Table 4 Scope of the PEDA reaction involving 1,1,2,2-tetrasubstituted olefins as dienophiles

From: Ti(Oi-Pr)4-promoted photoenolization Diels–Alder reaction to construct polycyclic rings and its synthetic applications

 
  1. ND not detected
  2. aMethod D: hv (λ max=366 nm), Ti(Oi-Pr)4 (3.0 equiv.), dienophile (0.4 mmol, 1.0 equiv.), diene (4.0 equiv.), dioxane (anhydrous and degassed)
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