A series of new N-pyrazoyl-benzimidazoles 4 have been synthesized through a two-steps reaction using 5,2-aminophenylamino-3-(2-hydroxyphenyl)-1H-pyrazole 2 as a useful precursor. All prepared compounds have been fully characterized by mass spectrometry, 1H, 13C and 2D NMR techniques.
S. Hammami, A. Romdhane, R. Gharbi, B. Trimèche, M.A. Hamza, Z. Mighri
1H-pyrazole, condensation reaction, N-pyrazoyl-benzimidazoles