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1. Cobalt‐Catalyzed Annulation of o‐Phenylenediamines and Internal Alkynes: Efficient Synthesis of Quinoxaline Derivatives.

Author

Zhao, Rui, Wu, Ling, Chen, Si‐Wei, Cui, Zhen, Hu, Xu‐Hua, Yang, Hui‐Ru, Ye, Hongfei, Miao, Chun‐Bao, and Guo, Xun‐Xiang

Subjects
*QUINOXALINES, *ALKYNES, *ANNULATION, *OXIDIZING agents, *OXIDATION, *COBALT
Abstract

A cobalt‐catalyzed annulation of o‐phenylenediamines and internal alkynes for the synthesis of quinoxalines is developed. This method provides a variety of quinoxalines in good to high yields under a simple and mild reaction conditions with molecular O2 as a terminal oxidant. Preliminary mechanistic studies show that a novel reaction mechanism is involved in the current reaction, which is different from the previous reported dicarbonyl compound mechanism via the oxidation of the alkyne. [ABSTRACT FROM AUTHOR]

Published
2024
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