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2005
Cycloalkylphenyl derivatives
Q 0760
Stereoselective Preparation of Spiran-Bridged, Sandwiched Bisarenes. — The
of dioxospirans (III), (V), and (XVI) is presented. The former is prepared by
34- 126 synthesis
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
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