1-甲基-3,4-二苯基喹啉-2(1H)-酮的合成和结构表征

以N-甲基苯胺和苯丙炔酸为原料,经过缩合、亲电环化、偶联反应合成了1-甲基-3,4-二苯基喹啉-2(1H)-酮;利用核磁共振谱和气相色谱-质谱表征了产物的结构.结果表明,所用合成方法具有产率高、反应条件温和、操作简单等优点,目标产物的总产率达62.7%.     

4-羟基-2(1H)-吡啶酮-3-甲酰胺类冬青生菌素类似物的合成与生物活性

以反式-4-羟基肉桂酸为起始原料,经乙酰化、酰基叠氮、curtius重排、加成和环合等6步反应合成了4-羟基-2(1 H)-吡啶酮-3-甲酰胺类冬青生菌素类似物,总收率17%.随后用滤纸片扩散法对该化合物的抑菌性能进行了初步研究.实验表明,该化合物对于白色念珠菌具有较好的抑制作用,对于酵母菌抑制作用较弱,对大肠杆菌和金黄色葡萄球菌基本无抑制作用.     

新型5-苯亚甲基-3,4-二卤-2(5H)-呋喃酮衍生物的合成与生物活性

以粘卤酸为起始原料,经还原缩合、再缩合、成醚反应合成了15个5-苯亚甲基-3,4-二卤-2(5H)-呋喃酮衍生物4a-4o,其结构经~1H-NMR、~(13)C-NMR、MS谱确证.研究所有化合物对细菌脂多糖LPS诱导RAW264.7细胞的抗炎作用.初步活性结果显示,4a-4o对于LPS诱导RAW264.7细胞所产生的NO有抑制作用,其中化合物4h和4i的NO抑制率比较高.生物活性的研究结果表明,卤代呋喃酮结构、吡啶环上连有给电子基团都可以提高化合物的体外抗炎生物活性,为临床上炎症等相关疾病的治疗提供新的药物设计和研究思路.     

(5-甲基-2-烷氧基苯基)-1-烃基胺的合成

以对甲酚(1)为起始原料,经醚化、酰化和还原氨化反应合成了5个(5-甲基-2-乙氧基苯基)-1-烃基胺;1经酯化、Fries重排、醚化和还原氨化反应合成了5个(5-甲基-2-甲氧基苯基)-1-烃基胺.其结构经1H NMR,13C NMR,IR和GC-MS表征.     

6-溴甲基-2-甲基-3(H)-喹唑啉-4-酮的合成

6-溴甲基-2-甲基-3(H)-喹唑啉-4-酮(见图1所示)是治疗晚期结肠癌和直肠癌的一线药物雷替曲赛(Raltitrexed)[1～3]的重要中间体.Raltitrexed是由英国AstraZeneca公司开发的胸苷酸合成酶抑制剂,已经在全球主要发达国家上市.Raltitrexed可以选择性地抑制胸苷酸合酶(thymidylate synthase,TS),干扰TS正常的生理功能,抑制DNA的合成,进而起到抑制肿瘤细胞生长或增殖的作用[4～5].     

含三唑结构2(5H)-呋喃酮衍生物的合成

研究5-烷氧-3,4-二溴-2(5H)-呋喃酮与末端炔烃、叠氮化钠的"一锅煮"反应,没有得到预期的稠杂环化合物,仅得到了5-烷氧-4-三唑基-3-溴2(5H)-呋喃酮,产物的结构用紫外―可见光谱(UV-Vis)、红外光谱(IR)、质谱(MS)、核磁共振氢谱(1H NMR)、核磁共振碳谱(13C NMR)和元素分析等表征和证实。该含1,2,3-三唑结构溴代2(5H)-呋喃酮化合物的意外合成,能为某些多官能团的、结构复杂的2(5H)-呋喃酮化合物的合成提供新途径。     

基于稳定的膦叶立德合成2(5H)-呋喃酮和2(5H)-吡咯酮作为细菌群体感应抑制剂的研究

利用稳定的乙酸乙酯基膦叶立德与含羰基化合物反应,合成了不同的2(5H)-呋喃酮,然后将获得的部分2(5H)-呋喃酮与醋酸铵反应转化为2(5H)-吡咯酮类化合物.所合成化合物均经1H NMR、13C NMR和MS等确认.通过测定所得到的化合物对于绿脓杆菌的最低抑菌浓度(MIC)来检验其抑菌活性;利用细莆生物膜染色实验来检测所得到的化合物对细菌群体感应系统和细菌生物膜的影响.活性实验结果表明,所得到的2(5H)-呋喃酮类化合物和2(5H)-吡咯酮类化合物均具有一定的抑制细菌群体感应的能力.     

