香豆素-3-羧酸-烟酸前药的设计、合成及抗血小板聚集活性的研究

设计、合成香豆素-3-羧酸-烟酸前药并研究其抗血小板聚集活性,以发现活性更高的新型抗血小板聚集剂。利用拼合原理,以不同的连接桥将香豆素-3-羧酸和烟酸偶联,合成目标化合物。通过体外抗血小板聚集试验对目标化合物进行抗血小板聚集活性评价。设计、合成了5个新的目标化合物,其结构经ESI-MS、IR及1 H NMR确证。体外抗血小板聚集活性结果表明,目标化合物的抗血小板聚集活性均强于阳性对照药阿司匹林,其中化合物6a的活性最强,值得进一步研究。     

NO供体型丹皮酚衍生物的合成及其生物活性研究

以丹皮酚与溴乙酸为原料制备丹皮酚乙酸,利用其羧基与不同碳数的二溴烷烃反应得到相应的丹皮酚乙酸溴代烷基酯(3a~3e),再与硝酸银反应生成目标化合物NO供体型丹皮酚衍生物4a~4e。目标化合物的结构经过红外光谱、核磁共振氢谱和质谱确证。对合成的NO供体型丹皮酚衍生物进行体外抗血小板聚集及体内调血脂作用的生物活性测试,结果表明,目标化合物均具有一定的体外抗血小板聚集活性及较强的体内降脂作用,其中化合物4c的活性最强。     

4-色满酮芳环Mannich碱类化合物的合成及其抗血小板聚集活性研究

4-色满酮类化合物和色酮类化合物具有广泛的生物活性。笔者曾发现4-色满酮3位Mannich碱类化合物具有显著的抗血小板聚集活性,为了考察在4-色满酮的3-位Mannich碱类化合物中3-位胺甲基侧链是否为加强活性的必需基团,为确定其药效构象提供信息,笔者设计合成了4种4-色满酮芳环Mannich碱类化合物,同时又合成了3种色酮芳环Mannich碱类化合物。所合成的目标化合物均未见文献报道,其组成和结构经红外光谱、质谱和核磁共振氢谱确认。采用Born's比浊法对目标化合物进行了抗血小板聚集活性的体外筛选。实验结果表明,目标化合物对ADP和胶原诱导的家兔血小板聚集均具有显著的体外抑制活性。     

4-色满酮曼尼希碱类化合物的合成及其抗血小板聚集活性

4-色满酮类化合物具有广泛的生物活性。为了考察4-色满酮类化合物的抗血小板聚集活性构效关系,笔者设计合成了10种4-色满酮Mannich碱类化合物,其组成和结构经熔点、红外光谱和核磁共振氢谱确证,其中6个(5d～5g,5i～5j)目标化合物均未见文献报道。采用Born's比浊法对目标化合物进行了抗血小板聚集活性的体外筛选,实验结果表明,目标化合物对二磷酸腺苷(ADP)诱导的家兔血小板聚集均具有显著的体外抑制活性。     

丹皮酚席夫碱衍生物的合成及其生物活性研究

以丹皮酚与甘氨酸为原料制备含席夫碱结构的丹皮酚中间体,利用其羧基与不同碳数的二溴烷烃反应得到相应的丹皮酚亚胺基乙酸溴代烷基酯衍生物3a～3e,再与硝酸银反应生成丹皮酚硝酸酯衍生物4a～4e。化合物4a～4e的结构经过红外光谱、核磁共振氢谱和质谱表证。对合成的丹皮酚硝酸酯类衍生物进行体外抗血小板聚集及体内调血脂作用的生物活性测试,结果表明,化合物4a～4e均具有一定的体外抗血小板聚集活性及较强的体内降脂作用。     

含二茂铁基的哒嗪酮类化合物的合成

以二茂铁、丁二酸酐等原料合成了两个含二茂铁基的哒嗪酮类化合物,它们的结构经核磁共振氢谱确证,并对合成的化合物进行了抗血小板聚集活性的体外筛选,有一定的活性。     

丹皮酚曼尼希碱衍生物的合成及抗血小板聚集活性

以丹皮酚为起始原料，以体积分数为95%乙醇水溶液为溶剂，与多聚甲醛和有机胺经Mannich反应得到得到丹皮酚曼尼希碱衍生物2a～2e。目标化合物2a～2e经红外、核磁共振氢谱和高分辨质谱表证。体外抗血小板聚集活性测试结果表明，所得目标化合物2a～2e对二磷酸腺苷(ADP)和胶原(collagen)所诱导的血小板聚集均具有较强的抑制活性，且明显优于阳性对照药阿司匹林。     

