A rationale modification of m-benziporphyrin by inner carbon methylation is crucial for the effective conversion of
meta-phenylene to cyclopentadiene, a highly efficient
contraction. The remarkable and facile gold(III)-mediated transformation of 22-methyl-meta-benziporphyrin to gold(III) 2-methyl-2
1-carbaporphyrins is reported. More information can be found in the Full Paper by L. Latos-Grażyński et al. on
10.1002/chem.201604458" rel="references:https://doi.org/10.1002/chem.201604458">page 2059 ff.