Author/Authors :
Stokes، نويسنده , , Sean and Spears، نويسنده , , Ben and Laseter، نويسنده , , Cameron and Barker، نويسنده , , Bobby and Mead، نويسنده , , Keith T.، نويسنده ,
Abstract :
A two-step synthesis of tetrahydro-2H-furochromenones from 2H-chromenes is reported. The reaction of a series of tert-butyl 2-diazoacetate derivatives with 2H-chromenes, catalyzed by Rh2(OAc)4, generated cyclopropane intermediates that rearranged to γ-lactones on treatment with Sn(OTf)2.
Keywords :
?-Lactones , Cyclopropanation , ?-Diazocarbonyls , 2H-Chromenes
