1874-38-0Relevant academic research and scientific papers
Microwave-mediated Green synthesis of oxadiazole derivatives against inflammatory disease
Sahoo, Biswa Mohan,Panda, Jnyanaranjan,Banik, Bimal Krishna,Sahoo, Binayani
, p. 1307 - 1310 (2020/06/27)
A rapid and efficient microwave-mediated Green synthesis of oxadiazole derivatives (2a-e) is described based on reaction between benzohydrazide and various substituted benzoic acids. The use of microwave irradiation to carry out chemical reactions provide
Pyrimidine type antitumor compounds having 1,3,4-oxadiazole structure and preparation method and application thereof
-
, (2018/12/02)
The invention belongs to the technical field of medicines, relates to compounds having antitumor activity and having specific chemical structures, and particularly relates to pyrimidine type antitumorcompounds having a 1,3,4-oxadiazole structure and a preparation method and application thereof. The general structure formula of the pyrimidine type antitumor compounds is shown as follows in the description. The novel compounds greatly improve antitumor effects, and have more excellent anti-proliferation capability for human lung cancer A549 cells when compared with pyrimidine acylhydrazine compounds. Synthetic steps are simplified in a synthesis process, thus making future industrial production possible.
2,5-Diaryloxadiazoles and their precursors as novel inhibitors of cathepsins B, H and L
Garg, Shweta,Raghav, Neera
, p. 64 - 74 (2016/07/06)
High levels of cathepsins indicated in various pathological conditions like arthritis, cancer progressions, and atherosclerosis explains the need to explore potential inhibitors of these proteases which can be of great therapeutic significance. We, in the present work, report the synthesis of some 2,5-diaryloxadiazoles from N-subsitutedbenzylidenebenzohydrazides. The synthesized compounds were screened for their inhibitory potential on cathepsins B, H and L. Structure Activity Relationship studies show that 2,5-diaryloxadiazoles were less inhibitory than their precursors. 1i and 2k have been found to be most inhibitory to cathepsins B and L. Their Ki values have been calculated as 11.38 × 10-8 M and 66.4 × 10-8 M for cathepsin B and 4.2 × 10-9 M and 47.31 × 10-9 M for cathepsin L, respectively. However, cathepsin H activity was maximally inhibited by compounds, 1e and 2c with Ki values of 4.4 × 10-7 M and 5.6 × 10-7 M, respectively. Enzyme kinetic studies suggest that these compounds are competitive inhibitors to the enzymes. The results have been compared with docking results obtained using iGemDock.
Metal-Free Synthesis of 1,3,4-Oxadiazoles from N′-(Arylmethyl)hydrazides or 1-(Arylmethyl)-2-(arylmethylene)hydrazines
Shang, Zhenhua,Chu, Qianqian,Tan, Sheng
, p. 1032 - 1040 (2015/03/30)
An efficient and versatile metal-free synthesis of 1,3,4-oxadiazoles from N′-(arylmethyl)hydrazides or 1-(arylmethyl)-2-(arylmethylene)hydrazines through oxidative dehydrogenation is reported. A range of 2,5-disubstituted 1,3,4-oxadiazoles were prepared by treating N′-(arylmethyl)hydrazides with (diacetoxyiodo)benzene in acetonitrile or by treating 1-(arylmethyl)-2-(arylmethylene)hydrazines with [bis(trifluoroacetoxy)iodo]benzene in methyl tert-butyl ether. Aldehyde N-acylhydrazones and aldazines were initially generated in situ as intermediates.
