Expedient catalytic construction of azabicyclo[4.1.0]/[5.1.0] carbaldehydes via intramolecular cyclopropanation
2015
Abstract Three types of aza-bicycles, 3-azabicylo[4.1.0]heptane-6-carbaldehyde, 3-azabicylo[4.1.0]heptane-1-carbaldehyde, and 3-azabicyclo[5.1.0]octane-7-carbaldehyde, are constructed conveniently from corresponding carbene progenitors of N -allyl or N -homoallyl triazoles. Yields are modest to high. These transformations feature a key rhodium catalyzed intramolecular cyclopropanation of the pendent C–C double bond and show complete stereo specificity.
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