Table 3.
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Reaction conditions: 4p (0.1 mmol), 2a–2f (0.2 mmol), Pd(OAc)2 (10 mol %), Ac-Gly-OH (20 mol %), AgOAc (0.3 mmol), HFIP (1 mL), 90 °C, 24h.
Isolated yield.
Regioselectivity were determined by 1H NMR analysis of the crude product and confirmed by one-dimensional selective NOESY experiments; the variance is estimated to be within 5%.