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Yaghoub Sarrafi

Yaghoub Sarrafi

Academic rank: Professor
ORCID:
Education: PhD.
ScopusId:
Faculty: Faculty of Chemistry
Address:
Phone: 9121978350

Research

Title
Synthesis of Functionalized Pyrrolizidines/Pyrrolidines Incorporating a Spirooxindole Motif through [3+2] Cycloaddition
Type
JournalPaper
Keywords
2-(aryloxy)fumarates - 2-(alkyl- or arylthio)fumarates - azomethine ylides - spiro compounds - pyrrolizidines - pyrrolidines - DFT calculations
Year
2013
Journal SYNTHESE
DOI
Researchers Yaghoub Sarrafi ، Marzieh Sadatshahabi ، Mahshid Hamzehloueian ، Kamal Alimohammadi ، Mahgol Tajbakhsh

Abstract

Dimethyl 2-(aryloxy)fumarates and dimethyl 2-(alkyl- or arylthio)fumarates are shown to be efficient dipolarophiles in 1,3-dipolar cycloaddition reaction with azomethine ylides, which are generated by the reaction of isatin with the secondary amino ­acids proline or sarcosine. In these reactions, dimethyl 2-(alkyl- or arylthio)fumarates afforded spirooxindolopyrrolizidines or -pyrrolidines in high yields with excellent regioselectivities, while dimethyl 2-(aryloxy)fumarates produced mixtures of regioisomers. DFT calculations at the B3LYP/6-31G(d,p) level were consistent with the observed results. Tri- and tetracyclic compounds were obtained through regio- and stereoselective intramolecular cycloaddition of O-vinylic salicylaldehyde with secondary amino acids