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

HRID 481316ノート

反応式

HRID 481316 の反応式
[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

参加物

6

反応物 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

生成物 1

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

試薬・触媒・溶媒 1

HCID 3283Diethyl Ether溶媒

実験手順

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.

後処理

  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)

出典と根拠

ORDレコード
ord-660bd78de3dc4d0b8af325b0df3d975a
出典データセット
uspto-grants-1998_08
特許番号
US05789405

反応ノート

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