Patents by Inventor José Diago

José Diago has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • N,N'-carbonyl-bis-(4-ethyl-2,3-dioxo)-piperazine
    Patent number: 4965358
    Abstract: A new compound called N,N'-carbonyl-bis-(4-ethyl-2,3-dioxo)-piperazine of Formula I ##STR1## A process for the preparation thereof based on the reaction of 4-ethyl-2,3-dioxo-piperazine or a trimethylsilyl derivative thereof with carbonyl chloride or a derivative thereof.The use of the compound of Formula I as an intermediate in the preparation of compounds of Formula II ##STR2## where R is a radical, substituted in alpha position, of a molecule of an acid selected from the group formed by phenylacetic acid, p-hydroxy phenylacetic acid, a 6-(phenylacetamido)-penicillanic acid and a 7-(phenylacetamido)-cephalosporanic acid.
    Type: Grant
    Filed: November 10, 1988
    Date of Patent: October 23, 1990
    Assignee: Gema, S. A.
    Inventors: Juan Cabre Castellvi, Jose Diago Meseguer, Asuncion Esteve Bianchini, Carlos E. Lenhardt Padro, Esteve Sans Pitarch
  • Process for the activation of carboxylic acids
    Patent number: 4230849
    Abstract: A process for the activation of carboxylic acids which is useful for the subsequent conversion of said carboxylic acids into their corresponding amides or esters, based on reacting a 2-oxazolidinone with phosphorus pentachloride and subsequent addition of a salt of the carboxylic acid to be activated.
    Type: Grant
    Filed: July 2, 1979
    Date of Patent: October 28, 1980
    Assignee: Antibioticos, S.A.
    Inventors: Antonio L. Palomo Coll, Jose Diago Meseguer