Vladimír Král, Philip A. Gale, Pavel Anzenbacher Jr., Karolina Jursíková, Vincent Lynch, Jonathan L. Sessler, Vladimír Král and Pavel Anzenbacher Jr.
Reaction of dichlorocarbene with meso-octamethylcalix[4]pyrrole causes pyrrole ring expansion, producing chlorocalixpyridinopyrroles and chlorocalixpyridines.