oxindole skeleton by anion-based methods provided additional substituted derivatives for structure-activity relationship studies. Their effects on neuronal celldeath induced by oxidative stress were evaluated by lactate dehydrogenase assay. Compounds with the alkyl chain length of 2–4 significantly suppressed the neuronal celldeath. No significant change occurred in the activity by substitution with
Synthesis and evaluation of oxindoles as promising inhibitors of the immunosuppressive enzyme indoleamine 2,3-dioxygenase 1
作者:Saurav Paul、Ashalata Roy、Suman Jyoti Deka、Subhankar Panda、Gopal Narayan Srivastava、Vishal Trivedi、Debasis Manna
DOI:10.1039/c7md00226b
日期:——
oxindoles from L-Trp, tryptamine and isatin. Compounds with C3-substituted oxindole moieties showed moderate inhibitory activity against the purified human IDO1 enzyme. Their optimization led to the identification of potent compounds, 6, 22, 23 and 25 (IC50 = 0.19 to 0.62 μM), which are competitive inhibitors of IDO1 with respect to L-Trp. These potent compounds also showed IDO1 inhibition potencies in
2-Oxotryptamines undergo intramolecular Mannich-type cyclization with acetone to give 2',2'-dimethylspiro[indole-3,3'-pyrrolidin]-2-ones. In presence of an alkylating reagent, this reaction gives the corresponding 1'-substituted products.
The practical and efficient conversion of indoles into the corresponding 2‐oxindoles is achieved under neutral conditions using a hypervalent iodine reagent. This oxidation is amenable to different substitutedindoles.
Characterization of 2-Oxindole Forming Heme Enzyme MarE, Expanding the Functional Diversity of the Tryptophan Dioxygenase Superfamily
作者:Yuyang Zhang、Yi Zou、Nelson L. Brock、Tingting Huang、Yingxia Lan、Xiaozheng Wang、Zixin Deng、Yi Tang、Shuangjun Lin
DOI:10.1021/jacs.7b05517
日期:2017.8.30
catalyze the insertion of two oxygen atoms from O2 into an indole ring to generate N-formylkynurenine (NFK)-like products. In contrast, MarE catalyzes the insertion of a single oxygen atom from O2 into an indole ring, to probably generate an epoxyindole intermediate that undergoes an unprecedented 2,3-hydride migration to form 2-oxindole structure. MarE shows substrate robustness to catalyze the conversion