Abstract The synthesis of 5-aryl-4-oxo-3,4,5,8-tetrahydropyrido[2,3-d]pyrimidine-7-carboxylic acids 3 from the reaction of 6-aminopyrimidines 1 with arylidenederivatives of pyruvic acid 2 under microwave and ultrasound irradiation is described. The orientation of cyclization process was determined by NMR measurements. The methodology provides advantages such as high yields and friendly to the environment
Features of 3-amino-5-methylisoxazole in heterocyclizations involving pyruvic acids
作者:Alisa D. Morozova、Elena A. Muravyova、Svitlana V. Shishkina、Dmytro Sysoiev、Toma Glasnov、Vladimir I. Musatov、Sergey M. Desenko、Valentyn A. Chebanov
DOI:10.1007/s10593-019-02422-8
日期:2019.1
The chemical properties of 3-amino-5-methylisoxazole in the reactions involving pyruvic acid derivatives are reported. The multicomponent condensation of 3-amino-5-methylisoxazole, aromatic aldehyde, and pyruvic acid was not effective while the treatment of the starting amine with pyruvic acid derivatives led to suitable synthetic procedures for selective synthesis of furanones and pyrrolones. It was
Synthesis and cytotoxicity of new thiazolo[4,5-b]pyridine-2(3H)-one derivatives based on α,β-unsaturated ketones and α-ketoacids
作者:Andrii Lozynskyi、Borys Zimenkovsky、Lidia Radko、Sylwia Stypula-Trebas、Olexandra Roman、Andrzej K. Gzella、Roman Lesyk
DOI:10.1007/s11696-017-0318-1
日期:2018.3
AbstractA series of thiazolo[4,5-b]pyridin-2(3H)-one derivatives were obtained via [3 + 3]-cyclization of 4-amino-5H-thiazol-2-one and α,β-unsaturated ketones or α-ketoacids. The structures of newly synthesized compounds were established by spectral data and a single-crystal X-ray diffraction analysis. Target compounds were screened for their anticancer activity according to US NCI protocols and moderate
摘要通过4-氨基-5 H-噻唑-2-酮和α,β-不饱和的[3 + 3]-环化获得一系列噻唑并[4,5- b ]吡啶-2(3 H)-one衍生物酮或α-酮酸。通过光谱数据和单晶X射线衍射分析来建立新合成的化合物的结构。根据US NCI方案筛选目标化合物的抗癌活性,并确认了对测试细胞系的中等抑制活性。5-苯基-7-(吡啶-3-基)-3 H-噻唑并[4,5 - b ]吡啶-2-一(3)和2-氧代-7-噻吩-2-基-2,3-二氢噻唑并[4,5 - b ]吡啶-5-羧酸(12筛选了它们对HepG2和Balb / c 3T3细胞的细胞毒性作用,使用MTT,NRU和TPC分析显示了令人鼓舞的结果。 图形概要
Efficient synthesis of pyrido[2,3-<i>d</i>]pyrimidine-7-carboxylic acids catalyzed by a TiO<sub>2</sub>/SiO<sub>2</sub> nanocomposite in aqueous media at room temperature
作者:Sepehr Sadegh-Samiei、Shahrzad Abdolmohammadi
DOI:10.1515/znb-2018-0076
日期:2018.9.25
Abstract A novel and efficientsynthesis of eight 5-aryl-1,3-dimethyl-2,4-dioxo-1,2,3,4,5,8-hexahydropyrido[2,3-d]pyrimidine-7-carboxylic acids using a TiO2/SiO2 nanocomposite with a molar ratio of 1:1 as a recyclable heterogeneous catalyst is described. The desired products, five of which are new, are formed in short reaction times (2–3 h) with high to excellent yields (94%–98%) under very moderate
Arylidene Pyruvic Acids Motif in the Synthesis of New 2<i>H</i>,5<i>H</i>-Chromeno[4′,3′:4,5]thiopyrano[2,3-<i>d</i>]thiazoles via Tandem Hetero-Diels–Alder-Hemiacetal Reaction
作者:Andrii Lozynskyi、Borys Zimenkovsky、Andrzej K. Gzella、Roman Lesyk
DOI:10.1080/00397911.2015.1076004
日期:2015.10.2
reaction using arylidene pyruvic acids with 5-(ortho-hydroxybenzylidene)-substituted 4-thioxo-2-thiazolidinones, leading to 6-hydroxy-2-oxo-5-phenyl-3,5a,6,11b-tetrahydro-2H,5H-chromeno[4′,3′:4,5]thiopyrano[2,3-d][1,3]thiazole-6-carboxylic acids. The stereochemistry of cycloaddition was confirmed by NMR spectra and a single-crystal x-ray diffraction analysis. GRAPHICAL ABSTRACT
摘要 我们开发了一种使用亚芳基丙酮酸与 5-(邻-羟基苯亚甲基)-取代的 4-硫代-2-噻唑烷酮的串联杂-Diels-Alder-半缩醛反应,产生 6-羟基-2-氧代-5-苯基- 3,5a,6,11b-四氢-2H,5H-色基[4',3':4,5]噻唑并[2,3-d][1,3]噻唑-6-羧酸。环加成的立体化学通过核磁共振谱和单晶 X 射线衍射分析得到证实。图形概要