Patents by Inventor Choung Un Kim
Choung Un 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).
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Patent number: 5837871Abstract: Provided are compounds of the following formulae:A phosphonomethoxymethyoxymethyl purine/pyrimidine derivative of the formula ##STR1## wherein X and X' are the same or different and are hydrogen or alkyl. R and R' are the same or different and are hydrogen, alkyl, hydroyalkyl or alkanoyl andB is a purine or pyrimidine base.Type: GrantFiled: June 7, 1995Date of Patent: November 17, 1998Assignees: Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, Rega Stichting, v.z.w.Inventors: Choung Un Kim, John C. Martin, Bing Uh Luh, Peter F. Misco
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Patent number: 5726174Abstract: Provided are compounds of the following formulae:A phosphonomethoxymethyoxymethyl purine/pyridimidine derivative of the formula ##STR1## wherein X and X' are the same or different and are hydrogen or alkyl. R and R' are the same or different and are hydrogen, alkyl, hydroxyalkyl or alkanoyl andB is a purine or pyrimidine base.A compound of formula (II) or (VIII) ##STR2## wherein the broken line is an optional bond; X, R and X' are the same or different and are H or alkyl with 1 to 6 carbon atoms;wherein in the compound of formula (II), Y and Z are the same or different and are H; OH; alkyl having 1 to 6 carbon atoms; alkyl having 1 to 6 carbon atoms which is substituted with halogen, hydroxy, amino or azido; or Y and Z are taken together to form an oxygen atom or a methylene group; or Y is taken together with X' to complete a cyclic phosphonate having the structure of formula (III) ##STR3## wherein R.sup.Type: GrantFiled: June 7, 1995Date of Patent: March 10, 1998Assignees: Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, Rega Stichting v.z.w.Inventors: Choung Un Kim, John C. Martin, Bing Uh Luh, Peter F. Misco
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Patent number: 5696265Abstract: Provided are compounds of the following formulae:A phosphonomethoxymethyoxymethyl purine/pyrimidine derivative of the formula ##STR1## wherein X and X' are the same or different and are hydrogen or alkyl. R and R' are the same or different and are hydrogen, alkyl, hydroxyalkyl or alkanoyl andB is a purine or pyrimidine base.A 4'-phosphonomethoxytetrahydrofuranyl-1'-purine-pyrimidine of the formula ##STR2## wherein X and X' are the same or different and are hydrogen or alkyl, Y and Z are the same or different and are hydrogen, hydroxyl or alkyl or Y+Z is an alkenyl, an epoxide or cyclopropyl, andB is a purine or pyrimidine base.Type: GrantFiled: June 7, 1995Date of Patent: December 9, 1997Assignees: Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, Rega Stichting v.z.w.Inventors: Choung Un Kim, John C. Martin, Bing Uh Luh, Peter F. Misco
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Patent number: 5693798Abstract: Provided are compounds of the following formulae:A phosphonomethoxymethyoxymethyl purine/pyrimidine derivative of the formula ##STR1## wherein X and X' are the same or different and are hydrogen or alkyl. R and R' are the same or different and are hydrogen, alkyl, hydroxyalkyl or alkanoyl andB is a purine or pyrimidine base.A 4'-phosphonomethoxytetrahydrofuranyl-1'-purine-pyrimidine of the formula ##STR2## wherein X and X' are the same or different and are hydrogen or alkyl, Y and Z are the same or different and are hydrogen, hydroxyl or alkyl or Y+Z is an alkenyl, an epoxide or cyclopropyl, andB is a purine or pyrimidine base.Type: GrantFiled: June 7, 1995Date of Patent: December 2, 1997Assignees: Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, Rega Stichting v.z.wInventors: Choung Un Kim, John C. Martin, Bing Uh Luh, Peter F. Misco
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Patent number: 5688778Abstract: Provided are compounds of the following formulae:A phosphonomethoxymethyoxymethyl purine/pyrimidine derivative of the formula ##STR1## wherein X and X' are the same or different and are hydrogen or alkyl. R and R' are the same or different and are hydrogen, alkyl, hydroxyalkyl or alkanoyl;B is a purine or pyrimidine base.optionally R is taken together with X' to complete a cyclic phosphonate having the formula ##STR2## A 4'-phosphonomethoxytetrahydrofuranyl-1'-purine-pyrimidine of the formula ##STR3## wherein X and X' are the same or different and are hydrogen or alkyl, the dashed line is an optional bond,Y and Z are the same or different and are hydrogen, hydroxyl or alkyl or Y+Z are taken together to form an epoxide or cyclopropyl, andB is a purine or pyrimidine base.Type: GrantFiled: February 17, 1995Date of Patent: November 18, 1997Assignees: Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, Rega Stichting v.z.w.Inventors: Choung Un Kim, John C. Martin, Bing Uh Luh, Peter F. Misco
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Patent number: 5686611Abstract: Provided are compounds of the following formulae: A phosphonomethoxymethyoxymethyl purine/pyrimidine derivative of the formula ##STR1## wherein X and X' are the same or different and are hydrogen or alkyl. R and R' are the same or different and are hydrogen, alkyl, hydroxyalkyl or alkanoyl andB is a purine or pyrimidine base.A compound of formula (VI) ##STR2## wherein X is halogen, Y is S-phenyl, Se-phenyl or halogen and B is hypoxanthine, xanthine, guanine, 8-bromoguanine, 8-chloroguanine, 8-methylguanine, 8-thioguanine, 3-deazaguanine, purine, 2-aminopurine, 2,6-diaminopurine, adenine, 3-deazaadenine, 8-aminoguanine, 8-hydrazinoguanine, 8-hydroxyguanine, cytosine, 5-ethylcytosine, 5-methylcytosine, thymine, uracil, 5-chlorouracil, 5-bromouracil, 5-ethyluracil, 5-iodouracil, 5-propyluracil or 5-vinyluracil, 2-acetamido-6-diphenylcarbamoylpurine, 6-N-dimethylamino-methyladenine or 6-N-pivaloyladenine.Type: GrantFiled: June 7, 1995Date of Patent: November 11, 1997Assignees: Institute of Organic Chemistry and Biochemistry of the Academy of Sciences of the Czech Republic, Rega Stichting v.z.w.Inventors: Choung Un Kim, John C. Martin, Bing Uh Luh, Peter F. Misco
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Patent number: 4710568Abstract: Disclosed are novel carbapenem derivatives characterized by a 2-substituent of the formula ##STR1## in which A represents cyclopentylene, cyclohexylene or C.sub.2 -C.sub.6 alkylene optionally substituted by one or more C.sub.1 -C.sub.4 alkyl groups and ##STR2## represents a quaternized nitrogen-containing aromatic heterocycle. Such derivatives are useful as potent antibacterial agents. Also disclosed are processes for the preparation of such derivatives and novel intermediates utilized in these processes.Type: GrantFiled: October 30, 1986Date of Patent: December 1, 1987Assignee: Bristol-Myers CompanyInventors: Choung Un. Kim, Peter F. Misco, Jr.
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Patent number: 4071513Abstract: Chemical transformation of the dihydrothiazine ring of a cephalosporin into the dihydrooxazine ring (1-oxacephem) was accomplished utilizing the novel intermediate having the structure ##STR1## wherein R is an amino-protecting group and R.sup.1 is the residue of an ester group which can be removed readily without disrupting the remainder of the molecule as illustrated by phenoxyacetyl as R and benzhydryl as R.sup.1.Type: GrantFiled: October 1, 1976Date of Patent: January 31, 1978Assignee: Bristol-Myers CompanyInventor: Choung Un Kim