‘Click’ synthesis of cobalt bis(dicarbollide)–cholesterol conjugates

New conjugates of cholesterol and cobalt bis(dicarbollide) were synthesized using ‘click’ cycloaddition of 3b-(2-azidoethyl) cholest-5-ene and acetylene-equipped cobalt bis(dicarbollides). The synthesized boronated cholesterols can be of interest for liposomal drug delivery for boron neutron capture therapy of cancer.