2. Answer BOTH parts a) and b). a) In the reaction below, the allenyl carbamate 9 is reacting in an aziridination reaction in the presence of a rhodium catalyst and iodosylbenzene (Ph-I=O). Draw the structure of the reaction product and propose a reason why iodosylbenzene is used here. NH2 Rh- catalyst 10 S Ph I=0 [10] b) Phenylallene 11 is reacting with AD-mix in a Sharpless asymmetric dihydroxylation reaction. Two products 12 and 13 are obtained whereas only the major product 12 is chiral. AD-mix 12 + 13 Ph 11 [6] 1) Identify the structures of compounds 12 (major product, chiral) and 13 (minor product, achiral). ii) Identify the reagents and describe the conditions necessary for the Sharpless asymmetric dihydroxylation reaction. [4]