Synthesis of an enantiopure fluorous 1,2-diphenyl-1,2-diaminoethane

Enantiopure fluorous 1,2-diphenyl-1,2-ethanediamine bearing four fluorous ponytails and having 62.2% fluorine content has been prepared. Resolution of racemic 1,2-bis(3,5-dimethoxyphenyl)ethane-1,2-diamine with (-)-menthyl chloroformate followed by reduction of the obtained carbamate afforded the corresponding enantiopure secondary diamines. Protection of the amino function as an aminal, followed by the cleavage of the methoxy moiety and then the introduction of the four fluorous ponytails gave after hydrolysis the enantiopure fluorous 1,2-diphenyl-1,2-ethanediamine.