Ionic liquid-assisted synthesis of dihydropyrimidin(thi)one Biginelli adducts and investigation of their mechanism of urease inhibition
作者:Taniris Cafiero Braga、Thamara Ferreira Silva、Thamilla Maria Silva Maciel、Edjan Carlos Dantas da Silva、Edeildo Ferreira da Silva-Júnior、Luzia Valentina Modolo、Isis Martins Figueiredo、Josué Carinhanha Caldas Santos、Thiago Mendonça de Aquino、Ângelo de Fátima
DOI:10.1039/c9nj03556g
日期:——
Twenty-six Biginelli adducts were synthesized through an ionic liquid-assisted synthesis with up to 92% yield. Sixteen of these Biginelli adducts were then assayed to determine their antiureolytic activity against purified urease from jack beans. The substances BA7-S, BA9-S and BA11-S were shown to be as efficient inhibitors as hydroxyurea, a positive control used in in vitro screening assay against
通过离子液体辅助合成法合成了26种Biginelli加合物,收率高达92%。然后分析这些Biginelli加合物中的16种,以确定它们对来自千斤顶豆的纯化脲酶的抗脲水解活性。物质BA7-S,BA9-S和BA11-S被证明是与羟基脲有效的抑制剂,羟基脲是用于体外抗脲酶筛选试验的阳性对照。荧光研究表明,BA7-S,BA9-S,BA11-S和BA5-S分别具有5.95、6.72、4.55和4.28 M -1的高结合常数,而BAS12-S无取代基的log K b = 2.16 M -1的值低 。另外,在最热力学上有利的BA5-S和BA7-S脲酶复合物中,相应的Biginelli加合物能够通过非离子相互作用(例如疏水相互作用或氢和范德华相互作用)与脲酶的活性位点相互作用, 分别。计算机分析研究还支持BA与活性位点相互作用,从而证实了荧光和动力学分析研究,这清楚表明BA5-S和BA7-S是竞争性抑制剂(K
(C<sub>5</sub>H<sub>6</sub>N<sub>4</sub>O)(C<sub>5</sub>H<sub>5</sub>N<sub>4</sub>O)<sub>3</sub>(C<sub>5</sub>H<sub>4</sub>N<sub>4</sub>O)[Bi<sub>2</sub>Cl<sub>11</sub>]Cl<sub>2</sub>as a simple and efficient catalyst in Biginelli reaction
作者:Xiang Zhang、Xiaoyu Gu、Yuhua Gao、Shipeng Nie、Hongfei Lu
DOI:10.1002/aoc.3590
日期:2017.4
A highly efficient and facile procedure for the one‐pot three‐component synthesis of 3,4‐dihydropyrimidin‐2‐(1H)ones/thiones from the one‐pot condensation of aldehyde, β‐dicarbonyl compound and urea/thiourea was developed. The methodology is applicable to a wide range of substrates with high yield in the presence of (C5H6N4O)(C5H5N4O)3(C5H4N4O)[Bi2Cl11]Cl2. The complex is an air‐stable, environmentally
开发了一种高效,简便的方法,该方法可通过醛,β-二羰基化合物和尿素/硫脲的一锅缩合反应一锅三组分合成3,4-二氢嘧啶-2-(1 H)酮/硫酮。该方法适用于(C 5 H 6 N 4 O)(C 5 H 5 N 4 O)3(C 5 H 4 N 4 O)[Bi 2 Cl 11 ] Cl 2。该络合物是一种对空气稳定,对环境友好且可回收的催化剂,可以有效催化Biginelli反应。该催化剂具有高催化效率和低催化剂载量,并且可以循环十次而活性损失很小。
作者:Xiao-Hua Chen、Xiao-Ying Xu、Hua Liu、Lin-Feng Cun、Liu-Zhu Gong
DOI:10.1021/ja065267y
日期:2006.11.1
aldehydes, thiourea or urea, and beta-keto esters. A new chiral phosphoric acid, derived from 3,3'-diphenyl-H8-binol, exhibited superior catalytic activity and enantioselectivity compared to its structural analogues, affording high enantioselectivities ranging from 85 to 97% ee with a wide scope of substrates. A metal-free preparation of optically active monastrol was achieved on the basis of the current
A reactant promoted solvent free synthesis of 3,4-dihydropyrimidin-2(1 H )-thione analogues using ammonium thiocyanate
作者:Chetan K. Khatri、Santoshkumar M. Potadar、Ganesh U. Chaturbhuj
DOI:10.1016/j.tetlet.2017.03.070
日期:2017.5
as a self-promoting reactant for the synthesis of 3,4-dihydropyrimidin-2(1H)-thiones. This report describes a greener, efficient and economic protocol for one pot three-componentsynthesis of Biginelli compounds using various aldehydes, β-ketoesters and ammonium thiocyanate. Ammonium thiocyanate being a weak acid, accelerate the rate of reaction to obtain Biginelli compounds in solvent-free condition
Synthesis of 6-unsubstituted 2-oxo, 2-thioxo, and 2-amino-3,4-dihydropyrimidines and their antiproliferative effect on HL-60 cells
作者:Yoshio Nishimura、Hidetomo Kikuchi、Takanori Kubo、Yuki Gokurakuji、Yuri Nakamura、Rie Arai、Bo Yuan、Katsuyoshi Sunaga、Hidetsura Cho
DOI:10.1016/j.tetlet.2020.151967
日期:2020.7
smoothly proceeds to give 6 and 7 in high yields. A synthetic novelty of our protocol is as follows: 1) Lewis acid-mediated reaction, 2) good to high yields, 3) broad scope as for aldehydes, and ureas. Hitherto unavailable 6-unsubstituted 2-aminodihydropyridimidine 8 has been obtained from the 2-thioxo derivative 6 by a stepwise method involving a substitutionreaction with the amine at the 2-position