2-(tert-butyldimethylsiloxy)-1,3-butadiene 、
methyl 3-isopropyl-7a-methyl-5-oxo-2,3-dihydro-7aH-pyrrolo<2,1-b>oxazole-6-carboxylate 以
neat (no solvent) 为溶剂,
反应 4.0h,
以95%的产率得到methyl (3S,5aR,9aR,9bR)-8-[tert-butyl(dimethyl)silyl]oxy-9b-methyl-5-oxo-3-propan-2-yl-3,6,9,9a-tetrahydro-2H-[1,3]oxazolo[2,3-a]isoindole-5a-carboxylate