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9-HC≡CCH₂Me₂N-<i>nido</i>-7,8-C₂B₉H₁₁, a previously described carboranyl terminal alkyne, was used for the copper(I)-catalyzed azide-alkyne cycloaddition with azido-3β-cholesterol to form a novel zwitter-ionic conjugate of <i>nido</i>-carborane with cholesterol, bearing a 1,2,3-triazol fragment. The conjugate of <i>nido</i>-carborane with cholesterol, containing a charge-compensated group in the linker, can be used as a precursor for the preparation of liposomes for BNCT (Boron Neutron Capture Therapy). The solid-state molecular structure of a <i>nido</i>-carborane derivative with the 9-Me₂N(CH₂)₂Me₂N-<i>nido</i>-7,8-C₂B₉H₁₁ terminal dimethylamino group was determined by single-crystal X-ray diffraction.