Sulfonylpyrazole- and pyrazole-directed ortho-selective C–H functionalization/alkenylation and desulfenylative olefination of aryl(sulfonyl)pyrazoles

Abstract

ortho-Selective C–H alkenylation of arenes was achieved using (sulfonyl)pyrazoles as DGs, favored by combination of Pd(OAc)2 Boc-Sar-OH and silver acetate. Silver tetrafluoroborate gave de-sulfenylative olefinated products on sulfonylpyrazole.