Patents by Inventor Mohammed Aslam

Mohammed Aslam 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).

  • Method for producing chlorobenzoxazolene
    Patent number: 6274739
    Abstract: The invention relates to a process for preparing chlorobenzoxazoles of the formula (I), in which R1, R2 and R4 are as defined in claim 1 and in case (a) R3=H, halogen, CN, NO2, C1-C5-alkyl, C1-C5-alkoxy, aryl or aryloxy, where each of the 4 lastmentioned radicals is unsubstituted or substituted, or in case (b) R3=chlorine, which comprises reacting benzoxazoles of the formula (II), in which R1, R2 and R4 are as defined in formula (I) and R3 in case (a) is as defined in formula (I) and R3 in case (b) is hydrogen, in the presence of an acidic catalyst with a chlorinating agent to give the monochlorination product (I) or in case (b) with an excess of the chlorinating agent to give the dichlorination product (I) in which R3=chlorine.
    Type: Grant
    Filed: June 14, 2000
    Date of Patent: August 14, 2001
    Assignee: Aventis CropScience GmbH
    Inventors: Hans-Joachim Ressel, Mohammed Aslam, Jean Pierre Demoute, Günter Schlegel, Wolfgang Welter