beta-Pyrazino-fused tetrarylporphyrins

A novel method for the preparation of beta-fused porphyrin dyads was developed that exploits a one-pot reaction of 2,3-diaminoporphyrins with diethyl oxalate. This approach provides good yields of the zinc beta-fused dyad and the corresponding free-base, opening the way for preparation of several metal derivatives to permit modulation of optoelectronic characteristics for commercial applications. (C) 2013 Elsevier Ltd. All rights reserved.