Abstract
A high‐yield, atom‐efficient, and green protocol for the synthesis of novel pyrazolo‐fused benzophenazines utilizing a multicomponent condensation reaction between 2‐hydroxynaphthalene‐1,4‐dione, o‐phenylenediamine, aromatic aldehydes, and 4‐methylbenzenesulfonohydrazide in the presence of phosphotungstic acid (H3PW12O40) under microwave irradiation (MWI) in EtOH is reported. We provide a novel series of 1H‐benzo[a]pyrazolo[3,4‐c]phenazine derivatives interesting for biological screening tests. This protocol offers several advantages satisfying many principles of green chemistry, including atom economy, energy saving, clean reactions, inexpensive reagents, reusability of H3PW12O40, the absence of any tedious work‐up or purification, and avoidance of hazardous or toxic reagents/catalysts/solvents.
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 callDisclaimer: 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.
