1. Exploring the limitations of the MacDonald '3 + 1' condensation in the preparation of porphyrins with fused electron-withdrawing heterocyclic rings: Synthesis of a bis(thiadiazolo)benzoporphyrin and a related benzocarbaporphyrin. Issue 48 (26th November 2020) Authors: Cillo, Catherine M.; Geiger, Mark A.; Lash, Timothy D. Journal: Tetrahedron letters Issue: Volume 61:Issue 48(2020) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