Abstract
The preparation is reported
of a number of 1,19-dimethyl-1,19-dideoxybilenes-b and 1,19-dimethyl-1,19-dideoxybiladienes-ac
which carry electronegative substituents. These linear tetrapyrroles can be
cyclized to porphyrins in good yield by means of copper acetate in pyridine
solution.
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