Synthesis and Conformation of Some Dioxaspiranes with Bicyclo [2.2.2]octane System By condensation of 7,7‐bis‐(bromomethyl)‐2,3,5,6‐dibenzo‐bicyclo[2.2.2]octane with different diols, three new “bridge‐spiranes” 1, 2 and 3 were obtained. On the basis of 1H‐n.m.r. spectra and the respective topic relations of the hydrogen atoms the dominant conformations of heterocyclic rings in these compounds have been assigned.

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Propellanes. Part 11. Synthesis of Dioxa(4.3.3)propellanes from Vicinal Tetrakis(hydroxymethyl)cycloalkanes -(synthesis, structure and conformation of the new (4.3.3)propellanes ( V) and (VIII)). -(JAMROZIK, J.; JAMROZIK, M.; SCIBOROWICZ, P.; ZESLAWSKI, W.; Monatsh. Chem. 126 (1995) 5, 587-591; Inst. Chem., Jagellonische Univ., PL-30-060 Krakow, Pol.; DE)

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