l38 - OPP or Final Exam Exam Comprehensive: about ¼ from...

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Unformatted text preview: OPP or Final Exam Exam Comprehensive: about ¼ from each previous exam plus the new material. plus the new material Use the midterms as a guide to the material you should study. There will be about 100 points from multiple guess 100 questions plus about 80 points of written answer questions questions. Cover sheet will be like exam 3. D-aldohexose structures will also be given. Geranyl pyrophosphate Propose a biosynthetic pathway -pinene H+ OPP or OPP or Geranyl pyrophosphate Propose a biosynthetic pathway -pinene base: H -pinene What happens next? -terpinyl cation base: base: H A H B C D Terpenes OPP Farnesyl pyrophosphate py -terpinyl cation or -pinene Give a synthesis of isocomene A. I can do that B. I can not do that C. No one can do that H -carophyllene O O HO A O O B C O A B C O O OEt O O O A B C OEt A B C OEt O O O What’s Going On? OEt O OEt Diels Alder 4 + 2 Alder cycloaddition A Diels Alder 4 + 2 Alder cycloaddition A LUMO LUMO S A S 4 – the diene 2 – the dieneophile S HOMO HOMO 2 + 2 cycloaddition cycloaddition Is this allowed? A LUMO 2 + 2 cycloaddition cycloaddition Is this allowed? A LUMO h S HOMO HOMO A. Yes B. No S 2 + 2 cycloaddition cycloaddition Is this allowed? A HOMO LUMO A A. Yes B. No S O O S HOMO The photochemical reaction is allowed ti A B C Ph3PCH2 Ph3PCH2 O O O O HCl A B C A B C Ph3PCH2 O O HCl ...
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l38 - OPP or Final Exam Exam Comprehensive: about ¼ from...

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