- Repurposing an Aldolase for the Chemoenzymatic Synthesis of Substituted Quinolines
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Quinoline derivatives are important natural products and pharmaceuticals, but their synthesis can be challenging due to poor yields, harsh reaction conditions, and instability of starting materials. Here we report the chemoenzymatic synthesis of quinaldic acids under mild conditions using an aldolase, trans-o-hydroxybenzylidenepyruvate hydratase-aldolase (NahE, or HBPA). A series of 2-aminobenzaldehydes derived from reduction of the corresponding nitro analogue were reacted with pyruvate in the presence of NahE to give substituted quinolines in up to 93% isolated yield. This reaction differs from the aldol condensation catalyzed by NahE in vivo, instead resembling the heterocycle formation catalyzed by its homologue, dihydrodipicolinate synthase.
- Fansher, Douglas J.,Granger, Richard,Kaur, Satinderpal,Palmer, David R. J.
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p. 6939 - 6943
(2021/06/28)
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- COMPOUNDS FOR MODULATING FXR
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Provided herein are compounds of Formula (I), a stereoisomer, enantiomer or a pharmaceutically acceptable salt thereof; wherein variables are as defined herein; and their pharmaceutical compositions, which are useful as modulators of the activity of Farnesoid X receptors (FXR).
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- Discovery and efficient synthesis of a biologically active alkaloid inspired by thiostrepton biosynthesis
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Thiostrepton, a natural peptide macrocycle, is of great interest due to its structural complexity and numerous biological activities, including anti-bacterial, anti-tumor, and anti-plasmodial activities. The quinaldic acid (QA) moiety-containing side ring (loop 2) was proven to play an important role in carrying out these functions. Previously, we proposed biosynthetic logic for thiostrepton loop 2 and demonstrated the formation mechanism of QA. Herein, we report the discovery and efficient synthesis of a biologically active alkaloid, that is, a key intermediate involved in the thiostrepton biosynthetic pathway. A chemo-enzymatic method was performed to synthesize the molecule, and a series of analogs were prepared for bioassays, which included the examination of anti-bacterial and anti-tumor activities.
- Zheng, Qingfei,Wang, Shoufeng,Liu, Wen
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p. 7686 - 7690
(2014/12/10)
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- GEMINALLY SUBSTITUTED CYANOETHYLPYRAZOLO PYRIDONES AS JANUS KINASE INHIBITORS
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The instant invention provides compounds of Formula (I) which are JAK inhibitors, and as such are useful for the treatment of JAK-mediated diseases such as rheumatoid arthritis, asthma, COPD and cancer.
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Page/Page column 120
(2014/10/03)
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- NOVEL INHIBITORS OF HEPATITIS C VIRUS REPLICATION
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The embodiments provide compounds of the general Formulae I, II, III, IV, or V as well as compositions, including pharmaceutical compositions, comprising a subject compound. The embodiments further provide treatment methods, including methods of treating a hepatitis C virus infection and methods of treating liver fibrosis, the methods generally involving administering to an individual in need thereof an effective amount of a subject compound or composition.
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Page/Page column 270
(2011/07/06)
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- PYRIDONE DERIVATIVES
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The present invention discloses phenylpyridone derivative compounds. The compounds act as a melanin concentrating hormone receptor antagonists, and can be used in preventing, treating or acting as a remedial agent for various circular system diseases, nervous system diseases, metabolic diseases, genital diseases, respiratory diseases and digestive diseases.
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Page/Page column 37
(2011/11/01)
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- Vanilloid receptor ligands and their use in treatments
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Compounds having the general structure and compositions containing them, for the treatment of acute, inflammatory and neuropathic pain, dental pain, general headache, migraine, cluster headache, mixed-vascular and non-vascular syndromes, tension headache, general inflammation, arthritis, rheumatic diseases, osteoarthritis, inflammatory bowel disorders, inflammatory eye disorders, inflammatory or unstable bladder disorders, psoriasis, skin complaints with inflammatory components, chronic inflammatory conditions, inflammatory pain and associated hyperalgesia and allodynia, neuropathic pain and associated hyperalgesia and allodynia, diabetic neuropathy pain, causalgia, sympathetically maintained pain, deafferentation syndromes, asthma, epithelial tissue damage or dysfunction, herpes simplex, disturbances of visceral motility at respiratory, genitourinary, gastrointestinal or vascular regions, wounds, burns, allergic skin reactions, pruritus, vitiligo, general gastrointestinal disorders, gastric ulceration, duodenal ulcers, diarrhea, gastric lesions induced by necrotising agents, hair growth, vasomotor or allergic rhinitis, bronchial disorders or bladder disorders.
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Page/Page column 22
(2008/06/13)
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- Bicyclo 4.4.0 antiviral derivatives
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This invention provides compounds having drug and bio-affecting properties, their pharmaceutical compositions and method of use. In particular, the invention is concerned with amido piperazine derivatives. These compounds possess unique antiviral activity
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Page/Page column 31
(2008/06/13)
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- The synthesis of labelled forms of saquinavir
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The development of the HIV-protease inhibitor, saquinavir (Ro 31-8959), required a range of analytical methods for the measurement of the parent drug and drug-related material in biological fluids. This paper describes the synthesis of 14-carbon and tritium labelled compounds used for in vivo and in vitro investigations of the absorption and disposition of saquinavir in animals and man. It also discusses the preparation of saquinavir labelled with deuterium and stable isotopes of carbon and nitrogen. These forms of the drug were needed for bioequivalence studies in which HPLC/MS/MS was employed for the measurement of plasma concentrations. Finally, the synthesis of a 125-iodine labelled tracer used in a radioimmunoassay for saquinavir is described.
- Wiltshire,Prior,Dhesi,Trach,Schlageter,Schoenenberger
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p. 1103 - 1126
(2007/10/03)
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