Patents by Inventor Hans Jacob Edgar Loewenthal

Hans Jacob Edgar Loewenthal 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).

  • Conversion of a hydroxy group in certain alcohols into a fluorosulfonate ester or a trifluoromethylsulfonate ester
    Patent number: 6395918
    Abstract: The present invention provides a method of converting a hydroxy group in alcohols containing an electron withdrawing group into perfluoroalkane sulfonate and fluorosulfonate esters, which are good leaving groups, with inversion of configuration where the hydroxyl-bearing carbon is chiral. The method consists of converting an alcohol to an O—N,N-dialkylsulfamate ester and reacting it with a perfluoroalkansulfonic or fluorosulfonic acid. The method has applications in the synthesis of pharmaceutical and agrochemical compounds.
    Type: Grant
    Filed: October 27, 2000
    Date of Patent: May 28, 2002
    Inventors: Hans Jacob Edgar Loewenthal, Ron Benjamin Loewenthal