Question

tion 5 continued) c. Anthracene is known to act as the diene in Diels-Alder read as maleic anhydride as shown below. Draw the str reaction and draw a reasonable mechanism illustrating its comma explanation for the observed regioselectivity. he diene in Diels-Alder reactions with dienophiles such s shown below. Draw the structure of the major product of this nechanism illustrating its formation. Give a brief [4 marks) Propose a detailed mechanism for the following two transformations. Use curved arrows to show movement of electron pairs and be sure to draw structures of all important reaction intermediates. State the names of the reactions below. aq. NaOH CH3 ÇH OH ÇOOH Men CHO Meo. 1. xs. KOH Meo 2. H₂O* ii. 2 12 x 5 yarks)

Answer 1

monoh Job in rolü * Diene and dienophile aligned directly over each other gives the endo Product

NaoH Keto-enol Tautomerison - It is an intra molecular aldol Condensation.

Lore Mea TO + Dome L Il rapid H ago the exchange Meo Tome → It is a Cami zaro 9eaction. Carbonyl Compounds having no &- hydrogens on treating with 50%. KOH or Nooth undergo a Self ondation – reduction reaction to form an alcohol and carboxylic acid 4