4-Hexylresorcinol-derived hydroxyazobenzocrown ethers as chromoionophores

(1E,2E)-1,2-Bis[1-(3-nitrophenyl)ethylidene]hydrazine

“…Data collection: APEX2 (Bruker, 2009); cell refinement: SAINT (Bruker, 2009); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009 Hydrazones have been intensively investigated mostly because of their potential applications as antibacterial and antifungal drugs (Khanmohammadi et al, 2008) and as fluorescent chemosensors for metal ions (Luboch et al, 2009).…”

“…For the biological acivity of hydrazones, see: Khanmohammadi et al (2008); Luboch et al (2009). For related structures, see: Chantrapromma et al (2011); Fun, Jansrisewangwong et al (2011); Fun, Nilwanna et al (2011); Jansrisewangwong et al (2010); Nilwanna et al (2011).…”

Synthesis of a photoswitchable azobenzene-functionalized tris(indazol-1-yl) borate ligand and its ruthenium(II) cyclopentadienide complex

“…This protection was performed to avoid unwanted reactions of the phenolic protons during the subsequent steps of the synthesis, such as O-coordination to the boron atom during the tripode formation step but also the tautomeric equilibrium between the phenol and the quinone-hydrazone form. 21 An overall yield of 31% was obtained for these two steps. Reduction of the nitro functional group to amino failed using various conditions such as classical hydrogenation catalyzed with Pd/C, tin chloride in stoichiometric amount or tin(0) in acidic conditions.…”

Synthesis, thermal and light absorption properties of push-pull azochromophores substituted with dendronizing phenyl and perfluorophenyl fragments

“…Since it was known that aminophenol 5 forms azo compounds in diazotation and azo coupling reactions with hydroxycompounds in good yields [43][44][45][46][47] and reactions with 30 various dialkylanilines are also Scheme 1 . Synthesis of azochromophores 1, 2a-c and 3a-c. Ms -methanesulfonyl, DCC -N,N'- patented [48], one of the investigated pathways was done by the use of betaine 6.…”