3-(8-amino-1,4-dihydro-1-phenyl-[1]-benzothiopyrano[4,3-c]pyrazol-3-yl)-2-cyano-3-oxo-N-phenyl-propanamide 、
丁二酸酐 在
水 、
chloroform methanol 作用下,
以
四氢呋喃 、 ice water 为溶剂,
反应 3.0h,
以yields 0.9 g of 3-[8-(3-carboxy-propanoylamino)-1,4-dihydro-1-phenyl-[1]-benzothiopyrano[4,3-c]pyrazol-3-yl]-2-cyano-3-oxo-N-phenylpropanamide, m.p. 230°-233° C.的产率得到3-[8-(3-carboxy-propanoylamino)-1,4-dihydro-1-phenyl-[1]-benzothiopyrano[4,3-c]pyrazol-3-yl]-2-cyano-3-oxo-N-phenylpropanamide