Multiple Choice
According to the 1,3-butadiene structure below, which positions would be best to place methoxy groups to yield the most reactive dimethoxy-1,3-butadiene isomer in the Diels-Alder reaction? 
A) c and d
B) a and c
C) b and c
D) a and d
E) a and f
Correct Answer:
Verified
Correct Answer:
Verified
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