Patents by Inventor Keon Il Kim

Keon Il Kim 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).

  • Preparation of N-substituted-hydroxycycloalkylamine derivatives
    Patent number: 6566525
    Abstract: A process for the preparation of N-substituted-hydroxycycloalkylamine derivatives, that are useful intermediates for the synthesis of various organic chemicals including pharmaceutical and agrochemical compounds, represented by formula (1), by reacting a 1,2-dihydroxalkyl alcohol, represented by the following formula (2), with a thionyl halide to produce an intermediate 1,2-cyclosulfinylalkyl halide represented by the following formula (3); and then cyclizing that intermediate with an amine compounds represented by the following formula (4). In the above structural formuli, * represents an asymmetric carbon atom; R1 is hydrogen or an amino-protecting group; m is an integer of 1-3; and X is halogen.
    Type: Grant
    Filed: April 7, 2001
    Date of Patent: May 20, 2003
    Assignee: Samsung Fine Chemicals Co., Ltd.
    Inventors: Seong Jin Kim, Keon Il Kim, Kyoung Youl Yang