Patents by Inventor William Leong

William Leong 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).

  • Publication number: 20260217643
    Abstract: The present disclosure relates to a process for making a compound of the formula I and to the enantioselective synthesis to prepare the S or R isomers. It also relates to intermediates in the process.
    Type: Application
    Filed: December 28, 2023
    Publication date: July 30, 2026
    Inventors: Chris Hugh SENANAYAKE, Gopal SIRASANI, Bo QU, Lalith Palitha SAMANKUMARA, Santosh Reddy NAINI, Praveen Kumar GAJULA, Satya Aravind GANGU, William LEONG
  • Publication number: 20250257031
    Abstract: The present invention refers to a process for preparing a compound of formula (I) or a pharmaceutically acceptable salt thereof: wherein R is (C3-C10)alkyl, or ?-trifluoro(C3-C10)alkyl; R1 and R2 are, independently, hydrogen, hydroxy, (C1-C8)alkoxy, (C1-C8) alkylthio, halo, trifluoromethyl or 2,2,2-trifluoroethyl; or one of R1 and R2 is in ortho position to the R—O— group and, taken together with the same R—O—, represents a group where R0 is (C2-C9)alkyl; R3 and R4 are, independently, hydrogen, (C1-C4)alkyl; or R4 is hydrogen and R5 is a group selected from —CH2—OH, —CH2—O—(C1-C6)alkyl, —CH(CH3)—OH, —(CH2)2—S—CH3, benzyl and 4-hydroxybenzyl; or R4 and R5, taken together with the adjacent carbon atom, form a (C3-C6)cycloalkyl residue; R5 and R6 are independently hydrogen or (C1-C6)alkyl; or taken together with the adjacent nitrogen atom form a 5-6 membered monocyclic saturated heterocycle, optionally containing one additional heteroatom chosen among —O—, —S— and —NR7— where R7 is hydrogen or (
    Type: Application
    Filed: April 29, 2025
    Publication date: August 14, 2025
    Applicant: Newron Pharmaceuticals S.p.A.
    Inventors: William Leong, Dongxiao Lan, Weifang Zhang, Xiang Fang, Sizhong Wu
  • Patent number: 12291495
    Abstract: The present invention refers to a process for preparing a compound of formula (I) or a pharmaceutically acceptable salt thereof: wherein R is (C3-C10)alkyl, or ?-trifluoro(C3-C10)alkyl; R1 and R2 are, independently, hydrogen, hydroxy, (C1-C8) alkoxy, (C1-C8) alkylthio, halo, trifluoromethyl or 2,2,2-trifluoroethyl; or one of R1 and R2 is in ortho position to the R—O— group and, taken together with the same R—O—, represents a Formula (A) group where R0 is (C2-C9)alkyl; R3 and R4 are, independently, hydrogen, (C1-C4)alkyl; or R4 is hydrogen and R5 is a group selected from —CH2—OH, —CH2—O—(C1-C6)alkyl, —CH(CH3)—OH, —(CH2)2—S—CH3, benzyl and 4-hydroxybenzyl; or R4 and R5, taken together with the adjacent carbon atom, form a (C3-C6)cycloalkyl residue; R5 and R6 are independently hydrogen or (C1-C6)alkyl; or taken together with the adjacent nitrogen atom form a 5-6 membered monocyclic saturated heterocycle, optionally containing one additional heteroatom chosen among —O—, —S— and —NR7— where R7 is hydrogen or (C1-C
    Type: Grant
    Filed: April 14, 2020
    Date of Patent: May 6, 2025
    Assignee: Newron Pharmaceuticals S.p.A.
    Inventors: William Leong, Dongxiao Lan, Weifang Zhang, Xiang Fang, Sizhong Wu
  • Publication number: 20250115552
    Abstract: The present disclosure relates to a crystalline salt selected from crystalline N-ethyl-2-(5-fluoro-1H-indol-3-yl)-N-methylethan-1-amine fumarate and crystalline N-ethyl-2-(5-fluoro-1H-indol-3-yl)-N-methylethan-1-amine hydrochloride, methods of preparing them, and uses thereof for treating mood disorders. In addition, the present disclosure relates to polymorphs of the aforementioned salts. Further, the present disclosure relates to an oil or amorphous form of N-ethyl-2-(5-fluoro-1H-indol-3-yl)-N-methylethan-1-amine, methods of preparing the same, and uses thereof for treating mood disorders.
