Methyl iodide → 5,6-Dimethoxy-4-[2-methyl-3-(3-methyl-2-butenyl)oxiranyl]-1-oxaspiro[2,5]octane

HRID 964356Notes

Reaction equation

HRID 964356 reaction equation
[OH:1][CH:2]1[CH2:9][CH2:8][C:5]2([O:7][CH2:6]2)[CH:4]([C:10]2([CH3:18])[CH:12]([CH2:13][CH:14]=[C:15]([CH3:17])[CH3:16])[O:11]2)[CH:3]1[O:19][CH3:20].O1CCC[CH2:22]1.[H-].[Na+].IC>C(OCC)C>[CH3:20][O:19][CH:3]1[CH:2]([O:1][CH3:22])[CH2:9][CH2:8][C:5]2([O:7][CH2:6]2)[CH:4]1[C:10]1([CH3:18])[CH:12]([CH2:13][CH:14]=[C:15]([CH3:17])[CH3:16])[O:11]1

Participants

6

Reactant 4

HCID 6328Methyl iodideHCID 8028TetrahydrofuranHCID 24758Sodium hydrideHCID 2190894-(1,5-Dimethyl-1,2-epoxy-4-hexenyl)-5-methoxy-1-oxaspiro(2.5)octan-6-ol

Product 1

HCID 149888645,6-Dimethoxy-4-[2-methyl-3-(3-methyl-2-butenyl)oxiranyl]-1-oxaspiro[2,5]octane

Reagents, catalysts & solvents 1

HCID 3283Diethyl EtherSolvent

Procedure

To a solution of 6-hydroxy-5-methoxy-4-[2-methyl-3-(3-methyl-2-butenyl) oxiranyl]-1-oxaspiro[2,5]octane (14.1 mg) in freshly distilled tetrahydrofuran (0.5 ml) was added sodium hydride (60% oil dispersion, 2.0 mg) in one portion in an ice bath. The suspension was stirred for half an hour at the same temperature and thereto iodomethane (71 mg) was added. After stirring for 2 hours at ambient temperature, the mixture was diluted with diethyl ether and washed with water. The organic layer was dried and evaporated to give a crude oil which was purified by column chromatography on silica gel eluted by a mixture of diethyl ether and n-hexane (1:2) to yield 5,6-dimethoxy-4-[2-methyl-3-(3-methyl-2-butenyl)oxiranyl]-1-oxaspiro[2,5]octane (14.2 mg) as an oil.

Workup

  1. stirringAfter stirring for 2 hours at ambient temperature
  2. washwashed with water
  3. customThe organic layer was dried
  4. customevaporated
  5. customto give a crude oil which
  6. customwas purified by column chromatography on silica gel
  7. washeluted by a mixture of diethyl ether and n-hexane (1:2)

Sources & evidence

ORD record
ord-e1de8b66f4b74849a5d345b05c91823e
Source dataset
uspto-grants-1998_06
Patent number
US05767293

Reaction notes

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