M.Sc. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2017.
THIRD SEMESTER
Chemistry
Paper I MODERN ORGANIC SYNTHESIS
2 20131-A
Time 3 Hours Max. Marks 70
SECTION — A
Answer any FIVE questions. 6 30 Marks)
1. Explain about Suplur Ylides.
2. Explain Arbusor reactions.
3. Explain protecting groups for amines.
4. Explain OBO formation.
5. Explain Kahne glycosidation.
6. Explain Baldwin rules.
7. Explain convergent synthesis.
8. Explain FGI.
SECTION — B
Answer ALL questions. 10 40 Marks)
9. Explain
Witting reaction
HSAB principle.
Or
Explain Emmons-wads worth reaction.

10. Explain Bayles Hillmann, umpolung reaction.
Or
Explain protecting groups for alcohols, ethers.
11. Explain PTC, Tandem synthesis.
Or
Explain determination of R/S configuration.
12. Explain Michael addition reaction with mechanism.

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