| 1,1-二氯-4,8-二甲基-1,3,7-壬二烯的酸催化环化反应 |
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| 引用本文： | 许临晓,陶凤岗,吴钧和. 1,1-二氯-4,8-二甲基-1,3,7-壬二烯的酸催化环化反应[J]. 高等学校化学学报, 1984, 5(6): 836 |
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| 作者姓名： | 许临晓 陶凤岗 吴钧和 |
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| 作者单位： | 复旦大学化学系 |
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| 摘 要： | 在多烯的酸催化环化反应中,类似于Ⅰ的结构的单萜类衍生物的酸催化环化产物通常均为α-和β-异构体的混合物,如由柠檬酸制备环柠檬醛[1],由伪紫罗兰酮制备紫罗兰酮[2],…….虽然依具体反应条件的不同,两种异构体的比例可以有所改变,但欲得到无双键异构的单一产物往往比较困难.
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| 收稿时间： | 1983-03-09 |
Acid-Catalyzed Cyclization of 1,1-Dichloro-4,8-Dimethylnona-,3,7-Triene |
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| Xu Linxiao,Tao Fenggang,Wu Junhe. Acid-Catalyzed Cyclization of 1,1-Dichloro-4,8-Dimethylnona-,3,7-Triene[J]. Chemical Research In Chinese Universities, 1984, 5(6): 836 |
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| Authors: | Xu Linxiao Tao Fenggang Wu Junhe |
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| Affiliation: | Department of Chemistry, Fudan University, Shanghai |
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| Abstract: | Cyclization of 1,1-dichloro-4, 8-dimethylnona-1, 3, 7-triene (Ⅳ) under the catalysis of boron trifluoride-etherate at room temperature gave a-isomer (Ⅴ) as the unique product in 90% yield. It was suggested that the cause leading to above result may be much more steric strain due to intramolecular crowding with the bulky dichlorovinyl group and adjacent three methyl groups in β-isomer (Ⅵ) than in a-isomer (Ⅴ), |
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