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Formation of nickel tetradehydrocorrins and porphins from linear tetrapyrroles of varied oxidation level
Chemical Communications (London)
WE have shown that the ,8-octa-alkyl substituted linear tetrapyrrolic derivatives of I-bromo-I,19dideoxy-19-methylbiladiene-ac dihydrobromides (I; X = Br) can be cyclised to porphins when thev are heated in o-dichlorobenzene 1 ,2 or even. in certain cases, kept in dimethyl sulphoxide and pyridine a t room temperature. 2 The same 1,19dideoxybiladiene-ac salts (I; X = Br) can also be cyclised to I-methyltetradehydrocorrin nickel complexes (II) when they are trea ted ,vith a base in presence of nickel ions in the absence of air.3doi:10.1039/c19670000560 fatcat:4jaykmr7knculbytopgij5hjli