Aminopropyl carbazole analogues as potent enhancers of neurogenesis
摘要:
Neural stem cells are multipotent and self-renewing cells that can differentiate into new neurons and hold great promise for treating various neurological disorders including multiple sclerosis, Parkinson's disease, and Alzheimer's disease. Small molecules that can trigger neurogenesis and neuroprotection are particularly useful not only because of their therapeutic implications but also because they can provide an invaluable tool to study the mechanisms of neurogenesis. In this report, we have developed and screened 25 aminopropyl carbazole derivatives that can enhance neurogenesis of cultured neural stem cells. Among these analogues, compound 9 demonstrated an excellent proneurogenic and neuroprotective activity with no apparent toxicity. We believe that compound 9 can serve as an excellent lead to develop various analogues and to study the underlying mechanisms of neurogenesis. (C) 2013 Elsevier Ltd. All rights reserved.
Catalytic metallodendrimers grafted on mesoporous polymethacrylate beads for the regioselective synthesis of β-amino alcohols under solvent-free conditions
作者:Richa Tiwari、Sachdeo H. Daware、Sandeep B. Kale
DOI:10.1039/c5ra04903b
日期:——
Metallodendrimer-grafted mesoporous polymethyacrylate beads for the regioselective, solvent-free, efficient and scalable catalytic synthesis of β-amino alcohols at ambient temperature.
An efficient and rapid procedure for ring opening of various epoxides with aromatic, aliphatic and heterocyclicamines is developed at room temperature under solvent-free conditions in the presence of (C4H12N2)2[BiCl6]Cl·H2O (1 mol %). This catalyst can be reused several times without losing of its activity.
在(C 4 H 12 N 2)2 [BiCl 6 ] Cl·H 2 O存在下,在室温下在无溶剂的条件下,开发了一种高效快速的方法,可用于芳族,脂族和杂环胺的各种环氧化物的开环。(1摩尔%)。该催化剂可以重复使用几次而不会失去其活性。
Highly Regioselective and Efficient Synthesis of Aminoepoxides by Ring Closure of Aminohalohydrins Mediated by KF-Celite
The regioselective synthesis of several aminoepoxides has beenachieved without observing any trace of azetidinols, which are usuallyreported as the exclusive reaction products when aminohalohydrinsare treated with bases. The use of the mild supported base KF-Celitein refluxing acetonitrile is crucial for modulating the excellentregioselectivity observed.
Stereocontrolled, Divergent, Al(lll)-Catalyzed Coupling of Chiral <i>N</i>-Aryl Epoxy Amines and CO<sub>2</sub>
作者:Yuseop Lee、Jonghoon Choi、Hyunwoo Kim
DOI:10.1021/acs.orglett.8b02186
日期:2018.8.17
achieved between N-aryl epoxy amines and CO2. By using two different cocatalysts, tetrabutylammonium iodide (TBAI) or 4-dimethylaminopyridine (DMAP) together with an Al(III) Lewis acid, cycliccarbonates or oxazolidinones were selectively produced through two distinct reaction pathways, respectively. The proposed reaction mechanism was supported by the stereochemical determination of the products. A
Switchable synthesis of cyclic carbamates by carbon dioxide fixation at atmospheric pressure
作者:Yasunori Toda、Minoru Shishido、Tatsuya Aoki、Kimiya Sukegawa、Hiroyuki Suga
DOI:10.1039/d1cc02493k
日期:——
base-promoted switchable synthesis of five- and six-membered cyclic carbamates using atmospheric pressure carbondioxide as the C1source was developed. The chemoselectivity of products was simply controlled by changing bases and solvents. The reaction proceeds effectively undermildconditions, affording valuable cyclic carbamates. Experimental results and DFT studies revealed the reaction mechanism.