(1-氮杂双环[2.2.2]-3-辛基)-(4-甲氧基苄基)-胺 、
rac-(tert-butyl) 4,5-dihydro-4-methyl-5-oxo-2-phenyloxazole-4-propanoate 以
various solvent(s) 为溶剂,
反应 8.0h,
以42%的产率得到(R)-4-benzoylamino-4-<(S)-1-cyclohexylcarbamoyl-2-phenyl-ethylcarbamoyl>-pentanoic acid tert.-butyl ester