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