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Combined yields of isolated product after column chromatography are given. The d.r. values were determined by GC-MS or 1H NMR analysis prior to purification. Piperidines were trapped with Boc2O prior to isolation. For details, see Supporting Information. CAAC = cyclic (alkyl)(amino)carbene. Dipp = 2,6-diisopropylphenyl.
[Rh(COD)Cl]2 (2 mol %).
5 wt % Pd/Al2O3 (4 mol %).
48 h.
H2 (50 bar).
H2 (20 bar).
iPrOH as solvent.
