1,3-Diarylpyrazolyl-acylsulfonamides as Potent Anti-tuberculosis Agents Targeting Cell Wall Biosynthesis in <i>Mycobacterium tuberculosis</i>
作者:Lutete Peguy Khonde、Rudolf Müller、Grant A. Boyle、Virsinha Reddy、Aloysius T. Nchinda、Charles J. Eyermann、Stephen Fienberg、Vinayak Singh、Alissa Myrick、Efrem Abay、Mathew Njoroge、Nina Lawrence、Qin Su、Timothy G. Myers、Helena I. M. Boshoff、Clifton E. Barry、Frederick A. Sirgel、Paul D. van Helden、Lisa M. Massoudi、Gregory T. Robertson、Anne J. Lenaerts、Gregory S. Basarab、Sandeep R. Ghorpade、Kelly Chibale
DOI:10.1021/acs.jmedchem.1c00837
日期:2021.9.9
Compounds are bactericidal in vitro against replicating Mtb and retained activity against multidrug-resistant clinical isolates. Initial biology triage assays indicated cell wall biosynthesis as a plausible mode-of-action for the series. However, no cross-resistance with known cell wall targets such as MmpL3, DprE1, InhA, and EthA was detected, suggesting a potentially novel mode-of-action or inhibition.
Stereoselective Direct
<i>N</i>
‐Trifluoropropenylation of Heterocycles with a Hypervalent Iodonium Reagent
作者:János T. Csenki、Ádám Mészáros、Zsombor Gonda、Zoltán Novák
DOI:10.1002/chem.202102840
日期:2021.11.11
E-selective trifluoropropenylation of versatile N-heterocycles was developed with the utilization of trifluoropropenyliodonium salts. The procedure enables the straightforward direct introduction of the trifluoroalkenyl moiety into heterocyclic scaffolds under simple and mild reaction conditions.
The diaza-Nazarov cyclization involving a 2,3-diaza-pentadienyl cation for the synthesis of polysubstituted pyrazoles
作者:Balakrishna Aegurla、Rama Krishna Peddinti
DOI:10.1039/c7ob01949a
日期:——
diaza-Nazarov (DAN) type cyclization for the construction of substituted pyrazoles from easily available starting materials via an enamine–iminium ion intermediate is described. The oxidative cyclization worked under green conditions with remarkable regioselectivity. This one-pot, efficient and operationally simple three-component intramolecular regioselective DAN cyclization displayed a wide range of
Novel tandem reactions of 2,2′-sulfonylbis(1,3-diarylprop-2-en-1-ones) with hydrazine: formation of 3,6-diarylpyridazines and 3,5-diarylpyrazoles
作者:M Gnanadeepam、S Selvaraj、S Perumal、S Renuga
DOI:10.1016/s0040-4020(02)00095-9
日期:2002.3
The 2,2′-sulfonylbis(1,3-diarylprop-2-en-1-ones) undergo tandem reactions with hydrazine affording 3,6-diarylpyridazines and 3,5-diarylpyrazoles unexpectedly, the latter predominating.
A convenient one pot procedure for the synthesis of 3,5-disubstituted pyrazoles by condensation of chalcones, hydrazine hydrate and sulfur in ethanol under microwave irradiation and conventional heating method is reported. The hydrogen sulfide is produced during the reaction. The pyrazoles are obtained in good yields and excellent state of purity. The structures of new compounds were confirmed by IR
据报道,在微波辐射和常规加热方法下,通过查耳酮,水合肼和硫在乙醇中的缩合反应,可以方便地一锅法合成3,5-二取代的吡唑。在反应过程中产生硫化氢。以良好的产率和优异的纯度获得吡唑。通过IR,1 H和13 C NMR,MS和元素分析确认了新化合物的结构。