A Journal of Accepted Article Supported by Title: Palladium‐Catalyzed Direct ortho-C-H Bond Sulfonylation and Halogenation of Phthalazine-1,4-diones Authors: Minoo Dabiri, Noushin Farajinia Lehi, Chiman Osmani, and Siyavash Kazemi Movahed This manuscript has been accepted after peer review and appears as an Accepted Article online prior to editing, proofing, and formal publication of the final Version of Record (VoR). This work is currently citable by using the Digital Object Identifier (DOI) given below. The VoR will be published online in Early View as soon as possible and may be different to this Accepted Article as a result of editing. Readers should obtain the VoR from the journal website shown below when it is published to ensure accuracy of information. The authors are responsible for the content of this Accepted Article. To be cited as: Eur. J. Org. Chem. 10.1002/ejoc.201901055 Link to VoR: http://dx.doi.org/10.1002/ejoc.201901055