Perform a retrosynthetic analysis by working backwards two steps in the synthesis below. Identify possible combinations of A and B that could lead to the alkyl halide (C).
A) B = I and A = VIII
B) B = VI and A = I
C) B = III and A = VII
D) B = IV and A = VII
E) B = V and A = VIII

Question

Perform a retrosynthetic analysis by working backwards two steps in the synthesis below. Identify possible combinations of A and B that could lead to the alkyl halide (C).   
A) B = I and A = VIII 
B) B = VI and A = I 
C) B = III and A = VII 
D) B = IV and A = VII 
E) B = V and A = VIII

Quizplus · Accepted Answer

Working backwards two steps, we can see that C was formed by the reaction of D and E. D was formed by the reaction of A and B. One possible combination of A and B that could lead to D (and thus C) is VII and IV, respectively. Therefore, the best choice is D.

Perform a Retrosynthetic Analysis by Working Backwards Two Steps in the Synthesis