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A practical and scalable protocol for visible‐light‐accelerated arylation and alkylation of quinoxalin‐2(1H)‐ones with hydrazines is reported. In this protocol, a hydrazone‐based two‐dimensional covalent organic frameworks (2D‐COF‐1) was employed as the heterogeneous photocatalyst (PC). Due to its excellent photocatalytic properties, good chemical stability and heterogeneous nature, the present method exhibits high efficiency, good functional group tolerance, easy scalability and remarkable catalyst reusability. More importantly, it provides an alternative way that allows rapid access to various C3 arylated or alkylated quinoxalin‐2(1H)‐ones in a greener and sustainable manner. [ABSTRACT FROM AUTHOR]

Keywords: alkylation; arylation; covalent organic frameworks; quinoxalin-2(1H)-ones; visible-light-driven This protocol features high efficiency, good functional group tolerance, easy scalability and remarkable catalyst reusability. This protocol features high efficiency, good functional group tolerance, easy scalability and remarkable catalyst reusability. [Extracted from the article]