2-吡啶甲酸 、
[6S/R,9R/S,11R/S]-2',3',4',5,5',6,7,8,9,10-decahydro-2-hydrazido-5'-(2,2,2-trifluoroethyl)-spiro[6,9-methanobenzocyclooctene-11,3'-(1,2,5)thiadiazole]-1',1'-dioxide 在
O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
乙腈 为溶剂,
以60%的产率得到[6S/R,9R/S,11R/S]-2',3',4',5,5',6,7,8,9,10-decahydro-2-(carboxylic acid-N'-2-pyridinecarnonyl-hydrazido)-5'-(2,2,2-trifluoroethyl)-spiro[6,9-methanobenzocyclooctene-11,3'-(1,2,5)thiadiazole]-1',1'-dioxide