Patent ID: 9018401
Filing Date: 2015-04-28
Classification: C07D

Abstract:
1. A process for obtaining (ethyne-1,2-diyl)bis(isobenzofuran-1,3-dione) comprising the steps of: reacting a chloro-, bromo-, or iodoisobenzofuran-1,3-dione with ethyne in an aprotic solvent, and in the presence of a dissolved, homogenous palladium catalyst, a base, and optionally a solvent distinct from the base, to obtain precipitated (ethyne-1,2-diyl)bis(isobenzofuran-1,3-dione); and separating the obtained precipitated (ethyne-1,2-diyl)bis(isobenzofuran-1,3-dione) from the reaction mixture.