Asymmetric synthesis of substituted chromanones via C–H insertion reactions of α-diazoketones catalysed by homochiral rhodium(II) carboxylates
Abstract
High levels of regio-, stereo- and enantio-selectivity are achieved in the asymmetric synthesis of six-membered oxygen heterocycles via intramolecular C–H insertion reactions of α-diazoketones catalysed by chiral rhodium(II) carboxylates.