Design, Synthesis, and Characterization of 3-(Benzylidene)indolin-2-one Derivatives as Ligands for α-Synuclein Fibrils
摘要:
A series of 3-(benzylidine)indolin-2-one derivatives were synthesized and evaluated for their in vitro binding to alpha synuclein (alpha-syn), beta amyloid (A beta), and tau fibrils. Compounds with a single double bond in the 3-position had only a modest affinity for alpha-syn and no selectivity for alpha-syn versus A beta or tau fibrils. Homologation to the corresponding diene analogues yielded a mixture of Z,E and E,E isomers; substitution of the indoline nitrogen with an N-benzyl group resulted in increased binding to alpha-syn and reasonable selectivity for alpha-syn versus and tau. Introduction of a para-nitro group into the benzene ring of the diene enabled separation of the Z,E and E,E isomers and led to the identification of the Z,E configuration as the more active regioisomer. The data described here provide key structural information in the design of probes which bind preferentially to alpha-syn versus A beta or tau fibrils.
Discovery of hybrids of indolin-2-one and nitroimidazole as potent inhibitors against drug-resistant bacteria
作者:Yuanzheng Zhou、Yuan Ju、Yang Yang、Zitai Sang、Zhenling Wang、Gu He、Tao Yang、Youfu Luo
DOI:10.1038/s41429-018-0076-5
日期:2018.10
With antibiotics resistance developing rapidly, new antibacterial agents are needed to be discovered. We readily synthesized 11 indolin-2-one compounds and found a hybrid of indolin-2-one and nitroimidazole 3-((1-methyl-5-nitro-1H-imidazol-2-yl)methylene)indolin-2-one to be effective on Staphylococcus aureus strains. Six derivatives of this compound were further designed and synthesized in order to enhance its efficacy. After a second turn of structural refinement, a novel hybrid of indolin-2-one and nitroimidazole 3-((1-methyl-5-nitro-1H-imidazol-2-yl)methylene)-5-nitroindolin-2-one with a nitro group on C-5 position of indolin-2-one was shown to exhibit remarkable antibacterial activities with a low MIC value against MRSA ATCC 33591. Besides, this molecule demonstrated its potency on Gram-negative bacteria and VRE strain. The time-killing curve experiment showed its good bactericidal activity. Low hemolytic rate suggested its promising safety profile.
reusable catalyst for the C3-selective alkenylation of oxindole with aldehydes under solvent-free conditions. This catalytic method is generally applicable to different aromatic and aliphatic aldehydes, giving 3-alkyledene-oxindoles in high yields (87%–99%) and high stereoselectivities (79%–93% to E-isomers). This is the first example of the catalytic synthesis of 3-alkenyl-oxindoles from oxindole and
Towards multi-target antidiabetic agents: In vitro and in vivo evaluation of 3,5-disubstituted indolin-2-one derivatives as novel α-glucosidase inhibitors
作者:Vladlen G. Klochkov、Elena N. Bezsonova、Meriam Dubar、Daria D. Melekhina、Victor V. Temnov、Ekaterina V. Zaryanova、Natalia A. Lozinskaya、Denis A. Babkov、Alexander A. Spasov
DOI:10.1016/j.bmcl.2021.128449
日期:2022.1
2-oxindole derivatives as GSK3β inhibitors with in vivo antihyperglycemic activity. α-Glucosidase is another antidiabetic target that prevents postprandial hyperglycemia and corresponding hyperinsulinemic response. Herein we report a study of 3,5-disubstituted indolin-2-one derivatives as potent α-glucosidaseinhibitors. These inhibitors were identified via efficient synthesis, in vitro screening,
Synthesis and study of 3-(triphenylphosphoranylidene)-2,3-dihydro-1H-indol-2-one
作者:George E. Lathourakis、Konstantinos E. Litinas
DOI:10.1039/p19960000491
日期:——
The reaction of isatin 1 (2,3-dihydroindole-2,3-dione) and triphenylphosphine 2 afforded the new title compound 6 and isoindigo 7 and not the earlier proposed indirubin 3. Wittig reactions of 6 with the benzaldehydes 8a–c gave the corresponding (Z-)- and (E)-3-(arylmethylidene)-2, 3-dihydro-1H-indol-2-ones 9a–c and 10a–c, respectively, in moderate yields.