4-nitrobenzyl (4R,5S,6S)-3-[(diphenylphosphono)oxy]-6-[(R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate 、
(2S,4S)-4-mercapto-2-(N-methylpiperidin-4-yl)-N-(p-nitrobenzyloxycarbonyl)pyrrolidine hydrochloride 以the compound of Reference Example 38 and N,N-diisopropylethylamine (2.61 ml, 15 mmol) to obtain p-nitrobenzyl (1R,5S,6S)-6-[(R)-1-hydroxyethyl]-1-methyl-1-[(2S,4S)-2-(N-methylpiperidin-4-yl)pyrrolidin-4-yl-thio]-1-carbapen-2-em-3-carboxylate (3.74 g, yield: 79.5%)的产率得到N,N-二异丙基乙胺