烃基丹皮酚肟化合物的合成及抗血小板聚集活性

为探究丹皮酚2-位羟基不同烃基取代对抗血小板聚集活性的影响,合成了 7个不同烃基取代的丹皮酚肟衍生物3a～3g并测试了体外抗血小板聚集活性.以丹皮酚为原料,与不同的溴代烃在碱性条件下反应,得到烃基丹皮酚醚,再将其酮羰基肟化,得到7个烃基丹皮酚肟衍生物.目标化合物3a～3g的结构经过红外光谱、核磁共振氢谱和高分辨质谱确证...     

3,4-二氢-4-(1-哌啶甲基)-5H-1-苯并氧杂-5-酮盐酸盐的合成及其生物活性研究

α,β-不饱和环戊酮的Mannich碱和α,β-不饱和环己酮的Mannich碱具有显著的抗炎活性,为了寻求新的具有抗炎活性的环酮类化合物,设计了3,4-二氢-4-(1-哌啶甲基)-5H-1-苯并氧杂-5-酮盐酸盐作为目标化合物。以苯酚、γ-丁内酯、甲醛和哌啶等原料合成了目标化合物,并利用熔点、红外光谱、核磁共振氢谱等手段确定了其结构。采用二甲苯致小鼠耳肿胀法,测定了该化合物的抗炎活性,实验结果表明在200mg/kg剂量下该化合物对二甲苯所致小鼠耳肿胀的抑制率为54.5%。采用Born's比浊法测定了该化合物的抗血小板聚集活性,实验结果表明该化合物的抗血小板聚集活性比噻氯匹啶强约23倍。     

香豆素硝酸酯类衍生物的合成及抗血小板聚集活性

以间苯二酚与乙酰乙酸乙酯为原料制备4-甲基-7-羟基香豆素,利用其7位羟基与二溴烷烃反应得到4-甲基-7-溴烷氧基香豆素,再将其与硝酸银反应得到5个香豆素硝酸酯类衍生物。目标化合物经红外光谱、核磁共振氢谱、质谱表证。体外抗血小板聚集活性测试结果表明,化合物4-甲基-7-硝氧烷氧基香豆素(4a~4e)对二磷酸腺苷(ADP)所诱导的血小板聚集均具有较强的抑制活性,其IC_(50)值为0.012~0.046mmol,强于阳性对照药阿司匹林(IC_(50)值为0.052mmol)。     

吡啶甲酸的合成及其用途

吡啶甲酸包括异烟酸、烟酸和2-吡啶甲酸。总结了异烟酸及其同分异构体的性能和主要用途,论述了氧化剂氧化法、催化氧化法和电氧化法合成异烟酸及其同分异构体的研究现状与最新进展,展望了采用电化学原位谱学技术从分子水平研究、表征吡啶甲酸电合成反应机理,建立电合成吡啶甲酸新思路的前景。     

Two novel lead-carboxylate complexes based on nicotinic acid N-oxide: Synthesis,crystal structures and luminescent properties

Two new lead-carboxylate complexes based on nicotinic acid N-oxide ligand, [Pb(NNO)(FA)_0.5] (1) (HNNO = nicotinic acid N-oxide, FA = fumaric acid) and [Pb₂(NNO)(BTC)] (2) (H₃BTC = 1,3,5-benzenetricarboxylic acid) were hydrothermally synthesized and characterized by the elemental analyses, IR spectra and single crystal X-ray diffraction. Significant phosphorescent properties of two compounds were observed at room temperature.     

