(+/-)-ethyl 2-(N-ethyl-N-(2-aminosulfonyl-3a,4,5,6,7,7a-hexahydrobenzo[b]thiophen-4-yl)amino)-2-oxoacetate 在
sodium hydroxide 、 potassium phosphate buffer 、
streptogrisin A 作用下,
以
乙腈 为溶剂,
以50%的产率得到(S)-ethyl 2-(N-ethyl-N-(2-aminosulfonyl-3a,4,5,6,7,7a-hexahydrobenzo[b]thiophen-4-yl)amino)-2-oxoacetate