Ammonium iodide-promoted cyclization of ketones with DMSO and ammonium acetate for synthesis of substituted pyridines
作者:Xiaojun Pan、Qiao Liu、Liming Chang、Gaoqing Yuan
DOI:10.1039/c5ra07584j
日期:——
A simple and efficient method has been developed for the synthesis of symmetrical and unsymmetrical pyridines via NH4I-promoted cyclization of ketones with DMSO and NH4OAc. It was found that methyl ketones always gave selective formation of the unsymmetrical pyridine, while non-methyl ketones gave unpredictable results (symmetrical or non-symmetrical product only, or a mixture of the two). In addition
Synthesis of diverse di- to penta-substituted 1,2-dihydropyridine derivatives from gold(I)-catalyzed intramolecular addition of tertiary enamides to alkynes
作者:Xingyi Zhang、Xin-Ming Xu、Liang Zhao、Jingsong You、Jieping Zhu、Mei-Xiang Wang
DOI:10.1016/j.tetlet.2015.04.105
日期:2015.6
alkyne-bearing tertiaryenamides underwent an efficient Au(I)-catalyzed 6-endo-dig cyclization reaction to afford a variety of di- to penta-substituted 1,2-dihydropyridine derivatives in high yields. The cyclization proceeds through a cascade comprising an intramolecular nucleophilic addition of enaminic carbon to alkyne–gold(I) complex, deprotonation, and protodeauration steps. Au(I)-catalyzed tertiary enamide–alkyne
Fe-catalyzed N–O bond cleavage of ketoxime carboxylates in the presence of tertiary anilines. The methylene carbon on N,N-dialkylanilines functioned as a source of one-carbon synthon in the reaction. The reaction used readily available starting materials, tolerated various functional groups, and afforded 2,4-disubstituted and 2,4,6-trisubstituted pyridines in good to high yields under mild conditions.
has been developed for the preparation of substituted pyridines from ketones. In this transformation, the co‐product formic acid was formed from ammonium formate, which acted as an important catalyst for the reaction. Notably, this transformation exhibited a broad substrate scope towards a wide variety of different ketones to give the corresponding substituted pyridines in high yields. Mechanistic
[EN] QUALITATIVE STRUCTURE ACTIVITY RELATIONSHIP (QSAR) OF NEW ORGANIC COMPOUNDS SYNTHESIZED BY STILLE CROSS COUPLING REACTION WITH ANTITUMOR ACTIVITY<br/>[FR] RELATION QUALITATIVE STRUCTURE-ACTIVITÉ (RQSA) DE NOUVEAUX COMPOSÉS ORGANIQUES SYNTHÉTISÉS PAR UNE RÉACTION DE COUPLAGE CROISÉ DE STILLE PRÉSENTANT UNE ACTIVITÉ ANTITUMORALE
申请人:ABOU ELSAOUD YASMINE MOHAMED HASHEM EZZ EL DIN
公开号:WO2015127941A1
公开(公告)日:2015-09-03
Novel diaryldithiophene and hetero mono and/or dithiophene Derivatives (7-11) were designed, synthesized with stille coupling reaction conditions and evaluated for their antitumor activities in 3 different cell lines; MCF7, HEPG2 and Lung Cancer. Compounds (7, 8, 9, 10 and 11) exhibited highly potent cytotoxic activity with IC50 values in 0.042 - 4.09 μΜ ranges respectively. Also molecular docking study was carried out using complex (H10V) as template to predict the binding affinity of the target compounds to the receptor.