(4R)-3-[(2S,4R)-4-benzyl-2-[tert-butyl(dimethyl)silyl]oxy-5-[[(3S,4S)-3-hydroxy-3,4-dihydro-2H-chromen-4-yl]amino]-5-oxopentanoyl]-N-[(3,5-dimethyl-1,2-oxazol-4-yl)methyl]-5,5-dimethyl-1,3-thiazolidine-4-carboxamide 在
四丁基氟化铵 作用下,
以
四氢呋喃 为溶剂,
以95%的产率得到(R)-3-[(2S,4R)-2-Hydroxy-4-((3S,4S)-3-hydroxy-chroman-4-ylcarbamoyl)-5-phenyl-pentanoyl]-5,5-dimethyl-thiazolidine-4-carboxylic acid (3,5-dimethyl-isoxazol-4-ylmethyl)-amide