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. Author manuscript; available in PMC: 2015 Mar 6.
Published in final edited form as: Chemistry. 2013 Sep 3;19(39):12953–12958. doi: 10.1002/chem.201301731

Scheme 1.

Scheme 1

[CoII(Por)]-catalysed carbene carbonylation leading to ketene formation in one-pot tandem transformations producing amides, esters and β-lactams. DFT calculated relative free energies (ΔGo) in kcalmol−1 between brackets (Turbomole, BP86, def2-TZVP, employing Grimme’s disp3 dispersion corrections).