Showing papers by "Leo A. Paquette published in 1990"

Tandem anionic [3,3] sigmatropy and SN' displacement. New synthetic technology for the construction of hydroazulenone and related frameworks

Abstract: La condensation des derives de (7,7-dimethylnorcar-2-en-3-yl trimethyl)stannane avec le 2-chlorocyclohexanone donne des derives de (2-[7,7−dimethylnorcar-2-en-3-yl]-1-vinyl)cyclohexanol. Ces derives subissent ensuite differentes transpositions chimiques. On obtient des derives de tricyclopentadecene et de tetracyclopentadecene

Quantitation of proximity effects on rate. A case study involving dyotropic hydrogen migration within syn-sesquinorbornene disulfones carrying central substituents having different spatial demands

Abstract: La double liaison centrale du syn-sesquinorbornadiene, produit par la reaction de Diels Alder du (Z)-bis (benzenesulfonyl)-1,2 ethylene avec le trichloro [5.2.1.0 2,6 ] decatriene-2,5,8, est reduite regiospecifiquement avec le diimide. D'autres reactions permettent la fusion avec des sous-unites: oxiranne, aziridine, cyclopropane et methylocyclopropane, dans la region centrale de cette molecule. Tout ces produits subissent la transposition dyotropique etudiee

[4.4.4]Propellahexaene by triple Shapiro degradation. Structural and electronic properties of this maximally unsaturated hydrocarbon and consequences of O-methylation of its [4.4.4]propellatrienetrione precursors

Abstract: The structural and spectroscopic features of 5 are critically defined, the thermal stabilities of the hexaene and two trimethoxy derivatives are compared, and the Diels-Alder reactivities of 5 and related molecules are surveyed. (5: [4.4.4] Propellahexaene)

Quantitation of Proximity Effects on Rate. A Case Study Involving Dyotropic Hydrogen Migration Within syn-Sesquinorbornene Disulfones Carrying Central Substituents Having Different Spatial Demands.

Abstract: La double liaison centrale du syn-sesquinorbornadiene, produit par la reaction de Diels Alder du (Z)-bis (benzenesulfonyl)-1,2 ethylene avec le trichloro [5.2.1.0 2,6 ] decatriene-2,5,8, est reduite regiospecifiquement avec le diimide. D'autres reactions permettent la fusion avec des sous-unites: oxiranne, aziridine, cyclopropane et methylocyclopropane, dans la region centrale de cette molecule. Tout ces produits subissent la transposition dyotropique etudiee

(4.4.4)Propellahexaene by Triple Shapiro Degradation. Structural and Electronic Properties of This Maximally Unsaturated Hydrocarbon and Consequences of O-Methylation of Its (4.4.4)Propellatrienetrione Precursors.

Abstract: The structural and spectroscopic features of 5 are critically defined, the thermal stabilities of the hexaene and two trimethoxy derivatives are compared, and the Diels-Alder reactivities of 5 and related molecules are surveyed. (5: [4.4.4] Propellahexaene)