Patents by Inventor Hiroshi Shimojitosho

Hiroshi Shimojitosho 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).

  • Process for preparation of tertiary alcohol esters
    Patent number: 6872846
    Abstract: The production process of the present invention comprises a step of allowing a carboxylic acid derivative represented by the formula (1): wherein ring Z is a monocyclic or polycyclic non-aromatic or aromatic ring, and R1 is a halogen atom or a group represented by the formula (2): —OR??(2) wherein R is a hydrogen atom or a hydrocarbon group, to react with an organometallic compound represented by the formula (3): R2-M??(3) wherein R2 is a hydrocarbon group, and M is a metallic atom which may have a ligand, or the formula (4): -MgY??(4) wherein Y is a halogen atom, and a carboxylic acid halide represented by the formula (5): wherein R3 is a hydrocarbon group or a heterocyclic group, and X is a halogen atom, to yield the tertiary alcohol ester represented by the formula (6): wherein Z, R2 and R3 have the same meanings as defined above.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: March 29, 2005
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Shinya Nagano, Hiroshi Shimojitosho