Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 23, Issue 7, Pages 1634-1644Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201604585
Keywords
alkylidenecyclobutanes; allylboration; boron; cross-coupling; cyclobutenes
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Funding
- Chemical Industry Fund through a Liebig-Stipendium
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Our recent studies of the diastereo- and enantioselective formation of strained alkylidenecycloalkanes drove us to more-thoroughly investigate the formation of four-membered rings for which only few efficient methods are described. We first developed a strategy to diversify the saturated part of the four-membered ring and applied it to a highly diastereoselective synthesis of more-elaborate alkylidenecyclobutanes, which completed our precedent studies. In parallel, cyclobutene structures were built employing simple organometallic methods and further functionalized to give a diverse range of new substitution patterns, which consequently enriched the pool of cyclobutene-based building blocks.
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