53. What product would you expect from the following reaction?
(A)
(B)
(C)
(D)
(E) no reaction

77. Stereoisomers I and II undergo E2 elimination on treatment with sodium ethoxide in ethanol. One isomer reacts 500 times faster than the other. Also, one isomer gives X as the only product, whereas the other gives Y together with some X. Which of the following statements provides the best assignment of I and II?  (A) II reacts faster and gives both Y and X (B) II reacts faster and gives only X (C) I reacts faster and gives both Y and X (D) I reacts faster and gives only Y (E) I reacts faster and gives only X

34. Provide the structure of the major product which results in the following reaction. (A)(B)(C)(D)(E) no reaction

5. What is the major product of the following reaction?

35. To answer the following question, consider the reaction below: The dehydration of alcohol by reaction with POCl3 in pyridine is an example of: (A) E1 process (B) SN1 process (C) E2 process (D) SN2 process (E) None of above.

33. 下列消去反應(Elimination Reaction)所產生的主要產物，那一個不正確？

54. What product would you expect from the following reaction? (A) (B) (C) (D) (E)

55. Provide the reagents to complete the following transformation. (A) LiAlH4, Et2O (B) Mg/THF (C) H2NNH2, KOH (D) CH3PPh3Br, LDA (E) None of the above

56. What reactants would be required to prepare the oxime shown below? (A) (B) (C) (D) (E) None of these reactants

57. What is the major product for the following reaction? (A) (B) (C) (D) (E)

58. What is the major product for the following reaction?(A) (B) (C) (D) (E)

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