Evaluating hydrogen bonding control in the diastereoselective Diels–Alder reactions of 9-(2-aminoethyl)-anthracene derivatives
作者:R. A. Bawa、F.-M. Gautier、H. Adams、A. J. H. M. Meijer、S. Jones
DOI:10.1039/c5ob01343g
日期:——
Hydrogen bonding can be used to control the stereoselectivity of the cycloaddition of some anthracene derivatives. DFT calculations provide support for the origins of the selectivity in these reactions.
BP23C7: high-yield synthesis and application in constructing [3]rotaxanes and responsive pseudo[2]rotaxanes
作者:Manisha Prakashni、Suvankar Dasgupta
DOI:10.1039/d3ob02094k
日期:——
BP23C7 forms pseudo[2]rotaxane with a dibenzylammonium ion (DBA+), exhibiting a good association constant value (ka = 1 × 103 M−1). Subsequently, fluorophoric properties of BP23C7 and anthracene terminated axles are blended to create responsive pseudo[2]rotaxanes. The “turn-on” fluorescence response of BP23C7 due to the addition of fluoride and chloride anions to pseudo[2]rotaxane systems has been investigated
以市售起始原料合成联苯-23-冠-7 醚 (BP23C7),收率 86%。 BP23C7与二苄基铵离子(DBA + )形成假[2]轮烷,表现出良好的缔合常数值( k a = 1 × 10 3 M -1 )。随后,将 BP23C7 和蒽封端轴的荧光特性混合以产生响应性假[2]轮烷。已经研究了由于向拟[2]轮烷系统中添加氟和氯阴离子而引起的 BP23C7 的“开启”荧光响应。由于离子对形成而引起的相应轴的蒽部分的伴随荧光猝灭已经得到解决。此外,[23]冠醚的两种变体,即BP23C7和邻二甲苯-23-冠-7醚(X23C7),被应用于构建同[3]轮烷结构。由DBA +部分和末端烯烃组成的半轴分别与两种[23]冠醚混合,并使用格鲁布斯第一代催化剂进行自复分解。
Intramolecular Diels-Alder additions. 1. Additions to anthracene and acridine
作者:Engelbert Ciganek
DOI:10.1021/jo01296a031
日期:1980.4
In(III) and Sc(III) based coordination polymers derived from rigid benzimidazole-5,6-dicarboxylic acid: Synthesis, crystal structure and catalytic property
作者:Juan Chai、Pengcheng Wang、Jia Jia、Bing Ma、Jing Sun、Yufang Tao、Ping Zhang、Li Wang、Yong Fan
DOI:10.1016/j.poly.2017.10.028
日期:2018.2
Two new coordination polymers (CPs), [InCl(H(2)bidc)(2)(H2O)](n) (1) and [Sc(Hbidc)(OH)(H2O)](n) (2) (H(3)bidc = benzimidazole-5,6-dicarboxylic acid) were synthesized through a solvothermal approach. 1 exhibits a 1D infinite chain, which further constructs a 3D supramolecular framework via hydrogen bonds. 2 features a 3D supramolecular framework consisting of left- and right-handed chiral layers, which contain the left- and right-handed chiral spiral chains. The adjacent layers stack through pi-pi stacking interactions between benzene and imidazole rings. 1 exhibits excellent catalytic reactivity for the Strecker reaction and can be recycled four consecutive reactions with more than 95% conversion yields. (C) 2017 Elsevier Ltd. All rights reserved.
Polycyclic maleimide-based derivatives as first dual modulators of neuronal calcium channels and GSK-3β for Alzheimer's disease treatment
作者:Alessandra Bisi、Raquel L. Arribas、Matteo Micucci、Roberta Budriesi、Alessandra Feoli、Sabrina Castellano、Federica Belluti、Silvia Gobbi、Cristobal de los Rios、Angela Rampa
DOI:10.1016/j.ejmech.2018.12.003
日期:2019.2
Current healthcare has significantly increased the average life expectancy, leading to a consequently greater incidence of age-related diseases, such as Alzheimer's disease. Following a multitarget approach, in this paper a series of polycyclic maleimide-based derivatives were designed and synthesized aimed at simultaneously modulate neuronal calcium channels and glycogen synthase kinase 3-beta (GSK-3(3 beta), validated targets to combat Alzheimer' disease. Different structural modifications were performed on the polycyclic scaffold in order to investigate the structure-activity relationships and compound 10 emerged as a promising non-toxic lead compound, endowed with calcium modulating brain-addressed properties and significant GSK-3 beta inhibitory activity. Moreover, the easily affordable polycyclic core appears as a new appealing privileged structure in medicinal chemistry. (C) 2018 Elsevier Masson SAS. All rights reserved.