丙二酸环(亚)异丙酯 、 benzyl (3aR,5R,7R,7aS)-7-hydroxy-2-phenyl-5-phenylmethoxy-4,6,7,7a-tetrahydro-3aH-1,3-benzodioxole-5-carboxylate 以
甲苯 为溶剂,
反应 3.5h,
以92%的产率得到3-[[(3aR,4R,6S,7aR)-2-phenyl-6-phenylmethoxy-6-phenylmethoxycarbonyl-4,5,7,7a-tetrahydro-3aH-1,3-benzodioxol-4-yl]oxy]-3-oxopropanoic acid