2-(2-methyl-2-propenyl)-4H-oxazol-5-one 、
(2S,3R,4S)-3,4-dibenzyloxy-2-(t-butyldimethylsiloxy)methyl-5-methoxy-3,4-dihydro-2H-pyrrole 以
氯仿 为溶剂,
以2.7%的产率得到4-[(3R,4R,5S)-3,4-dibenzyloxy-5-(t-butyldimethylsiloxymethyl)pyrrolidin-2-ylidene]-2-(2-methyl-propen-1-yl)-4H-oxazol-5-one