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. 2025 Oct 3;27(39):10948-10953.
doi: 10.1021/acs.orglett.5c03111. Epub 2025 Sep 19.

Two Cationic Antiaromatic Free-Base Corroles

Pengfei Li  1 , Fan Wu  2 , Chulin Qu  1 , Hidemitsu Uno  3 , Zhen Shen  1
Affiliations

Two Cationic Antiaromatic Free-Base Corroles

Pengfei Li et al. Org Lett. .

Abstract

The synthesis of free-base antiaromatic porphyrinoids remains a challenging task. Herein we report the first preparation of two cationic free-base antiaromatic corroles, BC(H2)+ (containing two NH moieties, slightly saddle-shaped) and BC(H4)3+ (containing four NH moieties, severely distorted saddle-shaped), utilizing a strategy of β-annulated benzene rings to suppress side reactions. The antiaromatic character of BC(H2)+ and BC(H4)3+ is robustly supported by crystallographic analysis, spectroscopic evidence, and theoretical calculations.

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