Highly enantioselective Diels–Alder reac
✍
Shinji Harada; Nozomi Toudou; Shiharu Hiraoka; Atsushi Nishida
📂
Article
📅
2009
🏛
Elsevier Science
🌐
French
⚖ 389 KB
The synthesis and utility of the novel axially chiral bis-urea ligand BINUREA are described. A complex of this urea ligand with ytterbium triflate and DBU can be used in the catalytic enantioselective Diels-Alder reaction of Danishefsky-type diene and electron-deficient olefins to give the adducts i