Question

3. The following reactions used in organic syntheses involve pericyclic reactions. Illustrate the cyclic redistribution of electrons for the pericyclic reaction involved in each case and give the name of the type of reaction, e.g. [3,3] sigmatropic rearrangement, ene reaction, or [4+2] cycloaddition. Me ^ OMe Me + Ome 200°C, 12 h Оме ow.cssong reflux, 22 h hy acetophenone (sensitizer) Et,0, 36-48 h

Answer 1

hown solution » when Drene Reacted with dienophile gives u72 Cyclouddition Reaction - GF is known as Diets Alder Rection. w me + I Lome 7 moy o ome 4+2 ме Dienophile Cycloaddition Diel Alder Ryn 1 me Diene Diene . Alderen 13,37 Sigmarobic - Shift Reflux th ome so [3,3] Sigma tropic Shift ome 20: ene Reaction song

acetophenone (Sensitizer) product Etzo (36-48h) Radical Coupling STEPHYRISTOPHE a with ho and sensitizer radical Reaction occur After Radical formation radical coupling occur This also 2+2 Cyelo addition D o Product (2+2 Cyclo aditam) TITUTTET STREET