5910-19-0Relevant articles and documents
Design and Synthesis of Benzimidazoles As Novel Corticotropin-Releasing Factor 1 Receptor Antagonists
Mochizuki, Michiyo,Kori, Masakuni,Kobayashi, Katsumi,Yano, Takahiko,Sako, Yuu,Tanaka, Maiko,Kanzaki, Naoyuki,Gyorkos, Albert C.,Corrette, Christopher P.,Cho, Suk Young,Pratt, Scott A.,Aso, Kazuyoshi
, p. 2551 - 2566 (2016/04/10)
Benzazole derivatives with a flexible aryl group bonded through a one-atom linker as a new scaffold for a corticotropin-releasing factor 1 (CRF1) receptor antagonist were designed, synthesized, and evaluated. We expected that structural diversity could be expanded beyond that of reported CRF1 receptor antagonists. In a structure-activity relationship study, 4-chloro-N2-(4-chloro-2-methoxy-6-methylphenyl)-1-methyl-N7,N7-dipropyl-1H-benzimidazole-2,7-diamine 29g had the most potent binding activity against a human CRF1 receptor and the antagonistic activity (IC50 = 9.5 and 88 nM, respectively) without concerns regarding cytotoxicity at 30 μM. Potent CRF1 receptor-binding activity in brain in an ex vivo test and suppression of stress-induced activation of the hypothalamus-pituitary-adrenocortical (HPA) axis were also observed at 138 μmol/kg of compound 29g after oral administration in mice. Thus, the newly designed benzimidazole 29g showed in vivo CRF1 receptor antagonistic activity and good brain penetration, indicating that it is a promising lead for CRF1 receptor antagonist drug discovery research.
Synthesis, properties, and molecular structure of nitro-substituted N-methyl-N-nitroanilines
Prezhdo,Bykova,Prezhdo,Daszkiewicz,Kyziol,Zaleski
, p. 64 - 75 (2007/10/03)
Ten mono-, di-, and trinitro derivatives of N-methyl-N-nitroaniline were synthesized and studied by spectral, electrooptical, and quantum-chemical methods. Three of these derivatives, N-methyl-N,2,3-trinitroaniline, N-methyl-N,2,5-trinitroaniline, N-methyl-N,3,5-trinitroaniline, were also examined by the X-ray diffraction method. The N-nitroamino group in their molecules is almost planar, the N7-N8 bond is shortened, and the N8 atom is characterized by a strong deficit of electron density. The dihedral angle between the planes of the N-nitroamino group and the benzene ring is 56°-92°, which makes conjugation between these fragments impossible. The N-nitroamino group in the examined compounds acts as a weak electron donor with respect to the nitro groups in the aromatic ring; the mechanism of this effect is inductive. Pleiades Publishing, Inc. 2006.
Construction of interconnected acidity functions based on ortho substituted anilines and N-methylanilines as indicators
Pytela, Oldrich,Kulhanek, Jiri,Jiraskova, Eva,Nevecna, Tatjana
, p. 1638 - 1658 (2007/10/03)
The log I values of 15 mainly ortho substituted derivatives of aniline and N-methylaniline have been measured spectrophotometrically in sulfuric, perchloric, and methanesulfonic acids. A new algorithm has been suggested for construction of acidity functions enabling simultaneous and independent construction of acidity functions in various media under the condition of equal values of pKa of the same indicators in the given media. The so-called interconnected acidity functions have been constructed with using this algorithm and the log I values measured in the above media, and the pKa values have been calculated. The resulting acidity functions and pKa values agree well with the corresponding literature data.
