ortho-Carbaborane (1,2-closo-C2B10H12) was asymmetrically functionalised with a deoxy-galactosyl and carboxyl ethyl moiety.
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The key intermediate Deoxygalactose-functionalised ortho-carbaborane was synthesised by two independent synthetic routes in similar yield.
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The direct synthesis of the key intermediate gave comparable (or better) yield than the recommended silyl protection.
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The carboxyl group was formed under mild conditions employing ruthenium catalysts and periodate as a gentle oxidant.
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