ethyl (1S,5S,6S)-ethyl 2-(2,4-dimethoxybenzyl)-5-methyl-3-oxo-2-azabicyclo[4.1.0]heptane-7-carboxylate 在
劳森试剂 作用下,
以
苯 为溶剂,
反应 2.0h,
以58%的产率得到ethyl (1S,5S,6S,7S)-ethyl 2-(2,4-dimethoxybenzyl)-5-methyl-3-thioxo-2-azabicyclo[4.1.0]heptane-7-carboxylate