ChemInform Abstract: ISOMERISIERUNG VON P‐CARBORANEN UEBER DIANIONEN ZU O‐STRUKTUREN

Abstract

Läßt man auf 1‐Methyl‐12‐chlor‐p‐carboran (I) (1 Mol) Natrium (2 Mol) in flüssigem Ammoniak einwirken, dann erhält man nach Oxidation ein Gemisch der unter Aangegebenen Carborane.

Synthesis and Characterization of 3-Chloropropyl-substituted o- Carboranes: Crystal Structures of 1,2-(1,3-Propanediyl)-o-carborane, 1-(3-Chloropropyl)-o-carborane and 1,2-Bis(3-chloropropyl)-ocarborane

“…However, it may be possible to take advantage of such difference in reactivity with halogen atoms in these reactions. For instance, the reactions of (LiC)(CMe) [12] or K 2 C 2 B 10 H 10 [13] with 1,3-dibromopropane, of 1-iodo-2-(3-bromopropyl)-o-carborane with magnesium [14], as well as of 1-(3-iodopropyl)-o-carborane with the lithium salt of imidazolidinone [15], afford the exo-polyhedrally cyclized compound 1,2-(1,3-propanediyl)-o-carborane (2), which is a useful starting material for the synthesis of metallacarboranes [11] and novel 13-vertex carborane clusters [16]. We proposed that by the reaction of Li 2 C 2 B 10 H 10 with 1-bromo-3-chloropropane ( ClCH 2 CH 2 CH 2 Br) under suitable conditions, it might be possible to obtain in one step the 3-chloropropyl-substitued o-carborane derivative(s), which should be useful for further transformations.…”