Asymmetric synthesis of spirocyclic isobenzofuranones <i>via</i> a squaramide-catalysed sulfa-Michael desymmetrisation reaction
作者:Tamanna、Deepak Sharma、Pankaj Chauhan
DOI:10.1039/d3ob00126a
日期:——
Enantioselective synthesis of spirocyclohexenone isobenzofuranones has been achieved through an organocatalysed sulfa-Michael desymmetrisation reaction. A cinchona-derived squaramide effectively promotes the desymmetrisation of spirocyclic 2,5-cyclohexadienone isobenzofuranones via the controlled addition of various aryl thiols to generate two vicinal stereocenters with perfect diastereoselectivities