6-(4-[1,3]Dioxolan-2-yl-4-methyl-2-oxovaleroylamino)-4-methyl-2,3-benzoxazin-1-one 、
苄基氯化镁 以
四氢呋喃 为溶剂,
以After column chromatography, 390 mg of product were obtained的产率得到rac-6-[2-benzyl-4-[1,3]dioxolan-2-yl-2-hydroxy-4-methylvaleroylamino]-4-methyl-2,3-benzoxazin-1-one