catalysis and hydrogen atom transfer to achieve the alkylation of 2H-benzothiazoles with alcohols, ethers, lactams, amides and alkane, which features broad substrate scope and excellent functional group compatibility. Notably, alcohols can be used not only as hydroxyalkylating reagents, but also as dehydroxyalkylating reagents in this regulable alkylation protocol. The previous elusive self-photocatalytic
Cu-Catalyzed Cross-Dehydrogenative Coupling Reactions of (Benzo)thiazoles with Cyclic Ethers
作者:Zengyang Xie、Yuping Cai、Hongwen Hu、Chen Lin、Juli Jiang、Zhaoxu Chen、Leyong Wang、Yi Pan
DOI:10.1021/ol4022113
日期:2013.9.6
Copper-catalyzed cross-dehydrogenative coupling (CDC) reactions of (benzo)thiazoles with cyclic ethers were developed under mild conditions. In particular, the formation of C-C bonds via the CDC reactions between non-benzo-fused azoles and ethers are reported for the first time. In addition, the acetals, known as the masked 2-thiazolecarboxaldehydes, could be successfully obtained by this CDC reaction. The preliminary mechanism and supportive DFT calculations are discussed as well.