Patents by Inventor Herwig Hoffman

Herwig Hoffman 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).

  • Patent number: 4987270
    Abstract: 3-Arylisobutanols of the general formula I ##STR1## where R.sup.1 and R.sup.2 are each hydrogen or an alkyl or cyclo-alkyl radical of not more than 8 carbon atoms, preferably alkyl of 1 to 4 carbon atoms, are prepared by a process in which an arylcarbinol of the general formula II ##STR2## is reacted with n-propanol in the presence of a catalytic amount of an alkali metal hydroxide or an alkali metal alcoholate at from 250.degree. to 350.degree. C. in a closed reaction vessel.The process is of particular importance for the preparation of 3-arylisobutanols of the formula I, where R.sup.1 is alkyl of 1 to 4 carbon atoms and R.sup.2 is hydrogen. The p-methyl-, p-isopropyl- and p-tert-butylphenylisobutanols obtained here in very good selectivity are useful intermediates for the desirable scents jasmorange, cyclamen aldehyde and Lysmeral.RTM. (Lilial.RTM.).
    Type: Grant
    Filed: August 23, 1989
    Date of Patent: January 22, 1991
    Assignee: BASF Aktiengesellschaft
    Inventors: Kaspar Bott, Herwig Hoffman, Walter Scheidmeir