4-[[3-Cyclohexyl-5-ethoxy-2,3-dihydro-2-oxo-1H-benzimidazol-1-yl]methyl]-3-methoxybenzoic acid 、
叔戊基胺 在
(benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran 为溶剂,
生成 3-cyclohexyl-5-ethoxy-1,3-dihydro-1-[2-methoxy-4-[N-(1,1-dimethylpropyl)carbamoyl]benzyl]-2H-benzimidazol-2-one