Synthesis and Reactions of Fluorous Carbobenzyloxy (FCbz) Derivatives of α-Amino Acids

Abstract
Fluorous carbobenzyloxy (FCbz) reagents RfCH2CH2C6H4CH2OC(O)OSu (where Su is succinimidoyl and Rf is C6F13 and C8F17) have been used to make FCbz derivatives of 18 of the 20 natural amino acids. The potential utility of this new family of reagents in both standard fluorous synthesis with spe separation and fluorous quasiracemic synthesis is illustrated with representative reactions of the FCbz-Phe derivatives.