Patents by Inventor Claudio Calzolari

Claudio Calzolari 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).

  • Process for the debromination of 2-substituted-5-bromo-6-methoxynaphthalenes
    Patent number: 5107013
    Abstract: Naphthalenes of formula ##STR1## wherein X represents COCH.sub.3, COC.sub.2 H.sub.5, CH(CH.sub.3)COOH, CH(CH.sub.3)COOR, CH(CH.sub.3)CN and CH(CH.sub.3)CONHR.sub.1, R represents alkyl and R.sub.1 represents hydrogen, alkyl or hydroxyalkyl, are debrominated by means of acceptors of bromine, like alkylarenes and alkoxyarenes, in the presence of Lewis acids.
    Type: Grant
    Filed: December 27, 1990
    Date of Patent: April 21, 1992
    Assignee: Alfa Wassermann S.p.A.
    Inventors: Vincenzo Cannata, Claudio Calzolari, Giancarlo Tamerlani
  • Process for the synthesis of optically active aminoacids
    Patent number: 5041637
    Abstract: New process for the synthesis of optically active aminoacids of formula ##STR1## by treating compounds of formula ##STR2## which an optically active alcohol of formulaR.sub.4 --OH (III)d or 1To obtain a pair of diastereoiosmer esters of formula ##STR3## which is resolved in basic medium into the single diastereoisomer esters of formula ##STR4## from which the desired optically active aminoacid of formula (I) is obtained by treatment in acid medium.
    Type: Grant
    Filed: July 3, 1989
    Date of Patent: August 20, 1991
    Assignee: Presidenza del Consiglio del Ministri-Ufficio del Ministro per il Coordinamento delle Iniziatjvo per la Ricerca Scientifica E. Technologica
    Inventors: Vincenzo Cannata, Giancarlo Tamerlani, Claudio Calzolari