Fig. 4: Scope with respect to the Pt(II)-catalyzed annulations.
From: Dichotomy of platinum(II) and gold(III) carbene intermediates switching from N- to O-selectivity
Reaction conditions: 1 (0.2 mmol), 2 (0.1 mmol), 10 mol% PtCl2 with 10 mol% L3 in 1 ml toluene at 70 °C for 12 h, unless otherwise noted. Isolated yields were listed. aIsomeric ratios were determined by 1H NMR of the crude product mixture.PMB para-methoxybenzyl, Ms methanesulfonyl, Ns 4-nitrobenzenesulfonyl, Bs 4-bromobenzenesulfonyl.
