Unsaturated compounds containing nitrogen. Part 4. Further reactions of 1-chloro-2,3-diazabutadienes with S-nucleophiles
作者:William T. Flowers、John F. Robinson、David R. Taylor、Anthony E. Tipping
DOI:10.1039/p19810000349
日期:——
1-Chloro-1,4-diaryl-2,3-diazabutadienes (Ar1CClNNCHAr2), prepared by the reaction of thionyl chloride with aroylhydrazones (Ar1CONHNCHAr2), react with thiosemicarbazide or thiocarbohydrazide to give 2-arylidenehydrazino-5-aryl-1,3,4-thiadiazoles, and with potassium thiocyanate to give 1-thiocyanato-1,4-diaryl-2,3-diaza-butadienes which isomerize thermally to arylideneamino-5-aryl-1,3,4-thiadiazoles
Antibacterial activity of chalcones, hydrazones and oxadiazoles against methicillin-resistant Staphylococcus aureus
作者:Thaís Moreira Osório、Franco Delle Monache、Louise Domeneghini Chiaradia、Alessandra Mascarello、Taisa Regina Stumpf、Carlos Roberto Zanetti、Douglas Bardini Silveira、Célia Regina Monte Barardi、Elza de Fatima Albino Smânia、Aline Viancelli、Lucas Ariel Totaro Garcia、Rosendo Augusto Yunes、Ricardo José Nunes、Artur Smânia
DOI:10.1016/j.bmcl.2011.11.059
日期:2012.1
The increase in antibiotic resistance due to multiple factors has encouraged the search for new compounds which are active against multidrug-resistant pathogens. In this context, chalcones, dihydrochalcones, hydrazones and oxadiazoles were tested against Staphylococcus aureus ATCC 25923 and methicillin-resistant S. aureus (MRSA) isolates, which were obtained from clinical laboratories and were characterized as MRSA using traditional and molecular methods. Among 65 tested compounds, two chalcones, one dihydrochalcone and two hydrazones were active against MRSA. Based on the minimal inhibitory concentration and cytotoxicity, hydrazones provided a better selectivity index than chalcones. Active hydrazones are promising antibiotic-like substances and they should be the subject of further microbiological studies. (C) 2011 Elsevier Ltd. All rights reserved.
Fast Synthesis of <i>N</i>-Acylhydrazones Employing a Microwave Assisted Neat Protocol
作者:Marta M. Andrade、Maria Teresa Barros
DOI:10.1021/cc9001444
日期:2010.3.8
A variety of N-acylhydrazones were synthesized Under microwave irradiation within 2.5-10 min, starting from benzo, salicyloyl, and isonicotinic hydrazides. The protocol developed employs microwave irradiation in the absence of solvents and catalysts, leading to high yields. The results are reproducible in a 500 mg to 5 g scale.
Grammaticakis, Bulletin de la Societe Chimique de France, 1956, p. 109,115
作者:Grammaticakis
DOI:——
日期:——
Anusha, D.; Prakasham, R. S.; Praveena, G., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2021, vol. 60, # 1, p. 117 - 126
作者:Anusha, D.、Prakasham, R. S.、Praveena, G.、Raju, B. China、Tiwari, A. K.、Zehra, A.