Abstract
Oxidative Coupling of 5‐Aminopyrazoles with p‐PhenylenediaminesBy oxidative coupling of 5‐amino‐3‐methyl‐1‐phenyl‐pyrazole 4 with N,N‐diethyl‐p‐phenylenediamine the 4‐(4‐N,N‐diethylamino‐phenylimino)‐3‐methyl‐1‐phenyl‐2‐pyrazolin‐5‐imin 5 is formed. 5 is oxidized very easily to the 1H‐pyrazolo[3,4‐b]quinoxaline 6a. The Z/E‐isomerism of the azomethine dye is investigated by dynamic n.m.r.‐spectroscopy. 1H‐Pyrazolo[3,4‐b]quinoxalines (6a–d) are also formed by reaction of 1,3‐disubstituted 5‐aminopyrazoles with p‐nitroso‐dialkylanilines.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callSimilar Papers
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
