Novel one-pot synthesis of 5-alkenyl-15-alkynylporphyrins and their derivatisation to a butadiyne-linked benzoporphyrin dimer.
5-Alkenyl-15-alkynylporphyrins have been obtained unexpectedly by [2 + 2] acid-catalyzed condensation of dipyrrylmethane and TMS propynal in addition to 5,15-dialkynylporphyrin, and the unsymmetrical porphyrin can be converted to a butadiyne-linked dimer by selective desilylation of the alkynyl TMS.
Department of Chemstry, Faculty of Science, Ehime University, Matsuyama 790-8577, Japan. yamada@chem.sci.ehime-u.ac.jp
Hiroko
H
Yamada
Kayo
K
Kushibe
Tetsuo
T
Okujuma
Hidemitsu
H
Uno
Noboru
N
Ono