Abstract

Reactions of diazonium salts with 4-substituted phenylaminopent-3-en-2-ones produce the corresponding 4-phenylimino-3-phenylhydrazonopentan-2-ones. On the other hand, the reaction of diazonium salt with 4-amino(or 4-methylamino)pent-3-en-2-one gives a mixture of two isomers approaching the tautomeric form of 4-amino-3-phenylazopent-3-en-2-ones. The tautomeric form of the individual coupling products was determined by means of 13C and 15N NMR chemical shifts and J(15N,H) coupling constants. With the help of TPPI-NOESY spectra it was possible to follow the rate of mutual exchange of four protons of NH groups in both isomers of 4-amino-3-(4-methylphenylazo)pent-3-en-2-one. Copyright © 2000 John Wiley & Sons, Ltd.

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 call

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.