从容易获得的甲基酮,丙二腈,溴和碱金属乙酸盐开始,报道了一种以高收率和优良纯度合成2-酰基-1,1,1,3,3-四氰基丙烯盐(ATCN)盐的新颖途径。新型DMSO–NaBr–H 2 SO 4将起始的芳基(杂芳基)甲基酮氧化为相应的α-酮醛在8-10分钟的短时间内,氧化系统的收率高达90%。根据“绿色化学”的原则5,ATCN的后续制备过程可在水性介质中完成,无需使用任何有毒溶剂。通过X射线衍射分析表征2-苯甲酰基-1,1,3,3-四氰基丙烯腈中的锂,钠,钾,和铯。这些盐显示出合成五元和六元杂环的良好潜力,并且可以在配位和超分子化学中用作潜在有用的配体。
从容易获得的甲基酮,丙二腈,溴和碱金属乙酸盐开始,报道了一种以高收率和优良纯度合成2-酰基-1,1,1,3,3-四氰基丙烯盐(ATCN)盐的新颖途径。新型DMSO–NaBr–H 2 SO 4将起始的芳基(杂芳基)甲基酮氧化为相应的α-酮醛在8-10分钟的短时间内,氧化系统的收率高达90%。根据“绿色化学”的原则5,ATCN的后续制备过程可在水性介质中完成,无需使用任何有毒溶剂。通过X射线衍射分析表征2-苯甲酰基-1,1,3,3-四氰基丙烯腈中的锂,钠,钾,和铯。这些盐显示出合成五元和六元杂环的良好潜力,并且可以在配位和超分子化学中用作潜在有用的配体。
derivatives against carbonicanhydrase I and II isoenzymes were investigated for the first time. The inhibition concentrations of the imidazole derivatives were found to be in the range of 2.89–115.5 nM. Docking studies examined the binding properties of the imidazole derivatives, and the structure–activity relationship is discussed. Theoretical calculations showed that the bindingmode of the imidazole
results of these two tests showed that both lead compounds affected the G0/G1 phase and did not allow the cells to reach the synthesis phase. The log BB (blood–brain barrier) and Caco-2 permeability of the synthesized molecules were calculated and it was shown that imidazopyridine derivatives taken orally are likely to pass through gastrointestinal membrane and the blood–brain barrier.
Mono- or di-substituted imidazole derivatives were synthesized using a one-pot, two-step strategy. All imidazole derivatives were tested for AChE and BChE inhibition and showed nanomolar activity similar to that of the test compound donepezil and higher than that of tacrine. Structure activity relationship studies, docking studies to on X-ray crystal structure of AChE with PDB code 1B41, and adsorption
We report a visible-light-mediated organocatalytic strategy for the enantioselective acyl radical conjugate addition to enals, leading to valuable 1,4-dicarbonyl compounds. The process capitalizes upon the excited-state reactivity of 4-acyl-1,4-dihydropyridines that, upon visible-light absorption, can trigger the generation of acyl radicals. By means of a chiral amine catalyst, iminium ion activation
Base-Controlled Reactions through an Aldol Intermediate Formed between 2-Oxoaldehydes and Malonate Half Esters
作者:Atul Kumar、Shahnawaz Khan、Qazi Naveed Ahmed
DOI:10.1021/acs.orglett.7b02016
日期:2017.9.15
atom-economical, base-directed, and highlyefficient method for the generation of different selective products through a common aldol intermediate of 2-oxoaldehydes and malonate half esters is successfully developed. The addition of a strong basic environment (potassium tert-butoxide) catalyzed the synthesis of stable decarboxylative aldol products (α-hydroxyketones), while the Doebner modification procedure