    Type: Application
    Filed: October 29, 2024
    Publication date: April 10, 2025
    Applicant: Gilgamesh Pharmaceuticals, Inc.
    Inventors: Andrew Carry Kruegel, William Leong, Yameng He, Lauren MacEachern
  • Publication number: 20250084105
    Abstract: The present invention provides compounds, compositions thereof, and processes for preparing same.
    Type: Application
    Filed: November 21, 2024
    Publication date: March 13, 2025
    Inventors: William Leong, Dharyl Charles Wilson
  • Publication number: 20250042851
    Abstract: The present disclosure relates to a crystalline N-ethyl-2-(5-fluoro-1H-indol-3-yl)-N-methylethan-1-amine salt selected from crystalline N-ethyl-2-(5-fluoro-1H-indol-3-yl)-N-methylethan-1-amine monophosphate, crystalline N-ethyl-2-(5-fluoro-1H-indol-3-yl)-N-methylethan-1-amine mono-p-tosylate, crystalline N-ethyl-2-(5-fluoro-1H-indol-3-yl)-N-methylethan-1-amine hemimalate, and crystalline N-ethyl-2-(5-fluoro-1H-indol-3-yl)-N-methylethan-1-amine monosuccinate, pharmaceutical compositions comprising same, and uses thereof for treating mood disorders.
    Type: Application
    Filed: October 17, 2024
    Publication date: February 6, 2025
    Applicant: Gilgamesh Pharmaceuticals, Inc.
    Inventors: Andrew Carry Kruegel, William Leong, Yameng He, Lauren MacEachern
  • Patent number: 12187744
    Abstract: The present invention provides compounds, compositions thereof, and processes for preparing same.
    Type: Grant
    Filed: October 28, 2022
    Date of Patent: January 7, 2025
    Assignee: Kymera Therapeutics, Inc.
    Inventors: William Leong, Dharyl Charles Wilson
  • Patent number: 12180158
    Abstract: The present disclosure relates to a crystalline salt selected from crystalline N-ethyl-2-(5-fluoro-1H-indol-3-yl)-N-methylethan-1-amine fumarate and crystalline N-ethyl-2-(5-fluoro-1H-indol-3-yl)-N-methylethan-1-amine hydrochloride, methods of preparing them, and uses thereof for treating mood disorders. In addition, the present disclosure relates to polymorphs of the aforementioned salts. Further, the present disclosure relates to an oil or amorphous form of N-ethyl-2-(5-fluoro-1H-indol-3-yl)-N-methylethan-1-amine, methods of preparing the same, and uses thereof for treating mood disorders.
    Type: Grant
    Filed: September 14, 2023
    Date of Patent: December 31, 2024
    Assignee: Gilgamesh Pharmaceuticals, Inc.
    Inventors: Andrew Carry Kruegel, William Leong, Yameng He, Lauren MacEachern
  • Publication number: 20240400509
    Abstract: The present disclosure relates to a crystalline salt selected from crystalline N-ethyl-2-(5-fluoro-1H-indol-3-yl)-N-methylethan-1-amine fumarate and crystalline N-ethyl-2-(5-fluoro-1H-indol-3-yl)-N-methylethan-1-amine hydrochloride, methods of preparing them, and uses thereof for treating mood disorders. In addition, the present disclosure relates to polymorphs of the aforementioned salts.
    Type: Application
    Filed: September 14, 2023
    Publication date: December 5, 2024
    Applicant: Gilgamesh Pharmaceuticals, Inc.
    Inventors: Andrew Carry Kruegel, William Leong, Yameng He, Lauren MacEachern
  • Patent number: 12157722
    Abstract: The present disclosure relates to a crystalline salt selected from crystalline N-ethyl-2-(5-fluoro-1H-indol-3-yl)-N-methylethan-1-amine fumarate and crystalline N-ethyl-2-(5-fluoro-1H-indol-3-yl)-N-methylethan-1-amine hydrochloride, methods of preparing them, and uses thereof for treating mood disorders. In addition, the present disclosure relates to polymorphs of the aforementioned salts.
    Type: Grant
    Filed: September 14, 2023
    Date of Patent: December 3, 2024
    Assignee: Gilgamesh Pharmaceuticals, Inc.
