N-(Benzyloxycarbonyl)-L-tryptophan p-Nitrophenyl Ester is used in the synthesis of tryptophan containing dipeptides as potent PPARy antagonists.. N-(Benzyloxycarbonyl)-L-tryptophan p-Nitrophenyl Ester has also been shown to self-assemble on the surface of monolayer protected gold nanoparticles to form a catalytic system for transesterification reactions.