Abstract:N-Heterocycle-assisted C–H activation/annulation
reactions have provided new concepts for the construction and transformation
of azacycles. In this work, we disclose a [5+1] annulation reaction
using a novel transformable pyridazine directing group (DG). The DG-transformable
reaction mode led to the construction of a new heterocyclic ring accompanied
by transformation of the original pyridazine directing group via a
C–H activation/1,4-Rh migration/double bond shift pathway,
affording the skeleton of pyridazino… Show more
“…The reported method included the reaction of anilines 59a with enynes 59b in the presence of chiral Rh-complex to form the corresponding aza cycles 59c in good yield and excellent enantioselectivity (Scheme 59). 92…”
Enantioselective cascades involving the reaction of the π-allyl complex have been a viable strategy, and further replacement of the customary allyl acetates with contemporary synthons has opened many opportunities in this escalating field.
“…The reported method included the reaction of anilines 59a with enynes 59b in the presence of chiral Rh-complex to form the corresponding aza cycles 59c in good yield and excellent enantioselectivity (Scheme 59). 92…”
Enantioselective cascades involving the reaction of the π-allyl complex have been a viable strategy, and further replacement of the customary allyl acetates with contemporary synthons has opened many opportunities in this escalating field.
An enantioselective [5 + 1] annulation of α-hydroxyl aryl ketones with cyclohexadienone-tethered enones via chiral dinuclear zinc catalysts is reported. A Brønsted base and Lewis acid cooperative activation model is...
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