Direct Alkynylation of Thiophenes: Cooperative Activation of TIPS-EBX with Gold and Brønsted Acids
作者:Jonathan P. Brand、Jérôme Waser
DOI:10.1002/anie.201003179
日期:——
United we stand! Cooperativeactivation of the hypervalent‐iodine reagent TIPS‐EBX with a gold catalyst and a Brønstedacid allowed the first direct ethynylation of thiophenes at room temperature (see scheme; TFA=trifluoroacetic acid). The obtained ethynylthiophenes are important building blocks for organic dyes and electronic materials.