The first octasilacu bane, octakis-(t-butyldimethylsilyl)pentacyclo[4.2.O.O~~~.O~~*.O~~~]octasilane, was synthesised in one step by condensation of 2,2,3,3-tetrabromo-1,4-di-t-butyl-l ,I ,4,4-tetramethyltetrasilane or 1 ,I ,I -tribromo-2-t-butyl-2,2-dimethyldisilane with sodium in toluene.

Oxidation of levoglucosenone (I) with m‐chloroperbenzoic acid in dichloromethane yields a mixture of the formyloxymethylbutenolide (II) and the carbonate (III).

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The coupling reaction of the sodium salt of adenine, which could be easily prepared by deprotonation with sodium hydroxide or sodium methoxide, with 1-α-chloro-2-deoxyribose derivative proceeded in a good stereospecific manner in acetone as a solvent to give the β-anomer of the corresponding acylated adenosine.