{3-[4-(4-Chloro-phenyl)-4,5-dihydro-1H-pyrazole-3-carbonyl]-phenyl}-[4-(4-chloro-phenyl)-4,5-dihydro-1H-pyrazol-3-yl]-methanone 在
盐酸 、 sodium nitrite 作用下,
以63%的产率得到{3-[4-(4-Chloro-phenyl)-1-nitroso-4,5-dihydro-1H-pyrazole-3-carbonyl]-phenyl}-[4-(4-chloro-phenyl)-1-nitroso-4,5-dihydro-1H-pyrazol-3-yl]-methanone