The role of cyclobutenes in gold(i)-catalysed skeletal rearrangement of 1,6-enynes
作者:Ana Escribano-Cuesta、Patricia Pérez-Galán、Elena Herrero-Gómez、Masaki Sekine、Ataualpa A. C. Braga、Feliu Maseras、Antonio M. Echavarren
DOI:10.1039/c2ob25419k
日期:——
electron-donating substituents at the alkyne undergo gold(I)-catalysed single cleavage skeletal rearrangement, whereas substrates with electron-withdrawing substituents evolve selectively to double cleavage rearrangement. Theoretical calculations provide a qualitative rationale for these effects, and suggest that bicyclo[3.2.0]hept-5-enes are involved as intermediates. We provide the first X-ray structural evidence
Co-Catalyzed Reductive Cyclization of Acrylate-Containing 1,6-Enynes
作者:Zhantao Yang、Shenyin Hou、Yunfan Cheng、Li Sun、Chun-Hua Yang
DOI:10.1021/acs.joc.2c01345
日期:2022.10.7
A Co-catalyzed reductive cyclization of acrylate-containing 1,6-enynes is reported, providing an approach to construct five-membered carbocyclic and heterocyclic scaffolds containing enol ethers and all-carbonquaternary carbons. This novel process enables an E/Z mixture of 1,6-enynes to react with good functional group tolerance and good isolated yields, in an operationally simple manner.