5(4H)-吡啶酮并氧化呋咱及其核苷衍生物的合成及结构表征

设计了一个新化合物——5(4H)-吡啶酮并氧化呋咱(4H,5H-[1,2,5]噁二唑[3,4-b]吡啶-5-酮-1-氧化物),对它的合成方法及四乙酰核糖核苷衍生物的合成进行了研究.合成产物及中间体经1HNMR、质谱和元素分析进行了结构鉴定.     

3-羟基-4-甲基-5-乙基-2(5H)-呋喃酮的合成

报道了以草酸二乙酯为原料,制备具有焦糖香味的香料化合物3-羟基-4-甲基-5-乙基-2(5H)-呋喃酮的方法:首先乙基溴化镁与草酸二乙酯通过格氏反应,以约50%产率生成2-氧代丁酸乙酯,然后其在碳酸钾的作用下发生缩合反应,以约94%产率得到3-羟基-4-甲基-5-乙基-5-乙氧羰基-2(5H)-呋喃酮,再通过水解、脱羧反应,得到3-羟基-4-甲基-5-乙基-2(5H)-呋喃酮.路线总收率约36%.     

N-甲基-4-羟基-5-苯基-2-吡啶酮的合成

以丙二酸和二氯亚砜为起始原料,经氯代、环合、催化氢化及烷基化反应合成了新化合物——N-甲基-5-苯基-4-羟基-2-吡啶酮,总收率38.7％,其结构经1H NMR,IR和EI-MS表征.     

One-Pot Three-Component Synthesis of 3-Methyl-4-Arylmethylene- Isoxazol-5(4H)- Ones Catalyzed by Sodium Sulfide

Abstract

3-Methyl-4-arylmethylene-isoxazol-5(4H)-ones were synthesized by the convenient three-component reaction of ethyl acetoacetate, hydroxylamine hydrochloride, and aromatic aldehydes catalyzed by sodium sulfide in the presence of ethanol at room temperature. The advantages of this procedure were mild reaction conditions, high yields, short reaction time, and operational simplicity.     

1H and 13C spectral assignment of 2(1H)-pyridone derivatives

1H and 13C NMR spectroscopic data for 4-aryl-3,4-dihydro-6-methyl-2(1H)pyridone derivatives were fully assigned by a combination of one- and two- dimensional experiments (DEPT, HMBC, HMQC, COSY, NOE).     

Synthesis and Crystal Structure of 4-Bromo-5-ethoxy-3-methyl-5- （naphthalen- 1-yl）- 1-tosyl- 1H-pyrrol-2（5H）- one

The title compound 4-bromo-5-ethoxy-3-methyl-5-(naphthalen-1-yl)-1-tosyl-1H- pyrrol-2(5H)-one 1 (C24H22BrNO4S, Mr = 500.40) has been synthesized and its crystal structure was determined by single-crystal X-ray diffraction analysis. It crystallizes in monoclinic, space group P21/n with a = 8.8562(15), b = 18.118(3), c = 14.055(2) , β = 99.855(3)o, V = 2221.9(6) 3, Z = 4, Dc = 1.496 g/cm3, μ = 1.975 mm-1, λ = 0.71073 , F(000) = 1024, R = 0.0607 and wR = 0.1371.     

