Fig. 6
From: Enantioselective [3+3] atroposelective annulation catalyzed by N-heterocyclic carbenes
Postulated mechanistic pathways. Path A shows the formation of product 3. Path B suggests the formation of byproduct 4. Path C is a probable way to generate byproduct 5. Path D indicates a plausible route to explain the formation of byproduct 6
