allyl (3R)-3-(chloroacetyl)pyrrolidine-1-carboxylate 在
sodium hydride 作用下,
生成 allyl (4R,5S,6S)-3-[(4-{(3R)-1-[(allyloxy)carbonyl]pyrrolidin-3-yl}-1,3-thiazol-2-yl)thio]-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate