Pyridine → HCID 131718286, compound

HRID 1492674Notes

Reaction equation

HRID 1492674 reaction equation
C(O[CH2:5][C:6]1[C@H:7]2[CH2:20][CH2:19][C@@H:18]([CH3:21])[C@H:8]2[C@H:9]([O:12][CH:13]([O:15][CH2:16][CH3:17])[CH3:14])[O:10][CH:11]=1)(=O)C.N1C=CC=CC=1.[H][H]>C(OCC)(=O)C.[C].[Pd]>[CH2:16]([O:15][CH:13]([O:12][C@H:9]1[C@@H:8]2[C@H:18]([CH3:21])[CH2:19][CH2:20][C@@H:7]2[C:6]([CH3:5])=[CH:11][O:10]1)[CH3:14])[CH3:17]

Participants

6

Reactant 3

HCID 1049PyridineHCID 131718285HCID 131718285, compoundHCID 178418361HCID 178418361, compound

Product 1

HCID 131718286HCID 131718286, compoundYield 82%

Reagents, catalysts & solvents 2

HCID 178418390HCID 178418390, compoundCatalystHCID 8857Ethyl AcetateSolvent

Procedure

(1S, 4aS, 7R, 7aR)-4-(acetoxymethyl)-1-[1(ethoxy)ethoxy]-1,4a,5,6,7,7a-hexahydro-7-methylcyclopenta[c] pyran (65 mg, 0.00024 mol) obtained in Example 26 was dissolved in 3 ml of ethyl acetate, and 0.05 ml of pyridine and 10% palladium carbon (3 mg) were added. The reaction mixture was stirred for 24 hours in a hydrogen gas atmosphere of 1 atm. After the catalyst was removed by celite filtration, concentration was effected. The residual matter was purified by chromatography using silica gel, and the solvent of the fraction obtained from hexane:ether=8:2 eluent was distilled off. A colorless oily substance was thus obtained, i.e., (1S, 4aS, 7R, 7aR)-1-[1-(ethoxy)ethoxy]-1,4a,5,6,7,7a-hexahydro-4, 7-dimethylcyclopenta[c]pyran (43 mg, yield=82%). This (1S, 4aS, 7R, 7aR)-1-[1-(ethoxy)ethoxy]-1,4a,5,6,7,7a-hexahydro-4,7-dimethylcyclopenta[c]pyran had the following physicochemical properties:

Workup

  1. customAfter the catalyst was removed by celite filtration, concentration
  2. customThe residual matter was purified by chromatography
  3. customthe solvent of the fraction obtained from hexane
  4. distillationether=8:2 eluent was distilled off
  5. customA colorless oily substance was thus obtained

Sources & evidence

ORD record
ord-fbfb0019528f4c039afc4a324867fdef
Source dataset
uspto-grants-1994_12
Patent number
US05374653

Reaction notes

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