title: Reaction of Huisgen zwitterion with 1,2-benzoquinones and isatins: expeditious synthesis of dihydro-1,2,3-benzoxadiazoles and spirooxadiazolines.
abstract: [reaction: see text] The zwitterionic intermediate generated from dialkyl azodicarboxylate and triphenylphosphine on reaction with 3-methoxy-1,2-benzoquinones afforded dihydro-1,2,3-benzoxadiazoles. N-Substituted isatins furnished spirooxadiazolines under similar conditions.
authors.affiliation: Organic Chemistry Section, Chemical Sciences Division, Regional Research Laboratory (CSIR), Trivandrum 695 019, India. vijaynair_2001@yahoo.com
authors.forename: Vijay
authors.initials: V
authors.lastname: Nair
authors.forename: A T
authors.initials: AT
authors.lastname: Biju
authors.forename: A U
authors.initials: AU
authors.lastname: Vinod
authors.forename: Eringathodi
authors.initials: E
authors.lastname: Suresh
mesh_terms: D016227:Benzoquinones / Q000737:chemistry*; D020650:Combinatorial Chemistry Techniques; D018360:Crystallography, X-Ray; D007510:Isatin / Q000737:chemistry*; D008968:Molecular Conformation; D015394:Molecular Structure; D010069:Oxadiazoles / Q000138:chemical synthesis* / Q000737:chemistry; D013141:Spiro Compounds / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D016227:Benzoquinones; D010069:Oxadiazoles; D013141:Spiro Compounds; D007510:Isatin