Rh(iii)-catalysed C–H annulation of cis-stilbene acids with 2-diazo-1,3-diketones: facile access to 6,7-dihydrobenzofuran-4(5H)-one and α-pyrone scaffolds

The establishment of this protocol provides fused dihydrofurans and α-pyrones from medicinally important scaffolds like cis -stilbenes employing an acid as a directing group via C–H activation.