反応式
[CH3:1][C:2]1[O:7][C:6](=[O:8])[CH:5]=[C:4]([O:9][CH2:10][C:11]2[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=2)[CH:3]=1.[CH:17]1[C:22]([CH:23]=O)=[CH:21][C:20]2[O:25][CH2:26][O:27][C:19]=2[CH:18]=1>>[O:27]1[C:19]2[CH:18]=[CH:17][C:22](/[CH:23]=[CH:1]/[C:2]3[O:7][C:6](=[O:8])[CH:5]=[C:4]([O:9][CH2:10][C:11]4[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=4)[CH:3]=3)=[CH:21][C:20]=2[O:25][CH2:26]1参加物
3
実験手順
6-methyl-4-(phenylmethoxy)-2H-pyran-2-one (known) was reacted with piperonal in accordance with Method C described above under II to form E-6-[2-(1,3-benzodioxol -5-yl)ethenyl]-4-(phenylmethoxy)-2H-pyran-2-one: C21H16O5; yield 39%, melting point 150 to 152° C. (acetone). This condensation product was hydrogenated in accordance with Method A described above under I. For cleaning purposes the product was taken up in ethyl acetate, was extracted therefrom with 2 N potassium hydroxide solution and was precipitated from the latter by acidification: C14H12O5; yield 67%, melting point 200 to 201° C. (isopropanol/water).
出典と根拠
- ORDレコード
- ord-a8fec576f22745a7811992b2137fde6f
- 出典データセット
- uspto-grants-2001_09
- 特許番号
- US06288109B1
関連ノート
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