20π Antiaromatic Isophlorins without Metallation or Core Modification**,European Journal of Organic Chemistry

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20π Antiaromatic Isophlorins without Metallation or Core Modification**
European Journal of Organic Chemistry ( IF 2.5 ) Pub Date : 2022-08-03 , DOI: 10.1002/ejoc.202200747
Haruna Sugimura ₁ , Kana Nakajima ₁ , Ken-ichi Yamashita ₂ , Takuji Ogawa ₁

Affiliation

For the first time, the synthesis of free-base (metal-free) isophlorins with 20π antiaromatic character was achieved without core modification. The reduction of β-tetracyanoporphyrins by hydrazine under aerobic conditions yielded isophlorins. These 18π aromatic porphyrin/20π antiaromatic isophlorin redox interconversions are reversible.

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