Synthesis and Study of the Structure of Palladium(II) Acyclic Diaminocarbene Complexes Containing a 1,2,4-Oxadiazole Moiety

2‐(1,2,4‐Oxadiazol‐5‐yl)aniline as a New Scaffold for Blue Luminescent Materials

“…Amine 4 a was prepared via condensa-tion of amidoxime 1 a and isatoic anhydride 2 a as previously described. [44] Compounds 5-8 were synthesized from amidoximes and appropriate esters according to the previously published our protocols, [35,46,47] whereas amine 10 was obtained via reduction of nitro-precursor 9. [45] The performed brief investigation of photophysical properties of compounds 4 a-8 and 10 in MeCN solution showed, that only compounds 4 a-6 emit, whereas amines 7, 8, and 10 have not luminescence (Table 1).…”

“…Amine 4 a was prepared via condensation of amidoxime 1 a and isatoic anhydride 2 a as previously described [44] . Compounds 5 – 8 were synthesized from amidoximes and appropriate esters according to the previously published our protocols, [35,46,47] whereas amine 10 was obtained via reduction of nitro‐precursor 9 [45] …”

“…We have come close to solving this problem by developing methodology to synthesis of 1,2,4‐oxadizoles form amidoximes and carboxylic acid derivatives in MOH/DMSO medium at ambient temperature [34–37] . This approach allows to obtain 1,2,4‐oxadiazoles with diverse functionalities, including C=C multiple bonds, [38] urea [39,40] and carboxylic substituents, [41–43] as well as animo‐groups [44–46] . It was found that some anilines bearing 1,2,4‐oxadiazole moiety intensely emit in the blue region.…”

“…[34][35][36][37] This approach allows to obtain 1,2,4oxadiazoles with diverse functionalities, including C=C multiple bonds, [38] urea [39,40] and carboxylic substituents, [41][42][43] as well as animo-groups. [44][45][46] It was found that some anilines bearing 1,2,4-oxadiazole moiety intensely emit in the blue region. Since such amines are synthetically available (taking into account our achievements in the synthesis of 1,2,4-oxadiazoles) and have a lot of possibilities for further modification, in this work we studied the possibility of creating luminescent materials based on them.…”

Room Temperature Synthesis of Bioactive 1,2,4-Oxadiazoles

“…In addition, aryl esters bearing strong electron-donating substituents such as hydroxyl or amino groups at the para -position of the aromatic ring are not reactive in these conditions. Later, Yun Young Go et al [ 104 ] and Kinzhalov et al [ 105 ] showed that mild heating (30–60 °C) led to obtaining 1,2,4-oxadiazoles with unprotected primary arylamino functionalities. At the same time, Teleb with colleagues successfully performed the reaction with salicylic esters at RT [ 106 ].…”