatography to give 320 mg (yield 83%) of 5-[(E)-4,7-dihydroxy-2-heptenylidene]-4-hydroxy-2-methylthio-4-(4-phenoxybutyl)-2-cyclopentenone.

Workup

  1. temperatureunder ice-cooling
  2. stirringthe mixture was stirred at 0° C. for 24 hours
  3. extractionthe mixture was extracted 3 times with ethyl acetate
  4. washwashed with saturated sodium chloride
  5. dry with materialdried over anhydrous magnesium sulfate
  6. filtrationAfter filtration and concentration

Sources & evidence

ORD record
ord-c1c1373a5d1949e99f4d75235b2fcc15
Source dataset
uspto-grants-1993_06
Patent number
US05216183

Reaction notes

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