This paper describes a simple and practical protocol for the direct synthesis of a series of new hybrid molecules of carbamyl β‐lactam derivatives bearing quinone moiety via [2 + 2] cycloaddition of Staudinger reaction. The β‐lactam ring is tolerating carbamylation and further leads to a variety of quinone hybrid derivatives. The structures of the compounds were characterized by IR, MS, nuclear magnetic resonance, and high‐resolution mass spectra analysis. All the new synthesized compounds were screened for their in vitro antiproliferative activity using an MTT assay analysis. Out of 14 derivatives synthesized in the current study, compounds 9h, 9k, 9i, and 9b exhibited the very good anticancer activities in B16F10 cell line.