Microwave promoted one-pot synthesis of 2-aryl substituted 1,3,4-oxadiazoles and 1,2,4-oxadiazole derivatives using Al3+-K10 clay as a heterogeneous catalyst
Suresh, Dhanusu,Kanagaraj, Kuppusamy,Pitchumani, Kasi
supporting information, p. 3678 - 3682 (2014/06/23)
An efficient, inexpensive method is developed for the one-pot synthesis of 2-aryl substituted 1,3,4-oxadiazoles and 1,2,4-oxadiazoles starting from acid hydrazides and trimethyl orthoformate under solvent-free, microwave conditions using a reusable Alsup
Visible-light-promoted aerobic oxidative cyclization to access 1,3,4-oxadiazoles from aldehydes and acylhydrazides
Yadav, Arvind K.,Yadav, Lal Dhar S.
supporting information, p. 2065 - 2069 (2014/04/03)
A novel and practical access to symmetrical and unsymmetrical 2,5-disubstituted 1,3,4-oxadiazoles directly from aldehydes and acylhydrazides using visible light irradiation under an air atmosphere in the presence of eosin Y as an organophotoredox catalyst at rt is reported. This is the first example of oxidative cyclization of acylhydrazones employing air and visible light as inexpensive, readily available, non-toxic, and sustainable reagents.
Electrosynthesis and screening of novel 1,3,4-oxadiazoles as potent and selective antifungal agents
Singh, Sushma,Sharma, Laxmi Kant,Saraswat, Apoorv,Siddiqui, Ibadur R.,Kehri, Harbans K.,Singh, Rana K. Pal
, p. 4237 - 4245 (2013/05/08)
The electrochemical oxidation of aldehyde-N-aroylhydrazone has been studied in the presence of NaClO4 as supporting electrolyte in MeOH solution using cyclic voltammetry and controlled potential electrolysis. The results indicate that intramolecular cyclization of aldehyde-N-aroylhydrazone has been successfully performed at a platinum electrode in an undivided cell with good yields of the corresponding 1,3,4-oxadiazoles at ambient conditions. The reaction products were characterized by spectroscopic methods and a mechanism was deduced from voltammetry studies. The antifungal activity of the synthesized compounds was evaluated on Fusarium oxysporum, Alternaria solani, Candida albicans and Aspergillus niger. The results revealed that all the synthesized compounds have significant antifungal activity against the tested fungi. Among the synthesized derivatives 7b, 7d, 7g, 7h, 7i, 7j and 7r were found to be the most effective antifungal compounds. The Royal Society of Chemistry 2013.
One-pot, three component synthesis of 2,5-disubstituted 1,3,4-oxadiazoles catalyzed by heteropolyacid
Heravi, Majid M.,Zadsirjan, Vahideh,Bakhtiari, Khadijeh,Bamoharram, Fatemeh F.
, p. 259 - 263 (2013/03/29)
H6[PMo9V3O40] was used as an efficient catalyst for the preparation of 1-aroyl-2-arylidene hydrazines. 2,5-Disubstituted 1,3,4-oxadiazoles have been synthesized by oxidation of 1-aroyl-2-arylidene hydrazines with CrO3 in excellent yields.
I2-mediated oxidative C-O bond formation for the synthesis of 1,3,4-oxadiazoles from aldehydes and hydrazides
Yu, Wenquan,Huang, Gang,Zhang, Yueteng,Liu, Hongxu,Dong, Lihong,Yu, Xuejun,Li, Yujiang,Chang, Junbiao
, p. 10337 - 10343 (2013/11/06)
A practical and transition-metal-free oxidative cyclization of acylhydrazones into 1,3,4-oxadiazoles has been developed by employing stoichiometric molecular iodine in the presence of potassium carbonate. The conditions of this cyclization reaction also work well with crude acylhydrazone substrates obtained from the condensation of aldehydes and hydrazides. A series of symmetrical and asymmetrical 2,5-disubstituted (aryl, alkyl, and/or vinyl) 1,3,4-oxadiazoles can be conveniently generated in an efficient and scalable fashion.
Microwave-assisted one-step synthesis of 2,5-disubstituted-1,3,4- oxadiazoles using 1,4- bis(triphenylphosphonium)-2-butene peroxodisulfate
Gorjizadeh, Maryam,Afshari, Mozhgan,Nazari, Simin
, p. 1627 - 1630 (2014/05/06)
A series of 1,3,4-oxadiazoles were efficiently synthesized from the cyclization-oxidation reaction of acyl hydrazones by using 1,4- bis(triphenylphosphonium)-2-butene peroxodisulfate as an oxidant in solvent-free medium under microwave irradiation.
