title: A one-pot entry to a novel 3-H-benzo[d]pyrazolo[1,5-b]isothiazole ring system.
abstract: The phosphorus ylide obtained from the reaction between 2-aminobenzo[d]isothiazol-3-one and dimethyl acetylenedicarboxylate in the presence of triphenylphosphine undergoes a smooth intramolecular Wittig-type reaction to produce, in a one-pot reaction, 3-H-benzo[d]pyrazolo[1,5-b]isothiazole-2,3a-dicarboxylic acid dimethyl ester, a novel functionalized heterocyclic compound.
authors.affiliation: Dipartimento Farmaceutico, Università degli Studi di Parma, Parco Area delle Scienze 27/A, 43100, Parma, Italy. paola.vicini@unipr.it
authors.forename: Paola
authors.initials: P
authors.lastname: Vicini
authors.forename: Matteo
authors.initials: M
authors.lastname: Incerti
authors.forename: Rocco
authors.initials: R
authors.lastname: Ferretti
authors.forename: Franca
authors.initials: F
authors.lastname: Zanardi
mesh_terms: D000114:Acetylene / Q000031:analogs & derivatives* / Q000737:chemistry; D000480:Alkynes; D006571:Heterocyclic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D009943:Organophosphorus Compounds / Q000737:chemistry*; D013844:Thiazoles / Q000737:chemistry*
chemical_list: D000480:Alkynes; D006571:Heterocyclic Compounds; D009943:Organophosphorus Compounds; D013844:Thiazoles; C061896:triphenylphosphine; C022918:acetylenedicarboxylic acid dimethyl ester; D000114:Acetylene