- Metal free [4+1] and [5+1] annulation reactions to prepare heterocycles using DMF and its derivatives as one-carbon source
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1,2,4-Triazolo[3,4-a]pyridines and related heterocycles and substituted triazines were commonly discovered scaffolds in a variety of pharmaceutical and agrochemical agents. Herein, we report a highly efficient and practical method using DMF and its derivative for the [4+1] and [5+1] annulation reactions to prepare these heterocycles. This metal free reaction takes advantages of shelf stable DMF as solvent and carbon donor, imidazole chloride as a catalyst, the mild reaction condition tolerates a broad substrate range and substitutes. The prepared 3-unsubstituted 1,2,4-triazolo[3,4-a]pyridine and derivatives allow further introduction of a variety of functional group1 at 3-position.
- Liu, Lingfeng,Qiao, Chunhua,Shen, Bei,Xu, Yiwen
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supporting information
(2020/04/01)
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- Discovery of Molidustat (BAY 85-3934): A Small-Molecule Oral HIF-Prolyl Hydroxylase (HIF-PH) Inhibitor for the Treatment of Renal Anemia
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Small-molecule inhibitors of hypoxia-inducible factor prolyl hydroxylases (HIF-PHs) are currently under clinical development as novel treatment options for chronic kidney disease (CKD) associated anemia. Inhibition of HIF-PH mimics hypoxia and leads to increased erythropoietin (EPO) expression and subsequently increased erythropoiesis. Herein we describe the discovery, synthesis, structure–activity relationship (SAR), and proposed binding mode of novel 2,4-diheteroaryl-1,2-dihydro-3H-pyrazol-3-ones as orally bioavailable HIF-PH inhibitors for the treatment of anemia. High-throughput screening of our corporate compound library identified BAY-908 as a promising hit. The lead optimization program then resulted in the identification of molidustat (BAY 85-3934), a novel small-molecule oral HIF-PH inhibitor. Molidustat is currently being investigated in clinical phase III trials as molidustat sodium for the treatment of anemia in patients with CKD.
- Beck, Hartmut,Jeske, Mario,Thede, Kai,Stoll, Friederike,Flamme, Ingo,Akbaba, Metin,Ergüden, Jens-Kerim,Karig, Gunter,Keldenich, J?rg,Oehme, Felix,Militzer, Hans-Christian,Hartung, Ingo V.,Thuss, Uwe
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supporting information
p. 988 - 1003
(2018/04/19)
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- SUBSTITUTED DIHYDROPYRAZOLONES FOR TREATING CARDIOVASCULAR AND HEMATOLOGICAL DISEASES
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The invention relates to dihydropyrazolon-derivatives of formula (I), to methods for their production, to their use for treating and/or for preventing diseases and their use for producing medicaments for treating and/or for preventing diseases, in particular cardiovascular and haematological diseases, kidney diseases and for promoting the healing of wounds.
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Page/Page column 22
(2010/12/29)
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- 2-Pyridylnitrene-1,3-diazacyclohepta-1,2,4,6-tetraene rearrangements in the trifluoromethyl-2-pyridyl azide series
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Photolysis of Ar matrix isolated trifluoromethyl-substituted 2-pyridyl azides/tetrazolo[1,5-a]pyridines at 12-18 K causes rapid and mostly clean conversion to the corresponding 1,3-diazacyclohepta-1,2,4,6-tetraenes (4D, 5D, 5,6D, and 4,6D) absorbing near 2000 cm-1 in the IR. In the latter case, the intermediate 3,5-bis(trifluoromethyl)-2-pyridylnitrene (4,6N) was observed by both ESR and IR spectroscopy and converted to the diazacycloheptatetraene 4,6D in the course of 90 min of UV irradiation. The 2-pyridylnitrenes were generally observable by ESR spectroscopy (D/hc ~ 1.05-1.10; E/hc ~ 0.0 cm-1) following both photochemical and thermal (FVP) generation from the 2-azidopyridines. Irradiation of the Ar matrix isolated mixtures of nitrenes and diazacycloheptatetraenes also caused development of weak carbene transitions (D/hc ~ 0.40-0.45; E/hc ~ 0.006 cm-1) in the ESR spectra.
- Evans,Wah Wong,Wentrup
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p. 4009 - 4017
(2007/10/03)
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- Trifluoromethyl-substituted Dehydrodiazepines and Cyanopyrroles from Azido-/Tetrazolo-pyridines
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1,2-Didehydro-1,3-diazepines 4D, 5D, 4,6D and 5,6D are identified as unique products of both photolysis and thermolysis of azido-/tetrazolo-pyridines; the ultimate thermolysis products are trifluoromethylpyrrolecarbonitriles (7-9, 11-13 and 16-18).
- Evans, Richard A.,Wentrup, Curt
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p. 1062 - 1064
(2007/10/02)
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