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100年 - 100 學士後西醫:有機化學#35480
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22. Which of the following compounds would be the major product from aldol condensation of 6-oxoheptanal?
答案:
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統計:
A(4), B(2), C(3), D(16), E(0) #1026907
詳解 (共 2 筆)
Metformin
B1 · 2024/06/08
#6124201
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大家加油! 邀請碼228480
B2 · 2025/12/10
#7221487
這個問題是關於分子內羥醛縮合反應 (I...
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其他試題
18. Assign E/Z nomenclature to the following alkene. (A) (1Z, 3Z, 5Z, 7Z) (B) (1E, 3E, 5Z, 7Z) (C) (1E, 3E, 5E, 7Z) (D) (3E, 5Z) (E) (3Z, 5Z)
#1026903
19. Which of the following is least likely to undergo a smooth crossed Claisen condensation with methyl pentanoate? (A) (CH3)3CCO2CH3 (B) PhCH2CO2CH3 (C) PhCO2CH3 (D) HCO2CH3 (E) (CH3O)2CO
#1026904
20. Which of the following pairs of compounds would be the most reasonable choice for an attempt at a "mixed" or "crossed" aldol condensation?(A)(B)(C)(D)(E)
#1026905
21. Which is the only one of these compounds which cannot self-condense in the presence of dilute aqueous alkali? (A) phenylethanal (B) propanal (C) 2,2-dimethylpropanal (D) 2-methylpropanal (E) 3-methylpentanal
#1026906
23. Which of the following Wittig reagents would be useful for converting R2C=O into R2CHCHO after hydrolysis? (A) Ph3P=CHOCH3 (B) Ph3P=CHCH3 (C) Ph3P=Cl2 (D) Ph3P=CHCH=CH2 (E) Ph3P=C(OCH3)2
#1026908
24. Reaction of ethylmagnesium bromide with which of the following compounds yields a tertiary alcohol after quenching with aqueous acid? (A) H2CO (B) CH3CHO (C) (CH3)2CO (D) ethylene oxide (E) n-butyllithium
#1026909
25. What starting materials would be suitable for preparing this compound by a combination of Michael and aldol reactions? (A) 4-methyl-2-cyclohexen-1-one and 3-butenal (B) 2-methylcyclohexane-1,3-dione and 3-buten-2-one (C) 2-methyl-2-vinyl-3-cyclohexen-1-one and acetaldehyde (D) 2-methyl-2-cyclohexen-1-one and 1,4-dichlorobutan-2-one (E) 4-methylcyclohexnone and methyl vinyl ketone
#1026910
26. The ozonolysis of limonene give compound A plus formaldehyde. Choose the correct structure for A
#1026911
27. Choose the endo product for the following reaction:
#1026912
28. Rank the following compounds in order of increasing reactivity towards chlorination with Cl2/AlCl3 (slowest reacting to fastest).
#1026913