Beilstein J. Org. Chem.2011,7, 156–166, doi:10.3762/bjoc.7.22
Grubbs II catalyst and 2 equiv of CuSO4, the cross-metathesis of terminal alkynes with ethyl vinyl ether led to the expected dienyl ether at 80 °C under microwave heating in toluene, whereas in H2O/t-BuOH conjugated enals were formed [70].
As already mentioned with dienes resulting from EYCM with
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Graphical Abstract
Scheme 1:
Interaction of triple bonds with a metal carbene.