title: Pericyclic reaction of ketenes with cascade reaction products of pyridine N-oxides and dipolarophiles. X-ray structures of the adducts and formation mechanism.
abstract: The structures of the adducts derived from the reactions of substituted ketenes with dihydropyridine derivatives have been clarified by single crystal X-ray analyses and the formation mechanism is discussed on the basis of the reaction-path calculations by semiempirical and density functional theory (DFT) molecular orbital methods.
authors.affiliation: Graduate School of Pharmaceutical Sciences, Kumamoto University, Japan.
authors.forename: Shigeru
authors.initials: S
authors.lastname: Oiso
authors.forename: Masashi
authors.initials: M
authors.lastname: Eto
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Yoshitake
authors.forename: Kazunobu
authors.initials: K
authors.lastname: Harano
mesh_terms: D018360:Crystallography, X-Ray; D003500:Cyclization; D005030:Ethylenes / Q000737:chemistry*; D007659:Ketones / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D008968:Molecular Conformation; D011725:Pyridines / Q000737:chemistry*; D013055:Spectrophotometry, Infrared
chemical_list: D005030:Ethylenes; D007659:Ketones; D011725:Pyridines; C008223:ketene