2-异丙基-1,3-二氢-4(1H)异喹啉酮及其衍生物的合成

报道了异喹啉酮与格氏试剂反应合成四氢-4-羟基异喹啉酮化合物,NBS和混酸(HNO~3/HAc)与异喹啉酮反应合成异喹啉酮衍生物。6个新化合物的结构,通过元素分析,红外光谱和核磁共振氢谱,质谱给予证实。     

Friedlander反应合成2-(2-羟基苯基)-6,7-亚甲二氧基喹啉及其衍生物

以6-氨基胡椒醛为原料,与邻羟基苯乙酮(2a),4-氯-2-羟基苯乙酮(2b)发生Friedlander缩合反应,得到新的喹啉衍生物2-(2-羟基苯基)-6,7-亚甲二氧基喹啉(3a)和2-(5-氯-2-羟基苯基)-6,7-亚甲二氧基喹啉(3b),新的喹啉衍生物3a～3b分别经IR红外光谱,1H NMR核磁共振谱,MS质谱,元素分析予以证实.     

2-乙烯基硝基苯-8-羟基喹啉锌配合物的合成及紫外、荧光性质研究

设计合成了3种8-羟基喹啉衍生物配体:(E)-2-[2-(2-硝基苯基)乙烯基]-8-羟基喹啉(4a),(E)-2-[2-(3-硝基苯基)乙烯基]-8-羟基喹啉(4b),(E)-2-[2-(4-硝基苯基)乙烯基]-8-羟基喹啉(4c)及其相应的锌配合物5a～5c,产物经1H NMR,IR,MS和元素分析技术进行了结构表征.通过紫外滴定模拟了金属锌与配体的配位过程,分别测定了它们固态和溶液状态下的荧光性质:光谱显示化合物5a～5c固体荧光光谱的λmax分别是596,625,592 nm,在DMF溶液中的λmax分别是562,536,618 nm.荧光光谱显示硝基位置的改变可以调控8-羟基喹啉锌配合物的发光性质.     

4-氨基-6-硝基-3-溴喹啉的合成

喹啉衍生物是一类重要的杂环类药物,其中4-氨基喹啉衍生物可以作为痛敏肽拮抗剂,而4-氨基-6-硝基-3-溴喹啉是制备4-氨基喹啉衍生物的前体。本文以4-硝基喹啉N-氧化物为原料,在醋酸的作用下,经铁粉还原反应生成4-氨基喹啉;再经溴代反应生成4-氨基-3-溴喹啉;最后经混酸硝化反应生成4-氨基-6-硝基-3-溴喹啉。化合物结构用1H-NMR、13C-NMR、IR、MS表征。     

3-乙基-2-丙基喹啉衍生物的合成工艺研究

以芳胺和正丁醛为原料,对甲基苯磺酸(TsOH)为促进剂,采用"一锅法"合成了3-乙基-2-丙基喹啉衍生物,系统地考察了原料比例、溶剂以及芳胺上取代基对反应的影响,比较了不同的质子酸促进剂对喹啉衍生物产率以及选择性的影响,并对产物进行了核磁共振表征.实验结果表明当用对甲基苯磺酸(TsOH)为促进剂时,3乙基-2-丙基喹啉收率可达到59%,同时生成40%N-丁基苯胺;磷钼酸、浓硫酸也可以选择性地得到喹啉衍生物,但收率较低,分别只有28%和24%.同时,考察了苯胺环上取代基对喹啉收率的影响,当苯环上有供电子基时,有利于喹啉的生成,而吸电子基则不利于喹啉的生成.并推测了反应机理.     

N-(1-异喹啉)硫代亚胺碳酸乙酯荧光光谱的pH效应研究

本文合成了一种新的1位取代的异喹啉衍生物的脲类似物, 发现该化合物的荧光性质随溶液酸碱度的变化十分敏感. 详细研究该化合物的荧光光谱与溶液pH的相关性, 将有助于了解和阐明异喹啉衍生物的脲类似物的激发态光物理行为, 为进一步研究其它异喹啉衍生物的脲类似物及其配合物的光学性质提供理论依据.     

Friedlnder反应合成2-(2-羟基苯基)-6,7-亚甲二氧基喹啉及其衍生物

以 6 氨基胡椒醛为原料 ,与邻羟基苯乙酮 (2a) ,4 氯 2 羟基苯乙酮 (2b)发生Friedl nder缩合反应 ,得到新的喹啉衍生物 2 (2 羟基苯基 ) 6 ,7 亚甲二氧基喹啉 (3a)和 2 (5 氯 2 羟基苯基 ) 6 ,7 亚甲二氧基喹啉 (3b) .新的喹啉衍生物 3a～ 3b分别经IR红外光谱 ,1 HNMR核磁共振谱 ,MS质谱 ,元素分析予以证实     

2-异丙基-3-乙氧甲酰基-1,2,3,4-四氢异喹啉-4-酮衍生物的合成

报道了利用3-乙氧甲酰基异喹啉-4-酮分别与胍、脒、脲及硫脲类化合物缩合 反应合成异喹啉并嘧啶衍生物，邻氨基苯甲醛、邻氨基胡椒醛分别与异喹啉-4-酮 反应合成异喹啉并喹啉化合物．6个新化合物的结构通过元素分析、红外光谱、核 磁共振氢谱和质谱予以证实．     

2-苄基-1,3-二氢-4-异喹啉酮及其衍生物的合成

本文合成了2-苄基-1,3-二氢-4-异喹啉酮的四种3-位亚甲基取代衍生物，四种氧酰基肟和两种6-苄基-5H-异喹啉并[4,3-b]喹啉衍生物。新化合物的结构经元素分析、红外光谱、核磁共振谱证实。     

6-氟-2,4-二苯基喹啉的合成与晶体结构

合成了一种新的喹啉衍生物6-氟-2,4-二苯基喹啉(FDPQ),并且测定了该化合物的晶体结构.该晶体属于单斜晶系,P2(1)/c空间群.     

