(6R,7R)-tert-butyl-7-(2-(9-nitro-6,11-dihydro-5H-benzo[a]carbazol-3-yloxy)acetamido)-3-(acetoxymethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 在
苯甲醚 、
三氟乙酸 作用下,
以
二氯甲烷 为溶剂,
以40%的产率得到(6R,7R)-3-(acetyloxymethyl)-7-[[2-[(9-nitro-6,11-dihydro-5H-benzo[a]carbazol-3-yl)oxy]acetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid