Ligand‐Accelerated Asymmetric [1,2]‐Stevens Rearrangment of Sulfur Ylides via Decomposition of Diazomalonates Catalyzed by Chiral Bisoxazoline/Copper Complex

Abstract magnified image The first example of catalytic asymmetric [1,2]‐Stevens rearrangement reaction of 1,3‐oxathiolanes with diazomalonates has been developed and up to 90% ee is achieved by the bisoxazoline 4e /copper(II) triflate [Cu(OTf) 2 ] complex.