Huang PF, Fu JL, Peng Y, Tang KW, Liu Y. Electrochemical Oxidative (4 + 2) Cyclization of Anilines and
o-Phenylenediamines for the Synthesis of Phenazines.
Org Lett 2024;
26:3756-3761. [PMID:
38678581 DOI:
10.1021/acs.orglett.4c00851]
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Abstract
Phenazines, crucial constituents of nitrogen-containing heterocycles, widely exist in functional compounds. Herein, we report an anodic oxidative (4 + 2) cyclization between anilines and o-phenylenediamines for the uniform construction of phenazines in a simple undivided cell. Dual C-H amination followed by oxidation represents an outstanding step and atom efficiency. A sequence of phenazines is produced with excellent functional group tolerance at room temperature.
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