    Inventors: Andrew Carry Kruegel, William Leong, Yameng He, Lauren MacEachern
  • Patent number: 12129234
    Abstract: The present disclosure relates to a crystalline N-ethyl-2-(5-fluoro-1H-indol-3-yl)-N-methylethan-1-amine salt selected from crystalline N-ethyl-2-(5-fluoro-1H-indol-3-yl)-N-methylethan-1-amine monophosphate, crystalline N-ethyl-2-(5-fluoro-1H-indol-3-yl)-N-methylethan-1-amine mono-p-tosylate, crystalline N-ethyl-2-(5-fluoro-1H-indol-3-yl)-N-methylethan-1-amine hemimalate, and crystalline N-ethyl-2-(5-fluoro-1H-indol-3-yl)-N-methylethan-1-amine monosuccinate, pharmaceutical compositions comprising same, and uses thereof for treating mood disorders.
    Type: Grant
    Filed: September 14, 2023
    Date of Patent: October 29, 2024
    Assignee: Gilgamesh Pharmaceuticals, Inc.
    Inventors: Andrew Carry Kruegel, William Leong, Yameng He, Lauren MacEachern
  • Publication number: 20230277519
    Abstract: The present invention relates to IRAKIMiD degraders, their liquid formulations, and methods of use thereof for treating cancer.
    Type: Application
    Filed: January 13, 2023
    Publication date: September 7, 2023
    Inventors: Jared Gollob, Jeffrey Davis, Ashwin Gollerkeri, Reginald EWESUEDO, Alice McDonald, Vashali Dixit, Shu-Pei Wu, Michele Mayo, Haojing Rong, Sagar Agarwal, Bradley Enerson, Patrick Henrick, Rachelle Perea, Christopher Ho, William Leong, Duncan Walker
  • Publication number: 20230257399
    Abstract: The present invention provides compounds, compositions thereof, and processes for preparing same.
    Type: Application
    Filed: October 28, 2022
    Publication date: August 17, 2023
    Inventors: William LEONG, Dharyl Charles WILSON
  • Publication number: 20220185766
    Abstract: The present invention refers to a process for preparing a compound of formula (I) or a pharmaceutically acceptable salt thereof: wherein R is (C3-C10)alkyl, or ?-trifluoro(C3-C10)alkyl; R1 and R2 are, independently, hydrogen, hydroxy, (C1-C8) alkoxy, (C1-C8) alkylthio, halo, trifluoromethyl or 2,2,2-trifluoroethyl; or one of R1 and R2 is in ortho position to the R—O— group and, taken together with the same R—O—, represents a Formula (A) group where R0 is (C2-C9)alkyl; R3 and R4 are, independently, hydrogen, (C1-C4)alkyl; or R4 is hydrogen and R5 is a group selected from —CH2—OH, —CH2—O—(C1-C6)alkyl, —CH(CH3)—OH, —(CH2)2—S—CH3, benzyl and 4-hydroxybenzyl; or R4 and R5, taken together with the adjacent carbon atom, form a (C3-C6)cycloalkyl residue; R5 and R6 are independently hydrogen or (C1-C6)alkyl; or taken together with the adjacent nitrogen atom form a 5-6 membered monocyclic saturated heterocycle, optionally containing one additional heteroatom chosen among —O—, —S— and —NR7— where R7 is hydrogen or (C1-C
    Type: Application
    Filed: April 14, 2020
    Publication date: June 16, 2022
    Applicant: Newron Pharmaceuticals S.p.A.
    Inventors: William Leong, Dongxiao Lan, Weifang Zhang, Xiang Fang, Sizhong Wu
  • Patent number: 10584514
    Abstract: The invention is useful for upgrading a mechanical handle assembly to an electronic handle assembly without the need to remove the handle from the door or the like to which the handle is attached. The handle assembly (100) is of the type which is mountable to a surface of a door. Handle (18?) is moveable between a locked position and an unlocked position. A first housing useful for a mechanical locking handle is replaceable by a second housing (80) during conversion of the handle assembly from a mechanical version to an electronic version. Handle (18?) is received at least partially within the housing (80) and is substantially within housing (80) in the locked position. In the unlocked position, handle (18?) protrudes from the housing (80) and can be cause to swing sideways. Opening of the door when handle (18?) is in the locked position is prevented by a lock (24?). When converted to the electronic version, lock (24?) may remain but is capable of being unlocked by electronic actuation means (44, 78, 82).
