Which of the following dienophiles is the most reactive with buta-1,3-

1.	Which of the following dienophiles is the most reactive with buta-1,3-diene?
Answer» Solution :Compound (c) is the dienophile with the BEST COMBINATION of low steric HINDRANCE and a low-energy LUMO (which is caused by the electron-withdrawing anhydride RESIDUE),

Discussion