Cytoprotective Activity of Newly Synthesized 3-(Arylmethylamino)-6-Methyl-4-Phenylpyridin-2(1H)-Ones Derivatives

Currently, studies are being conducted on the possible role of the cytoprotective effect of biologically active substances in conditions of cerebral hypoxia or cardiomyopathies. At the same time, oxidative stress is considered one of the important mechanisms of cellular cytotoxicity and a target for the action of cytoprotectors. The aim of this study is to search for derivatives of 3-(arylmethylamino)-6-methyl-4-phenylpyridin-2(1H)-ones. The probability of cytoprotective action was assessed by measuring cell viability using two tests (with neutral red dye and MTT test). It was found that some derivatives of 3-(arylmethylamino)-6-methyl-4-phenylpyridin-2(1H)-ones under the conditions of our experiment had a pronounced cytoprotective activity, providing better cell survival in vitro, including the MTT test and conditions of blood hyperviscosity. To correlate the obtained results in vitro, molecular docking of the synthesized derivatives was also carried out. The standard drug omeprazole (co-crystallized with the enzyme) was used as a standard. It was shown that all synthesized derivatives of 3-(arylmethylamino)-6-methyl-4-phenylpyridin-2(1H)-ones had higher affinity for the selected protein than the standard gastro-cytoprotector omeprazole. The studied derivatives of 3-(arylmethylamino)-6-methyl-4-phenylpyridin-2(1H)-ones also fully satisfy Lipinski’s rule of five (RO5), which increases their chances for possible use as orally active drugs with good absorption ability and moderate lipophilicity. Thus, the results obtained make it possible to evaluate derivatives of 3-(arylmethylamino)-6-methyl-4-phenylpyridin-2(1H)-ones as having a relatively high cytoprotective potential.     

2-(5-甲基-2-苯基-4-噁唑基)乙醇的合成工艺改进

以L-天门冬氨酸为原料,经过β-甲酯化,苯甲酰化,Dak in-W est反应,环合和氢化铝锂还原等反应步骤,以36.1%的总收率得到抗糖尿病药物的重要中间体2-(5-甲基-2-苯基-4-噁唑基)乙醇.用浓硫酸取代三氯氧磷作为关环剂,简化了环合工艺和后处理操作.     

3-氯-4-二苄胺基-5-甲氧基-2(5H)-呋喃酮的合成与晶体结构

在THF溶液中合成了标题化合物3-氯-4-二苄胺基-5-甲氧基-2(5H)-呋喃酮,并用FT-IR、UV-Vis、1HNMR、13C NMR、MS、元素分析和X-射线衍射等进行了表征。结果表明此化合物属正交晶系,空间群为Pbca,晶胞参数为:a=15.891(16),b=11.126(11),c=19.778(19),α=β=γ=90°,V=3497(6)3,Z=8,Dc=1.306Mg/m3,μ=0.234 mm-1,F(000)=1440。在化合物的分子结构中,两个苯环几乎垂直于呋喃酮平面,且它们与呋喃酮平面的两面角分别为89.38°和88.19°。     

2-甲基-2-(2-硝基乙烯基)-1-苯并环酮的对映选择合成

在有些具有强烈生理活性的天然产物分子中,存在保持其特殊分子骨架的不对称季碳,是具有特定生理活性的决定性因素．利用ＳＭＰ［Ｓ－（－）－２－ｍｅｔｈｏｘｙｍｅｔｈｙｌ－ｐｙｒｒｏｌｉｄｉｎｅ］作为手性离去基团,通过对映选择加成－消除反应构筑不对称季碳,是...     

Convenient Synthesis of 5-Alkylfuran-2(5H)-ones

A convenient synthesis of 5-alkylfuran-2(5H)-ones are described starting from 3-nitropropanoate and aldehydes, promoted by neutral alumina, in 35–60% overall yields, via a condensation–lactonization–elimination pathway.      

5-苯基-3,5-二乙氧基-2(5H)-呋喃酮的晶体结构

标题化合物C14H16O4的晶体结构用X-射线单晶衍射法测定。晶体属三斜晶系,P空间群,晶胞参数a =8.696(2), b=8.943(2) , c=9.379(2) ?, ( = 69.28(3), ( =76.67(3), ( =80.28(3)o, V=660.8(3) ? 3, Z=2, Mr=248.28, Dx=1.248 g/cm3, F(000)=264, μ(MoK()=0.0851 mm—1。晶体结构用直接法解出,经全矩阵最小二乘法对原子参数进行修正,最终的偏离因子为R=0.061, wR=0.089。标题化合物有2个环：呋喃酮环和苯环。由C(1),C(2),C(3),C(4),O(4)构成的五元呋喃酮环的5个原子较好地处于1个平面上,平均偏差为0.0078?。O(2),O(3) 两个原子与呋喃酮环共平面。呋喃酮环和苯环之间的两面角为79.39o。