Patents by Inventor Michael Barry Mitchell

Michael Barry Mitchell 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).

  • Processes and intermediates for the preparation of 2-substituted benzaldehydes
    Patent number: 5659084
    Abstract: Processes for preparing 2-substituted benzaldehydes of general formula (I), wherein: R.sub.1 is CH.sub.2 CH.sub.2 --(L.sub.1).sub.p --(CH.sub.2).sub.q --(L.sub.2).sub.r --CH.sub.2 --(T).sub.2 --Z; L.sub.1 and L.sub.2 are independently CH.sub.2 CH.sub.2, CH.dbd.CH or C.tbd.C; q is 0 to 8; p, r and s are independently 0 or 1; T is O, S, CH.sub.2, CH.dbd.CH, C.tbd.C; and Z is C.sub.1-4 alkyl, ethynyl, trifluoromethyl, isopropenyl, furanyl, thienyl, cyclohexyl or phenyl optionally mono substituted with CF.sub.3, C.sub.1-4 alkyl, C.sub.1-4 alkoxy, methylthio, or trifluoromethylthio; and R.sub.2 and A are independently H, CF.sub.3, C.sub.1-4 alkyl, F, Cl, Br or I; are useful for preparing pharmaceutically active compounds.
    Type: Grant
    Filed: December 7, 1994
    Date of Patent: August 19, 1997
    Assignees: SmithKline Beecham Corporation, SmithKline Beecham plc
    Inventors: Kerry Joseph Gombatz, Michael Anthony Forth, Jerome Francis Hayes, Michael Barry Mitchell, Stephen Alexander Smith