The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 06, 2026
Filed:
Jan. 31, 2022
Endura S.p.a., Bologna, IT;
Carlo Lucarelli, Bologna, IT;
Tommaso Tabanelli, Cotignola, IT;
Angelo Vaccari, Bologna, IT;
Martina Eberle, Piovene Rocchette, IT;
Carla Marchioro, Villafranca di Verona, IT;
Matteo Campanati, Bologna, IT;
Stefano Billi, Faenza, IT;
Alberto Guerrini, Ravenna, IT;
Nicola Schiaroli, Senigallia, IT;
Endura S.P.A., Bologna, IT;
Abstract
The invention relates to a process for the preparation of 1-(1,3-benzodioxol-5-yl)-1-propanone comprising the step of reacting 3,4-methylendioxybenzene with propionic anhydride in the presence of a bulk or supported catalyst, being said catalyst selected from the group of a sulphonated cross-linked divinylbenzene resin, a sulphonated cross-linked divinylbenzene resin partially exchanged with iron, zinc or gallium, a perfluorinated sulphonic resin, and a perfluorinated sulphonic resin partially exchanged with iron, zinc or gallium, wherein said catalyst has an average particle size from 1 μm to 300 μm, preferably from 1 μm to 180 μm, more preferably from 1 μm to 100 μm as measured with DLS (Dynamic light scattering) or a granulometer. The process is advantageously carried out at stoichiometric ratio between the reagents and with a continuous process.