Photochemical and oxidative cyclisation of tetraphenylpyrroles

Org Biomol Chem. 2017 Nov 15;15(44):9293-9296. doi: 10.1039/c7ob02537h.

Abstract

The photochemical and oxidative cyclodehydrogenation reactions of tetraphenylpyrroles act in a complementary fashion for the cyclisation of N-ethyl and N-benzyl derivatives. In the case of the former, a doubly cyclised product was isolated from cyclisation with solid FeCl3, while the latter gives a rearranged 3H-pyrrole upon irradiation.