Synthesis, properties, and molecular structure of nitro-substituted N-methyl-N-nitroanilines
摘要:
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 N-7-N-8 bond is shortened, and the N-8 atom is characterized by a strong deficit of electron density. ne dihedral angle between the planes of the N-nitroamino group and the benzene ring is 56 degrees-92 degrees, 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.
1,3-Dinitrobenzene (1a) and some simple monosubstituted derivatives (1b–g) were aminated with a liquidmethylamine solution of potassiumpermanganate (LMA/PP) to give the corresponding mono- and bis(methylamino)-substituted compounds (3a-e and 4a). 1,2-Dinitrobenzene (1i) was aminated with LMA/PP to give 2-(methylamino)-1-nitrobenzene (3f) in high yield. The intermediacy of 4-(methylamino) σ-adducts
Design and Synthesis of Benzimidazoles As Novel Corticotropin-Releasing Factor 1 Receptor Antagonists
作者:Michiyo Mochizuki、Masakuni Kori、Katsumi Kobayashi、Takahiko Yano、Yuu Sako、Maiko Tanaka、Naoyuki Kanzaki、Albert C. Gyorkos、Christopher P. Corrette、Suk Young Cho、Scott A. Pratt、Kazuyoshi Aso
DOI:10.1021/acs.jmedchem.5b01715
日期:2016.3.24
with a flexible aryl group bonded through a one-atom linker as a new scaffold for a corticotropin-releasing factor 1 (CRF1) receptorantagonist were designed, synthesized, and evaluated. We expected that structural diversity could be expanded beyond that of reported CRF1 receptorantagonists. In a structure–activity relationship study, 4-chloro-N2-(4-chloro-2-methoxy-6-methylphenyl)-1-methyl-N7,N7
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.
twisted vs. the aromatic ring, there is no conjugation between the nitro and nitramino groups across the ring. The nitramino group is an electron withdrawing substituent due to the inductive effect. The number and positions of the Ar-nitro groups have no influence on the N-nitro group. Its migration ability cannot be explained in terms of the interaction between the migration origin and the ring substituents
摘要 采用光谱和电光方法制备并研究了N-甲基-N-苯基硝胺的10种单、二和三硝基衍生物。其中三个,即。N-(2, 5-dinitrophenyl)-N-methylnitramine (monoclinic, P21/c, a=8.248(2), b=11.655(2), c=10.404(2) A, β=102.57(2)°) , N-(2,3-二硝基苯基)-N-甲基硝胺 (单斜, P21/c, a=9.224(2), b=7.222(2), c=15.458(4) A, β=101.08(2)° )) 和 N-(3,5-二硝基苯基)-N-甲基硝胺 (单斜, P21/n, a=9.814(2), b=12.000(2), c=8.865(2) A, β=114.94(2) )°) 通过 X 射线衍射法进行检测。硝基氨基几乎是平面的,具有短的 N(7)-N(8) 键和强烈缺电子的 N(8)
TRICYCLIC INHIBITORS OF PRO-MATRIX METALLOPROTEINASE ACTIVATION
申请人:WANG Aihua
公开号:US20120129811A1
公开(公告)日:2012-05-24
This invention relates to tricycle I and its therapeutic and prophylactic uses, wherein the variables C
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