| 題名: | Calix[4]quinone. Part 2: Intramolecular Michael-addition of calix[4]diquinone |
| 作者: | Yang KM
Lee MD
Chen RF
Chen YL
Lin LG |
| 貢獻者: | 化學系 |
| 關鍵詞: | calix[4]quinones
chlorine dioxide oxidation
Michael-addition |
| 日期: | 2001 |
| 上傳時間: | 2009-12-11 11:20:46 (UTC+8) |
| 摘要: | The oxidation of calix[4]arene dibenzoate 1 with chlorine dioxide yielded the corresponding calix[4]diquinone 2 and an intramolecular Michael-addition product 3. Reaction of diquinone 2 with ethylene glycol under acidic conditions produced the half-protected ketal derivative 4. The removal of benzoate moieties from compound 4 in basic conditions produced a phenoxide anion, which underwent intramolecular Michael-addition and yielded product 5. In acidic ketal cleavage conditions, the ketal moieties of product 5 were removed, but the intramolecular Michael-addition structure was maintained in the product 6. (C) 2001 Elsevier Science Ltd. All rights reserved. |
| 關聯: | TETRAHEDRON Volume: 57 Issue: 38 Pages: 8101-8105 |
| 顯示於類別: | [化學系所] 期刊論文
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