資料載入中.....
|
請使用永久網址來引用或連結此文件:
http://ir.ncue.edu.tw/ir/handle/987654321/15023
|
題名: | The Synthesis of Naphthosultine and Benzodisultines and Their Py Rolysis with Dienophiles: Studies on o-Naphthoquinodimethane and Bis-o-Quinodimethane |
作者: | Wu, An-Tai;Liu, Wen-Dar;Chung, Wen-Sheng |
貢獻者: | 化學系 |
日期: | 2002-02
|
上傳時間: | 2013-01-07T01:47:32Z
|
出版者: | 中國化學學會 |
摘要: | Sealed tube reactions of the naphthosultine 8 with a series of electron-deficient dienophiles (fumaro - nitrile, N-phenylmaleimide, dimethyl fumarate, and dimethyl acetylenedicarboxylate) intoluene at 180 �C gave corresponding 1:1 cycloadducts 11-14 in various amounts along with rearranged naphthosulfolene 7 in 67-95% yields. The reaction of 1,2,4,5-tetra(bromomethyl)benzene with Rongalite (so dium form aldehyde sulfoxylate) and tetrabutylammonium bromide in DMF gave benzodisultines 17 and 18 in a combined yield of 56%. Sealed tube reactions of benzodisultines 17 and 18 with a series of dienophiles in xylene at 200 C gave corresponding 1:1 and 1:2 cycloadducts 20-27. The results suggested that thermalextrusion of sulfur dioxide from these sultines led to ei ther o-naphthoquinodimethane 6 (from 8) or bis-o-quinodimethane 19 (from 17 and 18); subsequent trapping of these reactive in termediates by dienophiles and SO2 gave various 1:1 and 1:2 Diels-Alder adducts in modest to excellent yields. |
關聯: | J. Chin. Chem. Soc., 49(1): 77-82 |
顯示於類別: | [化學系] 期刊論文
|
文件中的檔案:
檔案 |
大小 | 格式 | 瀏覽次數 |
index.html | 0Kb | HTML | 610 | 檢視/開啟 |
|
在NCUEIR中所有的資料項目都受到原著作權保護.
|