What is the major product (s) of the following reaction? What are the major prod

Question

What is the major product (s) of the following reaction? What are the major products of the following reaction? A. I and II III and IV B. I, C I and III and IV D. II. What is the major product of this reaction? What is the best reagent to accomplish the following transformation? A, ethanol. H^+ B. Na, then ethanol C. Na, then bromoethane D bromoethane. H^+ What is the best reagent to accomplish the following transformation? A. Br_2 B. NaBr C. Br_2 and light D. PBr_3 What is the best reagent to accomplish the following transformation? A. KMnO_4 B. dilute H_2 SO_4 C. BH_3 THF, then H_2 O_2, OH D. cone. NaOH What is the best method to accomplish the following transformation? A. I) MCPBA 2) H B. I) dilute H_2 SO_4 2) H_2 O_2 OH

Explanation / Answer

Ans:

2. C = PCC act as an oxidizing agent and does not do over oxidation.

3. A = dehydration of alkene according to zaitsev rule (more substituted alkene is formed)

4. C = OTs makes -OH a good leaving group and then OEt- attacks in an SN2 way.

5. C = it is a WIlliamson ether synthesis

6. D

7. B = hydration of alkene to secondary alcohol according to markovnikov rule.

8. C = formationof cis-diol using OsO4, base.

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