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Highly enantioselective synthesis of dihydrocoumarin-fused dihydropyrans via the phosphine-catalyzed [4 + 2] annulation of allenones with 3-aroylcoumarins. Issue 22 (13th May 2016)
Record Type:
Journal Article
Title:
Highly enantioselective synthesis of dihydrocoumarin-fused dihydropyrans via the phosphine-catalyzed [4 + 2] annulation of allenones with 3-aroylcoumarins. Issue 22 (13th May 2016)
Main Title:
Highly enantioselective synthesis of dihydrocoumarin-fused dihydropyrans via the phosphine-catalyzed [4 + 2] annulation of allenones with 3-aroylcoumarins
Abstract : Phosphine-catalyzed [4 + 2] annulation between 3-aroylcoumarins and allenones has been developed. Abstract : Phosphine-catalyzed [4 + 2] annulation between 3-aroylcoumarins and allenones has been developed. In the presence of a dipeptide phosphine catalyst7, dihydrocoumarin-fused dihydropyrans were prepared in high yields and with excellent enantioselectivities.