Es wird eine allgemeine präparative Methode zur Herstellung phosphorylierter Formale mit drei‐ und fünffach koordiniertem Phosphor vorgestellt, die in der Reaktion von Estern und anderen P(III)‐Säurederivaten mit Orthoameisensäureestern besteht.
Abstract.A ballean is a set endowed with some family of balls in such a way that a ballean can be considered as an asymptotic counterpart of a uniform topological space. We characterize the ideal generated by the family of all thin subsets in an ordinal ballean, and apply this characterization to metric spaces and groups.2000 AMS Classification: 54A25, 54E25, 05A18.
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