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2005 Cycloalkylphenyl derivatives Q 0760 Stereoselective Preparation of Spiran-Bridged, Sandwiched Bisarenes. -The synthesis of dioxospirans (III), (V), and (XVI) is presented. The former is prepared by a new synthetic route. The products are transformed into vinyl triflates which smoothly undergo Pd-catalyzed cross-coupling under Stille, Suzuki, or Negishi conditions to afford the title compounds. Hydrogenation of the unsaturated molecules proceeds with high stereoselectivity. -(ROLANDSGARD, M.; BALDAWI, S.; SIRBU, D.; BJOERNSTAD, V.; ROEMMING, C.; UNDHEIM*, K.; Tetrahedron 61 (2005) 16, 4129-4140; Dep. Chem., Univ. Oslo, N-0315 Oslo, Norway; Eng.) -Jannicke 34-126

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1992 magnetic resonance, nuclear quadrupole resonance magnetic resonance, nuclear quadrupole resonance (organic substances) K 2560 -043Long-Range NMR Coupling Between a Cyclopropyl Proton and a Proton Next to the Ring in a Number of 2,2-Disubstituted 1,1-Dihalocyclopropanes -(analysis of the 1H NMR spectra of 15 compounds of type (I)). -(SYDNES, L. K.; PETTERSEN, A.; DRABLOES, F.; ROEMMING, C.; Acta Chem. Scand. 45 (1991) 9, 902-913; Dep. Chem., Univ. Tromsoe, N-9001 Tromsoe, Norway; EN)