1702-14-3Relevant articles and documents
An improved synthesis of pyridine-thiazole cores of thiopeptide antibiotics
Aulakh, Virender S.,Ciufolini, Marco A.
, p. 5750 - 5753 (2009)
(Figure Presented) The oxidation of 2-methylthiazoles to 2-formylthiazoles simplifies the implementation of the Bagley variant of the Bohlmann-Rahtz reaction as a key step in a concise new route to pyridine cores of thiopeptide antibiotics.
Development of novel isatin–nicotinohydrazide hybrids with potent activity against susceptible/resistant Mycobacterium tuberculosis and bronchitis causing–bacteria
Elsayed, Zainab M.,Eldehna, Wagdy M.,Abdel-Aziz, Marwa M.,El Hassab, Mahmoud A.,Elkaeed, Eslam B.,Al-Warhi, Tarfah,Abdel-Aziz, Hatem A.,Abou-Seri, Sahar M.,Mohammed, Eman R.
, p. 384 - 393 (2021/01/13)
Joining the global fight against Tuberculosis, the world's most deadly infectious disease, herein we present the design and synthesis of novel isatin-nicotinohydrazide hybrids (5a–m and 9a–c) as promising anti-tubercular and antibacterial agents. The anti-tubercular activity of the target hybrids was evaluated against drug-susceptible M. tuberculosis strain (ATCC 27294) where hybrids 5d, 5g and 5h were found to be as potent as INH with MIC = 0.24 μg/mL, also the activity was evaluated against Isoniazid/Streptomycin resistant M. tuberculosis (ATCC 35823) where compounds 5g and 5h showed excellent activity (MIC = 3.9 μg/mL). Moreover, the target hybrids were examined against six bronchitis causing-bacteria. Most derivatives exhibited excellent antibacterial activity. K. pneumonia emerged as the most sensitive strain with MIC range: 0.49–7.81 μg/mL. Furthermore, a molecular docking study has proposed DprE1 as a probable enzymatic target for herein reported isatin-nicotinohydrazide hybrids, and explored the binding interactions within the vicinity of DprE1 active site.
Green synthesis method of nicotinic acid ester compounds based on non-metallic conditions
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Paragraph 0079-0086; 0109-0112, (2021/09/29)
The invention discloses a green synthesis method based on nicotinic acid ester compounds under non-metallic conditions, and belongs to the technical field of organic synthesis. The method comprises the following steps of (III) replacing cyclopropanol and (II) substituted enamine ester as a raw material, taking tetramethyl piperidine nitrogen oxide as an oxidizing agent, 110 - 130 °C, stirring and reacting in an organic solvent to synthesize a (I) nicotinate compound. The invention provides a green synthesis method based on nicotinic acid ester compounds under non-metallic conditions, wherein cyclopropanols and enamine esters are taken as raw materials, and a polysubstituted nicotinate is synthesized through a strategy of oxidative dehydrogenation of ketene cyclization.
Synthesis of Functionalized Pyridines via Cu(II)-Catalyzed One-Pot Cascade Reactions of Inactivated Saturated Ketones with Electron-Deficient Enamines
Chen, Guang,Wang, Ze,Zhang, Xinying,Fan, Xuesen
, p. 11230 - 11237 (2017/10/27)
In this paper, a novel and efficient synthesis of 3-acylpyridines and pyridine-3-carboxylates through the oxidative one-pot sequential reactions of inactivated saturated ketones with electron-deficient enamines is presented. Mechanistically, the formation of the title compounds involves the in situ formation of an enone intermediate through an oxidative dehydrogenation of the saturated ketone substrate, followed by its [3+3] annulation with β-enaminone or β-enaminoester via a cascade process, including Michael addition, aldol type condensation, and oxidative aromatization.
