EK 1001 Orgo Question 591

[sillyjoe]

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Would someone please explain to me why the answer is A (1,2 addition) and not B (1,4 addition)?

When I go to this website it seems to say that this mechanism is a 1,4 conjugate addition. What am I missing?

 

[browncomputer]

In the EK forum, Dr. Johnson said this, "We clarified this in another post, it should be 1,4."