
Chemical Communications p. 858 - 859 (2003)
Update date:2022-08-03
Topics:
Nath, Mahendra
Huffman, John C.
Zaleski, Jeffrey M.
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.
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