Te de ine ir endoexo addition endoexo s ubstitue

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Unformatted text preview: point nts t oward die ne Usually faster, even though product less stable: Kinetic control DAF11 Anothe e ple r xam : CH 3 CH 3 H 3C Endo CN NC NC H H o H3C CN http://csi.che ie m .tu-darm stadt.de /ak/im e m l/ Ge rally: ne o i i A o i A A + A WalbaC tF Dylan o i Re asons for e rulecom x. ndo ple LipshutzC tF S govia e Alkynes as Dienophiles Alkynes Ge rate1,4-cyclohe ne xadie s ne CO 2CH 3 + CO2 CH 3 75% CO 2CH 3 CO2 CH 3 CH2 O2 CH 3 C re an act again again CH2 O2 CH 3 2. Ele ctrocyclic Re actions: I ntramolecular ring closureand ope nings closure TheC ne ne The yclobute 1,3-Butadie Equilibrium Δ, Ea = 32.9 kcal 32.9 m -1 ol Exothe ic (ring rm strain re ase strain le d) hυ Light drive C be the odynam . n: an at rm ics Light Wave ngth de nde (can go e r le pe nt ithe way). way). Im e ml The1,3-C yclohe xadie 1,3,5ne The He xatrie Equilibrium ne He Light drive C be the odynam . n: an at rm ics Wave ngth de nde (can go e r le pe nt ithe way). way). Δ, Ea = 29.9 kcal 29.9 m -1 ol Endothe ic rm En...
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