Ethylene Glycol → (3'aR,6'aS)-hexahydro-1'H-spiro(1,3-dioxolane-2,2'-pentalen)-5'-one
反応式
[CH2:1]1[C@@H:8]2[C@@H:4]([CH2:5][C:6](=[O:9])[CH2:7]2)[CH2:3][C:2]1=[O:10].[CH2:11](O)[CH2:12][OH:13].CC1C=CC(S(O)(=O)=O)=CC=1.O>C1(C)C=CC=CC=1>[CH2:1]1[C@H:8]2[C@H:4]([CH2:5][C:6](=[O:9])[CH2:7]2)[CH2:3][C:2]21[O:13][CH2:12][CH2:11][O:10]2参加物
6
実験手順
cis-Tetrahydropentalene-2,5(1H,3H)-dione (5 g, 36 mmol) and ethylene glycol (2.3 g, 36 mmol) were dissolved in toluene. To the resulting solution was added PTSA (684 mg, 3.6 mmol). The reaction mixture was refluxed for 12 h meanwhile the resulting water was removed away. Direct chromatography on silica gel gave 2.0 g (11 mmol, yield: 31%) of the desired product, (3a′R,6a′S)-tetrahydro-1′H-spiro[1,3-dioxolane-2,2′-pentalen]-5′(3H)-one: MS (m/e): 183 (M+1)+.
後処理
- customwas removed away
出典と根拠
- ORDレコード
- ord-42fd19ac66a54a9f87b582d48e1e3219
- 出典データセット
- uspto-grants-2011_07
- 特許番号
- US07985730B2
反応ノート
読み込み中…