(E)-1-(1-methyl-1H-imidazol-2-yl)but-2-en-1-one 、
Benzoic acid, 4-[(Z)-[oxido(phenylmethyl)imino]methyl]-, methyl ester 在
chiral bis(oxazolinyl)pyridine-cerium(IV) triflate 4 A molecular sieve 作用下,
以
乙酸乙酯 为溶剂,
反应 36.0h,
以95%的产率得到methyl 4-((3R,4S,5R)-2-benzyl-5-methyl-4-(1-methyl-1H-imidazole-2-carbonyl)isoxazolidin-3-yl)benzoate