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- Draw a stepwise mechanism for the following Robinson annulation. This reaction was a key step in a synthesis of the steroid cortisone by R. B. Woodward and co-workers at Harvard University in 1951.What products are obtained from the reaction of the attached compound with one equivalent of Br2, using FeBr3 as a catalyst?Draw all stereoisomers formed in each reaction.
- Draw the major organic product of the reaction. Ignore stereochemistryA key step in the synthesis of the narcotic analgesic meperidine (tradename Demerol) is the conversion of phenylacetonitrile to X. (a) What isthe structure of X? (b) What reactions convert X to meperidine ?(a) Draw a stepwise mechanism for the conversion of A to B. (b) What product would be formed if C was exposed to similar reaction conditions?