Procos S.p.a.

Piergiorgio Bettoni

Jacopo Roletto

Paolo Paissoni

Martino Veronese

Tommaso Angelini

Disclosed is a process for the synthesis of efinaconazole (I), starting from 1-[[(2R,3S)-2-(2,4-difluorophenyl)-3-methyloxiranyl]methyl]-1H-1,2,4-triazole and 4-methylenepiperidine, as free base or hydrochloride, in an organic solvent, under anhydrous conditions and in the presence of neutralising agents and reaction-promoting metal species. (1) The process is particularly advantageous because it gives rise to efinaconazole in high yields and purity, and uses little more than the stoichiometric amount of 4-methylenepiperidine, a rather expensive commercially available reagent. 

Process for the synthesis of efinaconazol

Disclosed is a process for the industrial synthesis of Lurasidone from (1R,2R)-cyclohexane-1,2-diyldimethanol (1), 3-(piperazin-1-yl)benzo[d]isothiazole (3) and (3aR,4R,7R,7aS)-3a,4,7,7a-tetrahydro-4,7-methanoisobenzofuran-1,3-dione (6).). Said process is optimised to obtain Lurasidone with high yields and high purities by preparing highly pure synthesis intermediates, using critical raw materials and reagents in amounts close to the stoichiometric amounts, increasing productivity and reducing the costs and environmental impact of the process. 

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Casale Monferrato, Italy

Piergiorgio Bettoni