反応式
[OH:1][C:2]1[CH:3]=[C:4]([I:9])[CH:5]=[C:6]([OH:8])[CH:7]=1.[CH2:10](Br)[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1>>[CH2:10]([O:1][C:2]1[CH:3]=[C:4]([I:9])[CH:5]=[C:6]([O:8][CH2:10][C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)[CH:7]=1)[C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1参加物
3
実験手順
3,5-Dihydroxyiodobenzene (Tex. J. Sci., 1977, 28, 253) was reacted with two equivalents of benzyl bromide using the procedure described in Example 1 to give 3,5-dibenzyloxyiodobenzene as an oil in 96% yield. This was reacted with n-butyl-lithium using the procedure described in Note c. immediately above except that the reaction was carried out at -110° C. The organometallic reagent so formed was reacted with tetrahydropyran-4-one using the procedure described in that Note; the product was methylated and that product was hydrogenolysed using the procedure also described in Note c. immediately above. There was thus obtained 4-(3,5-dihydroxyphenyl)-4-methoxytetrahydropyran in 40% yield from 3,5-dibenzyloxyiodobenzene.
出典と根拠
- ORDレコード
- ord-55434b66df1c4a62ada785c0fe8c7bfd
- 出典データセット
- uspto-grants-1992_07
- 特許番号
- US05134148
関連ノート
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