Patents by Inventor De Peyer

De Peyer 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).

  • Synthesis of chroman derivatives
    Patent number: 5112972
    Abstract: The invention relates to new chroman derivatives of the formula I ##STR1## in which R.sup.1 is A,R.sup.2 and R.sup.8 are each H or A,R.sup.1 and R.sup.2 together are also alkylene with 3-6 C atoms,R.sup.3 is OH, OA or OAc,R.sup.4 is H,R.sup.3 and R.sup.4 together are also a bond,R.sup.5 is Ar or C.sub.n H.sub.2n -R.sup.9,R.sup.9 is alkenyl or alkynyl with 2-4 C atoms in each case, OH, OA, CHO, CO-A, CS-A, COOH, COOA, COO-alkyl-Ar, CS-OA, NO.sub.2, NH.sub.2, NHA, NA.sub.2, CN, F, Cl, Br, I, CF.sub.3, SA, SO-A, SO.sub.2 -A or Ar,Ar is a phenyl group which is unsubstituted or substituted once or twice by R.sup.10, R.sup.6, R.sup.7 and R.sup.10 are each H, A, HO, AO, CHO, ACO, CF.sub.3 CO, ACS, HOOC, AOOC, AO-CS, ACOO, A-CS-O, hydroxy-alkyl, mercapto-alkyl, NO.sub.2, NH.sub.2, NHA, NA.sub.2, CN, F, Cl, Br, I, CF.sub.3, AS, ASO, ASO.sub.2, AO-SO, AO-SO.sub.2, AcNH, AO-CO-NH, H.sub.2 NSO, HANSO, A.sub.2 NSO, H.sub.2 NSO.sub.2, HANSO.sub.2, A.sub.2 NSO.sub.2, H.sub.2 NCO, HANCO, A.sub.2 NCO, H.sub.2 NCS, HANCS, A.
    Type: Grant
    Filed: May 31, 1990
    Date of Patent: May 12, 1992
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Rolf Gericke, Manfred Baumgarth, Ingeborg Lues, Rolf Bergmann, De Peyer