Novel findings concerning the mechanism of enyne metathesis reactions involving rearrangement are presented. It has been demonstrated that the presence of either oxygen or nitrogen at the propargylic position leads to opposite regioselectivities in the presence of a cross‐metathesis partner. The application of these reactions to domino processes is also described.
Nicht nur hochselektiv, sondern auch atomökonomisch verlaufen die meisten gekreuzten Olefinmetathesen zwischen gespannten und monosubstituierten Olefinen mit dem Grubbsschen oder Schrockschen Katalysator ([Ru] bzw. [Mo]; siehe unten) ‐selbst bei einem 1:1‐Verhältnis der beiden Reaktionspartner! Die hohe Toleranz gegenüber vielen funktionellen Gruppen könnte für Folgereaktionen interessant sein.
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