山东师范大学
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- 化合物A和B (C5H11N) 分别依次经碘甲烷、湿氧化银、加热处理后再经一次Hofmann彻底甲基化得烃C5H8, 后者经臭氧化、还原水解，都给出一分子丙二醛和两分子甲醛。A和B都不旋光，但B可拆分。试给出A和B的结构。
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- 化合物A和B (C8H11N) 经Hofmann彻底甲基化都得到三甲胺和C8H8, 后者经高锰酸钾氧化得苯甲酸. A的氢谱显示不含甲基，B则可以用天然酒石酸拆分. 推导A与B的结构.
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- C8H8OA 有碘仿反应. δH 7.94 (m, 2 H), 7.68-7.32 (m, 3 H), 2.59 (s, 3 H); δC 197.8, 137.2, 133.0, 128.6, 128.3, 26.5 ppm. νmax 1686(s), 1559, 1360, 761, 691 cm-1. m/z 120 (26), 105 (100), 77 (73), 51 (23). B 有银镜反应. δH 9.95(s, 1 H), 7. 76-7.32 (dd, 4 H), 2.42 (s, 3 H); δC 191.7, 145.4, 134.3, 129.8, 129.7, 21.7.νmax 1704(s), 1605, 810 cm-1. m/z 120 (91), 119 (96), 91 (100). 请推导化合物结构。
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- 古液(豆)碱(hygrine)(C8H15NO) 存在于古柯植物中, 不溶于氢氧化钠水溶液，但溶于盐酸；不与苯磺酰氯作用，但与苯肼成腙；与碘的氧化钠溶液作用产生黄色沉淀和羧酸 B(C7H13NO2)。B 用铬酸氧化得到古液酸 (C6H11NO2), 即 N-甲基-2-吡咯烷甲酸。试给出古液碱和B 的结构。
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- 四肽丙氨酰谷氨酰甘氨酰亮氨酸（Ala-Glu-Gly-Leu）完全水解与部分水解，写出产物的结构。
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- C5H10OA 有碘仿反应. δH 2.40 (t, 2 H), 2.13 (s, 3 H), 1.60 (sext, 2 H), 0.93 (t, 3 H); δC 208.9, 45.7, 29.8, 17.4, 13.7. νmax 2966, 2879, 1717(s), 1367. m/z 86(20), 71(11), 58(10), 43(100).B 无碘仿反应. δH 2.44 (q, 4 H), 1.06 (t, 6 H) ppm; δC 212, 35.5, 7.9. νmax 2979, 1716(s), 1461, 1369 cm-1. m/z 86 (21), 57 (100), 29 (59.4).请推导化合物结构。
- Michael加成主要发生在取代较多的α-碳上。 （ ）
- 4n电子体系的电环化，热反应对旋、光反应顺旋。（ ）
- 卤代酸的酸性较其母体酸的酸性强。 （ ）
- α, β-不饱和酸加成HX等试剂，不论亲电还是亲核，都是马氏加成。 （ ）
- 胺氮-氢的酸性强弱取决于电离产生的氮负离子(共轭碱)的稳定性，越稳定、越容易电离，酸性越强。（ ）
- Mannich 反应中构造不对称的酮, 反应主要发生在取代较多的α-碳上。 （ ）
- Claisen-Schmidt 缩合中碱缩合主要发生在取代较少的α-碳上，酸缩合主要发生在取代较多的α-碳上。 （ ）
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A:对 B:错
A:对 B:错
A:错 B:对
A:错 B:对
A:错 B:对
A:错 B:对
A:对 B:错
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