“…Firstly, introduction of methyl or methoxy substituents at the 2,2′‐positions in 4 was examined to induce helical structures for the fused diphenylmethyl segment. Following our previous procedure, 2,18,20‐trichloro‐5,10,15‐tris(3,5‐di‐ tert ‐butylphenyl) Ni II porphyrin 6 was reacted with 2,2′‐substituted diphenylmethyllithiums to produce the adducts 7Me and 7OMe in 53 and 42 % yields, respectively (Scheme ). Conversion of these compounds into the corresponding helical radicals rac ‐8Me‐A and rac ‐8OMe‐A were attempted using two‐fold palladium‐catalyzed intramolecular C−H arylations and spontaneous hydrogen atom loss from the central carbon .…”