- 作者: 周善行 ; 孫德崢
- 作者服務機構: 輔仁大學化學系
- 中文摘要: The 2,3-disulfur-substituted 1,3-dienes (1) can be readily prepared from their stable 3-sulfolene precursors by thermal extrusion of SO/sub 2/. The Diels-Alder reaction of diene (1) with several dienophiles has been studied. The substituent effect on the reactivity and regioselectivity follows the order of PhS>PhSO>PhSO/sub 2/. Lewis acid can greatly increase the regioselectivity of this reaction. The diene (1c), bearing a strong electron-withdrawing sulfonyl group, also reacted as a dienophile.
- 英文摘要: --
- 中文關鍵字: Diels-Alder Reaction; 1,3-Butadiene; 2,3-Disulfur-Substituted 1,3-Butadiene; Thermal Extrusion
- 英文關鍵字: Diels-Alder反應;1;3-丁二烯;2;3-二硫取代- 1;3-丁二烯;熱擠壓