Synthesis of Bis‐(2‐mercaptoimidazole)‐4,4‐butylidene

Abstract

Ethyl butylidene‐bis‐3‐phthalimidoacetoacetate (II) was prepared by condensation of ethyl‐3‐phthalimido‐acetoacetate and n‐butyraldehyde in the presence of piperidine in benzene. Compound II was hydrolysed by hydrochloric acid followed by cyclization with potassium thiocyanate to yield bis(2‐mercaptoimidazole)‐4,4‐butylidene (IV).

Molecularly engineered hole-transport material for low-cost perovskite solar cells

“…In fact, they display distinctive photochemical and photophysical properties, including chemical and thermal stability, as well as their manifestation in two cis – trans isomeric forms, which easily and reversibly convert into one another. 59 Consequently, aromatic AZO compounds have been already exploited in the chemical industry as dyes/pigments, 60 therapeutic agents, 61 radical reaction initiators, 62 drug delivery systems, 63 nonlinear optics, 64 photochemical molecular switches, 65 molecular shuttles, 66 nanotubes, 67 and eye glasses and optical filters. 68 Specifically for PSCs, the cis – trans isomerisation of aromatic AZO derivatives could be exploited to modulate the hole mobility of TPA-based HTMs.…”

Facile Cu(I)-Catalyzed Oxidative Coupling of Anilines to Azo Compounds and Hydrazines with Diaziridinone under Mild Conditions

“…Development of efficient methods for the synthesis of azo compounds is highly important as this class of molecules can be used as organic dyes, 1 indicators, 2 radical reaction initiators, 3 nonlinear optics, 4 chemosensors, 5 and photochemical switches. 6 Various synthetic methods 7 have been developed including oxidation of hydrazines, 8 reduction of azoxybenzenes, 9 coupling of aryl diazonium salts with nucleophiles, 10 coupling of primary anilines with aromatic nitroso compounds, 11 and reductive coupling of nitroaromatics.…”

Bifunctional Cs−Au/Co3O4 (Basic and Redox)‐Catalyzed Oxidative Synthesis of Aromatic Azo Compounds from Anilines

“…Azo compounds with −N=N− functionalities are an essential class of chemicals used in food additives, pharmaceuticals, and other modern science applications such as liquid crystal displays, [16] dyes, [17] therapeutic agents, [18,19] pigments, [20] optical media storage, [21] and reaction indicators [22] . They are mostly suitably accessed by oxidative dehydrogenative coupling of anilines.…”