A Convenient Preparation of an Orthogonally Protected Cα,Cα-Disubstituted Amino Acid Analog of Lysine: 1-tert-butyloxycarbonyl-4-((9-fluorenylmethyloxycarbonyl)amino)-piperidine-4-carboxylic Acid

DMAP(4-Dimethylamino)pyridine 1-tert-Butoxycarbonylpiperidine-4-spiro-5′-(1′,3′-bis(tert-butoxycarbonyl)hydantoin 4-Amino1-tert-butoxycarbonylpiperidine-4-carboxylic acid 1-tert-Butyloxycarbonyl-4-(9-fluorenylmethyloxyamino)piperidine-4-carboxylic acid 9-Fluorenylmethyl chlorformate 4-Piperidone monohydrate hydrochloride Piperidine-4-spiro-5′-hydantoin