5-cyclohex-1-enyl-3-(3-oxo-2-aza-spiro[4.5]dec-8-ylamino)-thiophene-2-carboxylic acid methyl ester 、
4-methylcyclohexanecarbonyl chloride 在
吡啶 作用下,
以
甲苯 为溶剂,
以18%的产率得到5-cyclohex-1-enyl-3-{(trans-4-methyl-cyclohexanecarbonyl)-[2-(trans-4-methyl-cyclohexanecarbonyl)-trans-3-oxo-2-aza-spiro[4.5]dec-8-yl]-amino}-thiophene-2-carboxylic acid methyl ester