US Patent Issued to Intervet on April 22 for "Process for the production of ethyl 3-amino-1-[(3R,4S)-4-cyanotetrahydropyran-3-ylpyrazole-4-carboxylate through chiral separation of a racemic mixture" (German Inventors)

ALEXANDRIA, Va., June 6 -- United States Patent no. 12,281,104, issued on April 22, was assigned to Intervet Inc. (Rahway, N.J.).

"Process for the production of ethyl 3-amino-1-[(3R,4S)-4-cyanotetrahydropyran-3-ylpyrazole-4-carboxylate through chiral separation of a racemic mixture" was invented by Christophe Pierre Alain Chassaing (Schwabenheim, Germany) and Karl-Heinz Grimm (Schwabenheim, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A process for chiral separation of ethyl 3-amino-1-[(3R,4S)-4-cyanotetrahydropyran-3-yl]pyrazole-4-carboxylate (VI) from the racemic mixture of ethyl 3-amino-1-[(3R,4S)-4-cyanotetrahydropyran-3-yl]pyrazole-4-carboxylate and ethyl 3-amino-1-[(3S,4R)-4-cyanotetrahydropy...