title: [3 + 2] Cycloaddition reactions in the synthesis of triazolo[4,5-b]pyridin-5-ones and pyrrolo[3,4-b]pyridin-2-ones.
abstract: The reaction of 5-benzenesulfonyl-3,4-dihydro-1 H-pyridin-2-one derivatives with azides or isocyanides provided two new classes of compounds, triazolo[4,5-b]pyridin-5-ones 3 or pyrrolo[3,4-b]pyridin-2-ones 4, respectively, in good yields and regioselectivity. A representative set of 20 compound 3 and 12 compound 4 was prepared.
authors.affiliation: Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543.
authors.forename: Yongnian
authors.initials: Y
authors.lastname: Gao
authors.forename: Yulin
authors.initials: Y
authors.lastname: Lam
mesh_terms: D003500:Cyclization; D011728:Pyridones / Q000138:chemical synthesis* / Q000737:chemistry; D011758:Pyrroles / Q000737:chemistry*; D014230:Triazoles / Q000737:chemistry*
chemical_list: D011728:Pyridones; D011758:Pyrroles; D014230:Triazoles