当前位置:首页>复习资料>【2026版化学步步高大二轮专题复习讲义专题九大题突破4有机合成与推断综合题的分析应用

【2026版化学步步高大二轮专题复习讲义专题九大题突破4有机合成与推断综合题的分析应用

  • 2026-02-16 15:00:22
【2026版化学步步高大二轮专题复习讲义专题九大题突破4有机合成与推断综合题的分析应用

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大题突破4 有机合成与推断综合题的分析应用

1 (2025·黑吉辽蒙,19)含呋喃骨架的芳香化合物在环境化学和材料化学领域具有重要价值。一种含呋喃骨架的芳香化合物合成路线如下:

回答下列问题:

(1)AB的化学方程式为。 

(2)CD实现了由的转化(填官能团名称)。 

(3)GH的反应类型为。 

(4)E的同分异构体中,含苯环(不含其他环)且不同化学环境氢原子个数比为321的同分异构体的数目有种。 

(5)MN的三键加成反应中,若参与成键的苯环及苯环的反应位置不变,则生成的与N互为同分异构体的副产物结构简式为。 

(6)参考上述路线,设计如下转化。X和Y的结构简式分别为。 

答案 (1)+CH3OH+H2O (2)羟基 醛基 (3)取代反应 (4)4 (5) (6) 

解析(1)A中含有羧基,可以与CH3OH在浓硫酸催化下发生酯化反应。(2)C的分子式为C7H8O2,不饱和度为4,结合前后物质的结构中均有苯环,可知C中除苯环外无不饱和结构,则C中含O的官能团只可能是羟基或醚键,结合CD的反应条件可知,CD发生了氧化反应,故D中的醛基由C中相同位置的羟基氧化而来,即CD中官能团的转化为羟基醛基,C的结构简式为。(3)F的分子式为C8H5BrO,G(C14H10O)比F多出的6C来自反应中加入的G中除CH外只有1O原子且无Br原子,说明F中的—Br中的—B(OH)2均在反应中脱去,因此G的结构简式为,对照GH的结构,G中五元环上的1H原子被中的Br取代,因此该反应为取代反应。(4)E的分子式为C8H6Br2O,不饱和度为5,E的同分异构体(记作E')中含苯环,则还剩余2C2Br1O1个不饱和度,根据不同化学环境氢原子个数比与氢原子总数可知,三种环境的氢原子个数分别为321,其中3个相同化学环境的H原子来自1个甲基,结合不饱和度为1可知,E'分子中有1个苯环、1个甲基、1C==O键、2个—Br,除C==O键外的基团能组成的符合题意的结构为,再将C==O键插入上述两结构中,可得到4种结构:。(5)如图N为碳碳三键中一条π键、右侧苯环上3C上的CH键发生的加成反应,其中3C上的H连接到1C上、3C连接到2C上得到N。根据题目要求,若3C连接到1C上、3C上的H连接到2C上,则可得到N的同分异构体。(6)由生成X的反应条件可知,第一步反应为卤代烃的消去反应,反应物中的2Br所连碳原子的邻位碳原子上均有H,消去后即得X()。

XY的反应条件与GH的相同,故XY发生类似GH的溴代反应;根据最终产物中的位置可推断Y中—Br的位置,则Y的结构简式为

2 (2024·黑吉辽,19)特戈拉赞(化合物K)是抑制胃酸分泌的药物,其合成路线如下:

已知:.Bn为,咪唑为;

.和不稳定,能分别快速异构化为和。

回答下列问题:

(1)B中含氧官能团只有醛基,其结构简式为。 

(2)G中含氧官能团的名称为。 

(3)JK的反应类型为。 

(4)D的同分异构体中,与D官能团完全相同,且水解生成丙二酸的有种(不考虑立体异构)。 

(5)EF转化可能分三步:E分子内的咪唑环与羧基反应生成X;X快速异构化为Y;Y与O反应生成F。第步的化学方程式为。 

(6)苯环具有与咪唑环类似的性质。参考EX的转化,设计化合物I的合成路线如下(部分反应条件已略去)。其中M和N的结构简式为。 

答案 (1) (2)(酚)羟基 羧基 (3)取代反应 (4)6 (5) (6) 

解析 AB发生反应生成C,根据AC的结构简式、B的分子式和B中含氧官能团只有醛基可知,BCD发生反应生成EE在乙酸酐的作用下发生成环反应生成FF发生两步连续反应生成G,根据G的分子式和H的结构可以推出,GG发生两步反应生成H,将羧基中的—OH取代为次氨基结构;HI发生取代反应生成J;最后J发生还原反应生成K。(4)D的同分异构体中,与D的官能团完全相同,说明有酯基的存在,且水解后生成丙二酸,说明主体结构中含有。根据D的分子式,剩余的C原子数为5,剩余H原子数为12,因同分异构体中只含有酯基,则不能将H原子单独连接在某一端的O原子上,因此将5个碳原子拆分。当一侧连接甲基时,另一侧连接—C4H9,共有4种同分异构体;当一侧连接乙基时,另一侧连接—C3H7,共有2种同分异构体,故满足条件的同分异构体有4+2=6种。(5)根据已知条件和题给信息,第步反应为酚羟基与乙酸酐的反应,生成F,则Y,根据异构化原理,X。第步的化学方程式为(CH3CO)2O。(6)N发生还原反应生成目标化合物,N

通过网盘分享的文件:2026版化学步步高大二轮专题复习【通用版】

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  1. CONNECT:[ UseTime:0.000956s ] mysql:host=127.0.0.1;port=3306;dbname=i_67808;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001664s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000611s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000619s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001600s ]
  6. SELECT * FROM `set` [ RunTime:0.000609s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001721s ]
  8. SELECT * FROM `article` WHERE `id` = 461156 LIMIT 1 [ RunTime:0.001178s ]
  9. UPDATE `article` SET `lasttime` = 1771281370 WHERE `id` = 461156 [ RunTime:0.005670s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000634s ]
  11. SELECT * FROM `article` WHERE `id` < 461156 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001088s ]
  12. SELECT * FROM `article` WHERE `id` > 461156 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001204s ]
  13. SELECT * FROM `article` WHERE `id` < 461156 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002178s ]
  14. SELECT * FROM `article` WHERE `id` < 461156 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.009000s ]
  15. SELECT * FROM `article` WHERE `id` < 461156 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001767s ]
0.193112s