硫酸葫芦巴碱的合成工艺研究

以烟酸和硫酸二甲酯为原料合成葫芦巴碱,并与硫酸成盐。对氢氧化钠用量,硫酸二甲酯用量,反应温度三因素进行考察得出最优工艺条件。结果最佳工艺条件为n(NaOH)∶n(烟酸)=2.2∶1,n(硫酸二甲酯)∶n(烟酸)=1.3∶1(摩尔比),反应温度45~50℃,反应时间4 h。硫酸葫芦巴碱的收率达92%以上,纯度98.47%。     

N,N-二甲基-2-巯基烟酰胺的合成研究

N,N-二甲基-2-巯基烟酰胺是重要的医药和农药中间体.本文以2-氯烟酸为起始原料,经过酰化、胺解、取代,合成了N,N-二甲基-2-巯基烟酰胺,总收率60%以上.     

Synthesis of Analogues of Gingerol and Shogaol,the Active Pungent Principles from the Rhizomes of Zingiber officinale and Evaluation of Their Anti-Platelet Aggregation Effects

The present study was aimed at discovering novel biologically active compounds based on the skeletons of gingerol and shogaol, the pungent principles from the rhizomes of Zingiber officinale. Therefore, eight groups of analogues were synthesized and examined for their inhibitory activities of platelet aggregation induced by arachidonic acid, collagen, platelet activating factor, and thrombin. Among the tested compounds, [6]-paradol (5b) exhibited the most significant anti-platelet aggregation activity. It was the most potent candidate, which could be used in further investigation to explore new drug leads.     

Synthesis and spectroelectrochemistry of new phthalocyanines with ester functionalities

Metal-free (H₂Pc) and metallophthalocyanines (MPc; M: Co, Zn) with four n-pentyl ester of thioglycolic acid groups have been synthesized by the esterification of the corresponding carboxylic acid derivatives with n-pentanol. The novel phthalocyanine compounds were characterized by elemental analyses, mass, FT-IR and UV-Vis spectral data. The aggregation investigations carried out in different concentrations and solvents indicate that ester substituted metal-free and metallo-phthalocyanine compounds have not shown any aggregation behavior in the concentration range of about 10⁻⁵ M. Electrochemical and in-situ spectroelectrochemical measurements give common MPc based redox behaviors which supported the proposed structure of the complexes. While CoPc gives both metal-based and ring-based redox processes, H₂Pc and ZnPc give only ring-based electron transfer processes. In-situ electrocolorimetric method was applied to investigate the color of the electro-generated anionic and cationic forms of the complexes.     

创新药烟酸己替胺碱的合成

以环氧乙烷为起始原料,经与甲胺水溶液进行加成反应,再与环氧氯丙烷进行烷基化反应后同时水解反应,而后与茶碱缩合反应,再与5-氧代-1-溴己烷烷基化,最后与烟酸成盐共五步反应合成得到创新药烟酸己替胺碱,并进行质谱和核磁共振氢谱的结构表征,该方法原料易得,反应条件温和,危险性小,后处理简单,易操作、产率高及易工业化的特点。     

Aggregation pheromone system of nymphal gregarious desert locust,Schistocerca gregaria (forskål)

Hexanal, octanal, nonanal, decanal, hexanoic acid, octanoic acid, nonanoic acid, and decanoic acid were identified in the volatile emissions from fifth instars ofSchistocerca gregaria by coupled gas chromatography-electroantennography (GC-EAD) detection and coupled GC-mass spectrometry (MS). In laboratory assays, synthetic blends of the eight compounds, with acids and aldehydes tested separately, evoked strong aggregation responses from fifth instars, similar to responses evoked by a crude volatile extract of the nymphs. A nymphal fecal volatile phenolic blend of guaiacol and phenol, which we have previously shown to evoke an aggregative response from different stages of the insect, significantly synergized the activity of the blend of eight compounds, suggesting mutually augmentative roles for nymphal and fecal volatiles in evoking aggregation. These results indicate that the aggregation behavior of gregarious second to fifth instars is modulated by three sets of pheromonal compounds: aldehydes and acids emitted by the nymphs themselves and phenols associated with their feces.     

血脂调节药依托贝特的合成

以2-(4-氯苯氧基)-2-甲基丙酸为起始原料,与1,2-乙二醇在磷酸和对甲苯磺酸作用下,120℃温度下反应3 h,生成酯后,再与烟酰氯反应合成目标物依托贝特,通过红外光谱及元素分析确证其结构.