Synthesis and X-ray analysis of a perfluoroalkyl-substituted azobenzene dye

Synthesis and characterisation of azobenzene-bridged cationic–cationic and neutral–cationic electrochromic materials

“…Azobenzene and its derivatives comprise a dominant class of synthetic colorants that demonstrate the advantages of bright colors, good stability, low flammability, and reversible photoisomerization [56,57]. Aromatic esters have been reported to display electrochromic properties through the formation of anionic radicals via electrochemical reduction [58][59][60][61][62].…”

Sustainable Synthesis of Balsalazide and Sulfasalazine Based on Diazotization with Low Concentrations of Nitrogen Dioxide in Air

“…[18][19][20] In this way,t he effectiveness of the denitrification-diazotization step can be evaluated in combination with as ubsequent azo coupling reaction, at which this two-step sequence is also of fundamental importance for the multi-ton scale productiono f ab road range of azo compounds used as dyes for textiles and many other purposes. [21,22] From ap harmaceutical point of view,t reatments with balsalazide (1), olsalazine (2)a nd sulfasalazine (3)r equires ignificant amountso ft hese compounds reaching maximum doses in the range of 2-6 grams/day for acute illnesses. [23] Through cleav-age in the intestine, all three compounds can act as pro-drugs for 5-aminosalicylic acid (5-ASA, mesalazine), which is active against inflammatory bowel disease including ulcerative colitis and Crohn's disease.…”