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Beilstein J. Org. Chem. 2012, 8, 1765–1770, doi:10.3762/bjoc.8.201
Graphical Abstract
Scheme 1: Literature examples of intramolecular TMC [4 + 2] cycloadditions of diene-tethered alkynes.
Scheme 2: Reaction pathways of alkynyl halides in transition-metal-catalyzed reactions.
Scheme 3: Synthesis of diene-tethered alkynyl halides 1c and 1e.
Scheme 4: Synthesis of diene-tethered alkynyl halide 1g.
Scheme 5: Unsuccessful cycloaddition attempts with substrates with a 4-atom tether.