US Patent Issued to Bayer on July 22 for "Process for producing acyloxymethyl esters of (4S)-(4-cyano-2-methoxyphenyl)-5-ethoxy-2,8-dimethyl-1,4-dihydro-1,6-naphthyridin-3-carboxylic acid" (German Inventors)

ALEXANDRIA, Va., July 23 -- United States Patent no. 12,365,679, issued on July 22, was assigned to Bayer AG (Leverkusen, Germany).

"Process for producing acyloxymethyl esters of (4S)-(4-cyano-2-methoxyphenyl)-5-ethoxy-2,8-dimethyl-1,4-dihydro-1,6-naphthyridin-3-carboxylic acid" was invented by Johannes Platzek (Berlin), Kai Lovis (Dusseldorf, Germany), Alba Hernandez Martin (Dusseldorf, Germany) and Silja Brady (Leverkusen, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a process for preparing acyloxymethyl esters of (4S)-(4-cyano-2-methoxyphenyl)-5-ethoxy-2,8-dimethyl-1,4-dihydro-1,6-naphthyridine-3-carboxylic acid of the formula (IIa) by optical resolution of the c...