51589-62-9Relevant academic research and scientific papers
Photo- and thermochromic spiropyrans 43. Spectral kinetic study of new benzoxazolyl-substituted spirobenzopyrans
Rostovtseva, Irina A.,Solov'Eva, Ekaterina V.,Chernyshev, Anatoly V.,Voloshin, Nikolai A.,Trofimova, Nadezhda S.,Metelitsa, Anatoly V.
, p. 223 - 228 (2015)
[Figure not available: see fulltext.] A series of spiroindolinebenzopyrans was prepared, containing a chelating 1,3-benzoxazole group at position 8 of the benzopyran fragment. These new benzoxazolyl-substituted spirobenzopyrans showed photochromic propert
Highly efficient AgNO3-catalyzed approach to 2-(benzo[d]azol-2-yl)phenols from salicylaldehydes with 2-aminothiophenol, 2-aminophenol and benzene-1,2-diamine
He, Xinwei,Wu, Yuhao,Jin, Wenjing,Wang, Xiaoshun,Wu, Cong,Shang, Yongjia
, (2018/02/13)
A new, convenient and efficient AgNO3-catalyzed strategy for the preparation of 2-(benzo[d]azol-2-yl)phenol derivatives in good to excellent yields (63–98%) is described. The reaction proceeds via condensation/intramolecular nucleophilic addition/oxidation process between substituted salicylaldehydes and 2-aminothiophenol, 2-aminophenol or benzene-1,2-diamine under mild reaction conditions. Notably, this reaction utilizes cheap AgNO3 as a readily available and low-cost benign oxidant at low catalyst loadings with excellent functional group tolerance.
Rhodium(III)-Catalyzed ortho-Heteroarylation of Phenols through Internal Oxidative C-H Activation: Rapid Screening of Single-Molecular White-Light-Emitting Materials
Li, Bijin,Lan, Jingbo,Wu, Di,You, Jingsong
, p. 14008 - 14012 (2016/01/25)
Reported herein is the first example of a transition-metal-catalyzed internal oxidative C-H/C-H cross-coupling between two (hetero)arenes through a traceless oxidation directing strategy. Without the requirement of an external metal oxidant, a wide range of phenols, including phenol-containing natural products, can undergo the coupling with azoles to assemble a large library of highly functionalized 2-(2-hydroxyphenyl)azoles. The route provides an opportunity to rapidly screen white-light-emitting materials. As illustrative examples, two bis(triphenylamine)-bearing 2-(2-hydroxyphenyl)oxazoles, which are difficult to access otherwise, exhibit bright white-light emission, high quantum yield, and thermal stability. Also presented is the first example of the white-light emission, in a single excited-state intramolecular proton transfer system, of 2-(2-hydroxyphenyl)azoles, thus highlighting the charm of C-H activation in the discovery of new organic optoelectronic materials.
Palladium catalyzed Csp2-H activation for direct aryl hydroxylation: The unprecedented role of 1,4-dioxane as a source of hydroxyl radicals
Seth, Kapileswar,Nautiyal, Manesh,Purohit, Priyank,Parikh, Naisargee,Chakraborti, Asit K.
supporting information, p. 191 - 194 (2015/01/09)
A novel strategy for direct aryl hydroxylation via Pd-catalysed Csp2-H activation through an unprecedented hydroxyl radical transfer from 1,4-dioxane, used as a solvent, is reported with bio relevant and sterically hindered heterocycles and various acyclic functionalities as versatile directing groups.
Synthesis and in vitro antibacterial and antifungal activities of benzoxazole derivatives
Khan, Khalid Mohammed,Karim, Aneela,Ambreen, Nida,Amyn, Afroz,Saied, Sumayya,Ahmed, Aqeel,Perveen, Shahnaz
, p. 894 - 900 (2013/07/26)
The in vitro antibacterial and antifungal activities of twenty-nine (29) benzoxazole derivatives were tested against fifteen Gram-positive and sixteen Gram-negative strains. Out of the twenty-nine compounds, eighteen compounds 3-5, 7-9, 11-13, 15-25 showed a broad range of activity against tested Gram-positive microorganisms, whereas rest of the compounds 6, 10, 14 and 26-31 were found to be completely inactive against all the tested strains of Gram-positive bacteria. Five compounds 8, 11-13, and 15 showed activities against Gram-negative strains whereas the rest were devoid of any activity. Twenty-one (21) out of twenty-nine (29) compounds possessed antifungal activity. The structures of the synthetic compounds were confirmed by IR, EIMS and 1HNMR spectral data.
2-(2'-Hydroxyphenyl)benzothiazoles, -benzoxazoles, and -benzimidazoles for Plastic Scintillation Applications
Pla-Dalmau, Anna
, p. 5468 - 5473 (2007/10/02)
A new series of fluorescent compounds has been tested as dopants for plastic scintillation applications.Several 2-(2'-hydroxyphenyl)benzothiazole, -benzoxazole, and -benzimidazole derivative have been prepared and studied in a polystyrene matrix.Each deri
