Abstract
AbstractThe synthesis of hitherto unreported pentacyclic‐dione derivatives having three heteroatoms in the ring is reported from 4‐hydroxythiocoumarins and aryl (hetero)/alkyl aldehydes under solvent‐ and catalyst‐free conditions through pseudo‐three‐component reaction. The reaction proceeds through Knoevenagel condensation of 4‐hydroxythiocoumarin with aldehyde followed by Michael addition with another molecule of 4‐hydroxythiocoumarin with the elimination of hydrogen sulfide to furnish the final product. The salient features of this protocol are mild reaction conditions, good yield, broad substrate scope, no need for catalyst or solvent or chromatographic separation, and high atom economy.
Sign-in/Register to access full text options 
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.
