Discovery of [1,2,4]-triazolo [1,5-a]pyrimidine-7(4H)-one derivatives as positive modulators of GABAA1 receptor with potent anticonvulsant activity and low toxicity
antiepileptic drugs, a series of 2,5-disubstituted [1,2,4]-triazolo[1,5-a]pyrimidine-7(4H)-one derivatives were designed and synthesized. Spontaneous Ca2+ oscillations (SCOs) of cortical neurons were used for in vitro phenotypic screening. Maximal electroshock test (MES) and pentylenetetrazole (PTZ) test were used to access their anticonvulsantactivity, and rotarod test was used to estimate their neurotoxicity
Divergent reactivity of α-oximino carbenoids: facile access to 2-isoxazolines and 2H-azirines
作者:Xinxin Qi、Yaojia Jiang、Cheol-Min Park
DOI:10.1039/c1cc11683e
日期:——
Mild catalytic reaction conditions for the synthesis of 2-isoxazolines and 2H-azirines have been developed via carbenoidsderivedfrom alpha-oximino diazo compounds. This has been utilized in the one-pot synthesis of pyrroles in the presence of 1,3-dicarbonyl compounds.
of new chiral N -phosphinyl β-enamino esters and amides were successfully prepared with excellent Z -stereoselectivity ( Z / E > 99:1 in nearly all cases). Group-assisted purification chemistry proved to be an efficient method for the asymmetric reduction of the resulting β-enamino esters/amides to give enantiopure β-amino esters/amides. The asymmetric reduction can be controlled efficiently by using
3,4,5-Trimethylphenol and Lewis Acid Dual-Catalyzed Cascade Ring-Opening/Cyclization: Direct Synthesis of Naphthalenes
作者:He Ma、Xiu-Qin Hu、Yong-Chun Luo、Peng-Fei Xu
DOI:10.1021/acs.orglett.7b03392
日期:2017.12.15
dual-catalyzed cascadereaction of donor–acceptor (D–A) cyclopropanes via ring-opening and cyclization is developed. In this reaction, a phenolic compound was used as a covalent catalyst for the first time. Additionally, control experiments proved that 3,4,5-trimethylphenol completed the catalytic cycle by accomplishing the C–C bond cleavage. Using this strategy, a wide variety of substitutednaphthalenes has