1. Predict the major organic product(s) corresponding to each letter. Show stereochemistry where necessary.
2. Predict the reagent(s) corresponding to each letter. Show stereochemistry where necessary.
3. Propose the reaction mechanism for the following reactions.
4. When cyclopentene was treated with bromine in methanol as solvent, dibromide U and co-halogenation product V were observed.
(a) Explain briefly the formation of anti-dibromide U instead of syn-dibromide in this reaction with the aid of reaction mechanism.
(b) Account for the formation of co-halogantion product V in this reaction.
(c) Suggest a modification to the reaction condition such that ONLY dibromide U would be formed.
(d) Suggest a modification to the reaction condition such that ONLY co-halogenation product V would be formed.
(e) Predict the structures of the major co-halogenation product in the following reactions:
5. Propose the synthesis for the target compounds from the indicated starting materials.
