Copper(<scp>ii</scp>)-catalyzed cleavage of carbon–carbon triple bond to synthesize 1,2,3-triesterindolizines
作者:Jinwei Sun、Huayou Hu、Fuyao Wang、Hui Wu、Yun Liu
DOI:10.1039/c4ra06048b
日期:——
An efficient Cu(II)-catalyzed carbon–carbontriplebondcleavage protocol for the synthesis of 1,2,3-triesterindolizines via the reaction of pyridines with butynedioates has been developed. This reaction has perfect atom economy and both fragments from the cleaved alkyne are successively incorporated into the products.
We report a new copper-catalyzed [2 + 2 + 1] annulation process through the selective cleavage of sigma and triple C–C and C–Hbonds using two ynone units. This new methodology involves breaking multiple chemical bonds in a single operation, including C≡C, C–C, C–H, and N–O. These high-value adducts lead to a diverse collection of synthetically challenging trisubstituted indolizines by the simultaneous