Rhodium‐Catalysed Selective C−H Allylation of 1H‐Indazoles with Vinylethylene Carbonate: Easily Introducing Allylic Alcohol

Abstract An efficient rhodium(III)‐catalysed C−H activation of 3‐aryl‐1‐ H ‐indazoles with easily available vinylethylene carbonate has been reported. A series of allyl alcohol substituted 3‐aryl‐1‐ H ‐indazoles were obtained with broad functional groups tolerance and favourable stereoselectivity. Notably, C−H and C−O bonds were selectively activated in “one pot” manner, releasing CO 2 as the sole by‐product and avoiding external oxidant. This protocol provides a powerful approach for the post stage C−H allylation of indazole‐based substrates.