methyl (3S,5aR,9aR,9bR)-7,8,9b-trimethyl-5-oxo-3-propan-2-yl-3,6,9,9a-tetrahydro-2H-[1,3]oxazolo[2,3-a]isoindole-5a-carboxylate 在
sodium tetrahydroborate 作用下,
以94%的产率得到(3S,5aS,9aR,9bR)-5a-Hydroxymethyl-3-isopropyl-7,8,9b-trimethyl-2,3,6,9,9a,9b-hexahydro-5aH-oxazolo[2,3-a]isoindol-5-one