tert-butyl 4-((3S)-3-azido-4-phenyl-2-(2-phenylacetoxy)butanamido)piperidine-1-carboxylate 在
polymer supported triphenylphosphine 作用下,
以
二氯甲烷 为溶剂,
以96%的产率得到tert-butyl 4-[[(4S)-2,4-dibenzyl-4,5-dihydro-1,3-oxazole-5-carbonyl]amino]piperidine-1-carboxylate