Correction: An ionic liquid medium enables development of a phosphine-mediated amine-azide bioconjugation method (Journal of the American Chemical Society (2021) 143:33 (12974-12979) DOI: 10.1021/jacs.1c06092)

Further study of the phosphine-mediated reactions on biomolecules revealed that the structure of the reaction product is a urea group but not a tetrazene group. One of the key peaks (300 ppm, which was assigned as one of the nitrogen atoms of NN in the tetrazene group) in the 15N NMR analysis of the product in the published report turned out to be an artifact signal from the solvent as this peak could not be observed reproducibly from the same 15N-enriched sample.1 In addition, the urea product and tetrazene compound have almost identical masses, which also contributed to the wrong identification of theproduct structure. (Figure presented). © 2022 American Chemical Society.