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: March 10, 2020
    Assignee: TELEZYGOLOGY INC.
    Inventors: William Leong, Cary Maguire, Glenn Bevan, Craig Roughen
  • Publication number: 20150300047
    Abstract: The invention is useful for upgrading a mechanical handle assembly to an electronic handle assembly without the need to remove the handle from the door or the like to which the handle is attached. The handle assembly (100) is of the type which is mountable to a surface of a door. Handle (18?) is moveable between a locked position and an unlocked position. A first housing useful for a mechanical locking handle is replaceable by a second housing (80) during conversion of the handle assembly from a mechanical version to an electronic version. Handle (18?) is received at least partially within the housing (80) and is substantially within housing (80) in the locked position. In the unlocked position, handle (18?) protrudes from the housing (80) and can be cause to swing sideways. Opening of the door when handle (18?) is in the locked position is prevented by a lock (24?). When converted to the electronic version, lock (24?) may remain but is capable of being unlocked by electronic actuation means (44, 78, 82).
    Type: Application
    Filed: November 21, 2013
    Publication date: October 22, 2015
    Applicant: Telezygology, Inc.
    Inventors: William Leong, Cary Maguire, Glenn Bevan, Craig Roughen
  • Patent number: 7728135
    Abstract: The present invention is directed to the synthesis of 4-[4-[(R)-[1-[cyclopropylsulfonyl)-4-piperidinyl](3-fluorophenyl)methyl]-3(S)-methyl-1-piperazinyl]-1-[(4,6-dimethyl-5-pyrimidinyl)carbonyl]-4-methylpiperidine], and intermediates therefor from readily available starting materials by a novel route.
    Type: Grant
    Filed: January 5, 2006
    Date of Patent: June 1, 2010
    Assignee: Schering Corporation
    Inventors: Xiongwei Shi, Man Zhu, William Leong, Vilas Dahanukar, Ilia A. Zavialov, Cecelia Proietti, Shannon Zhao, Hong-Chang Lee, Yi Liu, Hoa N. Nguyen, Wenxue Wu, Bosco D'Sa, Feng Liang, Loc Thanh Tran
  • Publication number: 20100036125
    Abstract: The present invention is directed to the synthesis of 4-[4-[(R)-[1-[cyclopropylsulfonyl)-4-piperidinyl](3-fluorophenyl)methyl]-3(S)-methyl-1-piperazinyl]-1-[(4,6-dimethyl-5-pyrimidinyl)carbonyl]-4-methylpiperidine], and intermediates therefor from readily available starting materials by a novel route.
    Type: Application
    Filed: October 16, 2009
    Publication date: February 11, 2010
    Inventors: Xiongwei Shi, Man Zhu, William Leong, Vilas Dahanukar, Ilia A. Zavialov, Cecilia Proietti, Shannon Zhao, Hong-Chang Lee, Yi Liu, Hoa N. Nguyen, Wenxue Wu, Bosco D'Sa, Feng Liang, Loc Thanh Tran
  • Patent number: 7521452
    Abstract: The present invention is generally directed to a process to directly prepare pharmaceutically acceptable salts enriched with respect to selected rotameric salts of a basic compound, by creative choice of an acid and a solvent medium. The process is particularly useful in preparing specific rotamers of pharmaceutically useful salts in desired preponderance of a rotamer.
    Type: Grant
    Filed: January 5, 2006
    Date of Patent: April 21, 2009
    Assignee: Schering Corporation
    Inventors: Wenxue Wu, Loc Thanh Tran, Bosco D'Sa, Feng Liang, William Leong, Hong-Chang Lee, Kevin Klopfer, Vijay Sabesen
  • Publication number: 20090093496
    Abstract: The present invention is generally directed to a process to directly prepare pharmaceutically acceptable salts enriched with respect to selected rotameric salts of a basic compound, by creative choice of an acid and a solvent medium. The process is particularly useful in preparing specific rotamers of pharmaceutically useful salts in desired preponderance of a rotamer.
    Type: Application
    Filed: December 10, 2008
    Publication date: April 9, 2009
    Inventors: Wenxue Wu, Loc Thanh Tran, Bosco D'Sa, Feng Liang, William Leong, Hong-Chang Lee, Kevin Klopfer, Vijay Sabesan