Patents by Inventor Toshiharu Nakatsuji

Toshiharu Nakatsuji 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).

  • Tri-organotin silatrane derivatives and pesticidal compositions, fungicides or antifouling agents comprising said compounds as active ingredients
    Patent number: 4654368
    Abstract: A tri-organotin silatrane derivative represented by the general formula (I) ##STR1## wherein the R.sup.1 groups are identical or different and each represents an alkyl, cycloalkyl, aryl or aralkyl group, R.sup.2, R.sup.3 and R.sup.4 are identical or different and each represents a hydrogen atom or a lower alkyl group, and m is a number of 2 or 3.The tri-organotin silatrane derivatives of the formula (I) are prepared by subjecting a 1-mercaptoalkylsilatrane and a tri-organotin hydroxide or bis(tri-organotin) oxide to a dehydration reaction, or reacting a 1-mercaptoalkylsilatrane derivative with a tri-organotin halide in the presence of a dehydrohalogenation agent, or subjecting a trialkoxysilane and a trialkanolamine to an ester-interchange reaction in the presence of an alkaline catalyst.The tri-organotin silatrane derivatives of the formula (I) are useful for an agricultural-horticultural pesticide, an industrial fungicide, an epidemic-preventing insecticide or an antifouling agent.
    Type: Grant
    Filed: July 16, 1985
    Date of Patent: March 31, 1987
    Assignee: Nitto Kasei Co., Ltd.
    Inventors: Kazuhiko Sakamoto, Toshiharu Nakatsuji, Hideo Mototani, Katsuzo Kamoshita, Isamu Nakayama, Toshiro Kato