Rhodium(III)-catalyzed heteroatom-directed C–H allylation with allylic phosphonates and allylic carbonates at room temperature

Add time:08/11/2019    Source:sciencedirect.com

The rhodium(III)-catalyzed mild and site-selective C–H allylation of 2-arylbenzo[d]thiazoles and 2-arylbenzo[d]oxazoles with allylic phosphonates and allylic carbonates is described. This transformation provides an efficient construction of C2-allylated, crotylated and prenylated 2-arylbenzo[d]thiazoles and 2-arylbenzo[d]oxazoles. In addition, this protocol can be applied to the formation of 2-arylbenzo[d]thiazole scaffolds containing an allylic alcohol group by using of 4-vinyl-1,3-dioxolan-2-one and vinyl oxirane as coupling partners.

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