Triazole-gold (TAAu) catalyzed three-component coupling (A3 reaction) towards the synthesis of 2, 4-disubstituted quinoline derivatives

A gold-catalyzed three-component coupling reaction (A3 reaction) was developed as an efficient approach for the synthesis of challenging 2,4-disubstituted quinoline derivatives. Compared to previously reported Cu/Au bi-catalyst system, this protocol enables achieving A3 reaction only in the presence of triazole-gold catalyst. Notably, 4-alkyl substituted or 2-alkyl substituted quinoline derivatives were obtained with good yields, which highlighted the unique advantage of this new strategy.     

Pyrimidines

It is shown that it is possible to use heterocyclic ketones to synthesize condensed pyrimidine derivatives in the case of 1-(p-toluenesulfo)-1,2,3,4-tetrahydroquinol-4-one, which on reaction with benzylidenebisurea gives 2-hydroxy-4-phenyl-6-(p-toluenesulfo)-3, 4, 5, 6-tetrahydropyrimido [5,4-c] quinoline, and the latter, after dehydrogenation via the 2-hydroxy, 2-chloro derivatives, was converted to 4-phenylpyrimido [5, 4-c] quinoline, a new heterocyclic system.For Part IV see [13].     

Facile Construction of Quinoline‐2‐carboxylate Esters through Aerobic Oxidation of Alkyl 4‐Anilinocrotonates Induced by a Radical Cation Salt

A facile construction of quinoline‐2‐carboxylate esters through an aerobic oxidation of alkyl 4‐anilinocrotonates is described. In the presence of dioxygen, sp³ C−H bonds in 4‐anilinocrotonates can easily be oxidized by using a catalytic amount of a radical cation salt, providing a radical intermediate. After further oxidation and domino cyclization, the desired quinoline derivatives were afforded in high yields. This reaction provides a new way to construct the pharmaceutically relevant quinoline skeleton, avoiding harsh reaction conditions and tedious starting material synthesis.     

四苯乙烯和三苯乙烯修饰的8-羟基喹啉聚集诱导发光特性研究

将2-甲基-8-羟基喹啉与四苯乙烯或三苯乙烯基团结合,合成了两种新型喹啉衍生物(4-Br-TPE-8HQ及TriPE-8HQ),并对其进行了光物理性能研究。结果发现,连接有四苯乙烯的喹啉衍生物能够体现聚集诱导发光(AIE)特性,而连接三苯乙烯的喹啉衍生物却显示温和的聚集诱导猝灭(ACQ)效应,实现了通过功能基团来调节目标分子聚集诱导效应的目的。研究发现,不同体系下分子的整体平面性有所不同,其中三苯乙烯修饰的衍生物在溶液中的荧光寿命(0.55 ns)高于固体荧光寿命(0.43 ns);循环伏安法证明两者具有良好的电化学稳定性,计算得到的4-Br-TPE-8HQ和TriPE-8HQ的LUMO能级分别为-2.40 eV和-2.43 eV,表明为两个化合物注入电子是可行的。     

异色满酮-4及其衍生物的合成(Ⅳ)——辛可宁酸类似物的合成

由异色满酮-4(1)与邻氨基苯甲醛或邻氨基胡椒醛进行Friedlender缩合反应得到异色满并喹啉衍生物异色满并[4,3-b]喹啉(2)和9,10-亚甲二氧基异色满并[4,3-b]喹啉(3).     

Synthesis and Structure Characterization of 1,5‐Benzothiazepine Derivatives Bearing Quinoline Moiety

A series of 1,5‐benzothiazepine derivatives bearing quinoline moiety were obtained by 1,5‐benzothiazepine containing 2‐phensulfanyl‐quinoline ( 4a , 4b , 4c ) with equimolar amounts of benzohydroximinoyl chlorides 5 in CH₂Cl₂ at room temperature. Structures of new compounds were confirmed by elemental analysis, IR, ¹H‐NMR, MS, and X‐ray diffraction analysis.     

Design,synthesis and exploration of in silico α-amylase and α-glucosidase binding studies of pyrrolidine-appended quinoline-constrained compounds

Research on Chemical Intermediates - A series of new pyrrolidine-appended phenoxy-substituted quinoline derivatives were synthesized using 2-chloro-3-formyl quinoline. Initially, the second...     

Molecular iodine catalyzed synthesis of tetrazolo[1,5-a]-quinoline based imidazoles as a new class of antimicrobial and antituberculosis agents

A series of some new tetrazolo[1,5-a]quinoline based tetrasubstituted imidazole derivatives 6a-1 have been synthesized by a reaction of tetrazolo[1,5-a]quinoline-4-carbaldehyde 3a-d,benzil 4,aromatic amine 5a-c and ammonium acetate in the presence of iodine through one-pot multi-component reaction(MCR) approach.All the derivatives were screened for antimicrobial and antituberculosis activities and results worth further investigations.     

Easily synthesized antimalarial ferrocene triazacyclononane quinoline conjugates

Starting from triazacyclononane, easily accessible ferrocenic quinoline derivatives were synthesized. Their antiplasmodial properties were investigated against chloroquine sensitive (HB3) and chloroquine-resistant (Dd2) Plasmodium falciparum. One of them, 7-chloro-4-[4-(7-chloro-4-quinolyl)-7-ferrocenylmethyl-1,4,7- triazacyclononan-1-yl]quinoline (4) showed potent antimalarial activity in vitro against the chloroquine-resistant strain Dd2 and therefore revealed to be the most promising lead from the present work for new organometallic antimalarial agents.