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Chem. Commun., 2003, 858 - 859, DOI: 10.1039/b212923j

Accelerated Bergman cyclization of porphyrinic-enediynes

Mahendra Nath, John C. Huffman and Jeffrey M. Zaleski

The Bergman cyclization of simple diethynylporphyrinic-enediynes exhibits a double activation barrier to the formation of Bergman cyclized product. Addition of H-atom acceptor accelerates the formation of the picenoporphyrin, indicating that the second barrier is rate limiting.

Graphical abstract image for this article (ID: b212923j)