Fig. 4
From: Enantioselective [3+3] atroposelective annulation catalyzed by N-heterocyclic carbenes
Scope of ynals. Reaction conditions: a mixture of 1g (0.11 mmol), 2d−t (0.10 mmol), nBu4NOAc (0.2 mmol), oxidant E (0.15 mmol), Mg(OTf)2 (20 mol%), and cat. A (15 mol%) in toluene (2.0 mL) was stirred at room temperature under N2 for 24 h
