1-(((4-nitrophenoxy)carbonyl)oxy)ethyl pivalate 在
N,N-二异丙基乙胺 作用下,
以
乙腈 为溶剂,
反应 2.0h,
生成 (4R,5S,6S)-3-((2R,3R)-2-{[1-(2,2-dimethyl-propionyloxy)ethoxycarbonylamino]-methyl}-tetrahydrofuran-3-yl-sulfanyl)-6-(1R-hydroxyethyl)-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitrophenylmethyl ester