Table 2.
Influence of the Nitrene Precursor on Chemoselectivity
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Total NMR yield; Cl3CCHCl2 as the internal standard. Conditions: 5 equiv of 1, 1 equiv of 2, 10 mol % of AgOTf, 12 mol % of ligand, 4 Å MS, CH2Cl2, rt. tBu3tpy catalyst A: 3.5 equiv PhIO, 4 h; tpa catalyst B:1.2 equiv of PhIO, 30 min.