Patents by Inventor Lutz Tietze

Lutz Tietze 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).

  • Preparation of .alpha.,.beta.-unsaturated .beta.-oxycarboxylic acid chlorides
    Patent number: 5543568
    Abstract: A process for the preparation of .alpha.,.beta.-unsaturated .beta.-oxycarboxylic acid chlorides of the formula I ##STR1## where R.sup.1 is a C-organic radical, and R.sup.2 and R.sup.3, independently of one another, are hydrogen or a C-organic radical, comprises carrying out the addition reaction of an enol derivative of the formula II ##STR2## with a compound of the formula IIIa, IIIb or IIIc ##STR3## and converting the resultant acid chloride of the formula ##STR4## into I by elimination of hydrogen chloride (HCl).
    Type: Grant
    Filed: September 7, 1993
    Date of Patent: August 6, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Jochem Henkelmann, Lutz Tietze