(E)-2-(5-Cyclohexylisoxazol-3-yl)-2-oxo-N-(3,4,5-trichlorophenyl)acetohydrazonoyl cyanide  

a yellow solid  96%HNMR/HpLC  

Ethyl 5-cyclohexylisoxazole-3-carboxylate (3)  

a colorless oil    95%min by HNMR/HpLC

N-cyclopentyl-4-nitrobenzenesulfonamide (3) a white solid  95%min by HNMR/HpLC

4-Amino-N-cyclopentylbenzenesulfonamide (4) a white solid  95%min by HNMR/HpLC