NITROGEN HETEROCYCLE DERIVATIVES, PREPARATION THEREOF AND APPLICATION THEREOF IN HUMAN THERAPEUTICS
申请人:Leroy Isabelle
公开号:US20130040928A1
公开(公告)日:2013-02-14
The present invention relates to compounds having general formula I characterised in that
wherein in particular:
R
1
represents one or a plurality of groups such as: trifluoromethyl, halogen such as F, Cl, Br, methyl, nitro.
R represents nitrogen
T-U represents C═C, V represents N, W represents C═O, R
2
represents Cl or H, R
3
=H and R
4
=Me,
A represents
wherein n=m=1, X represents —CH
2
— and E represents —CH—, and D represents oxygen,
along with the various isomers and mixtures thereof in any proportions, and the pharmaceutically acceptable salts thereof.
The Balance between Hydrogen Bonds, Halogen Bonds, and Chalcogen Bonds in the Crystal Structures of a Series of 1,3,4-Chalcogenadiazoles
作者:Viraj De Silva、Boris B. Averkiev、Abhijeet S. Sinha、Christer B. Aakeröy
DOI:10.3390/molecules26144125
日期:——
increasing the structure directing ability of halogen bonds and chalcogen bonds as compared to intermolecular hydrogen bonding. The delicate balance between these intermolecular forces was further underlined by the formation of two polymorphs of 5-(4-iodophenyl)-1,3,4-thiadiazol-2-amine; Form I displayed all three interactions while Form II only showed hydrogen and chalcogen bonding. The results emphasize that
为了探索特定的原子间置换如何改变 1,3,4-硫属元素二唑衍生物的静电势,并有意改变分子间相互作用之间的平衡,合成并表征了四个目标分子。DFT 计算表明,与分子间氢键相比,Br 与 I 的原子间取代和 S 与 Se 的原子间取代增强了 σ 空穴势,从而提高了卤素键和硫属元素键的结构导向能力。5-(4-碘苯基)-1,3,4-噻二唑-2-胺的两种多晶型物的形成进一步强调了这些分子间作用力之间的微妙平衡;I型显示所有三种相互作用,而II型仅显示氢和硫属元素键合。