Patents by Inventor Roberto D. Droghini

Roberto D. Droghini 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).

  • .beta.-Lactam antibiotic esterification process using methoxymethyl methane sulfonate
    Patent number: 4217275
    Abstract: Disclosed is an improved process for esterifying carboxylic acids, particularly 3-carboxylic acid groups of penicillins and 4-carboxylic acid groups of cephalosporins, to form methoxymethyl esters. Replacement according to the present process of the conventional halomethyl methyl ether esterifying agent with methoxymethyl mesylate avoids the carcinogenicity problem of the prior art reagent while still giving good yields of high quality product.
    Type: Grant
    Filed: February 28, 1979
    Date of Patent: August 12, 1980
    Assignee: Bristol-Myers Company
    Inventors: Gary M. F. Lim, Roberto D. Droghini