含氨基的金刚烷桥头二取代化合物合成研究

采用金刚烷甲酸为原料,经溴代、叠氮化、库尔提斯重排、水解等四步反应合成了3-氨基-1-金刚烷醇(糖尿病药物中间体),总收率为34%;以金刚烷甲酸为原料,在无需卤素取代下,通过里特反应、水解反应合成了3-氨基-1-金刚烷甲酸盐酸盐(抗肿瘤药物中间体),总收率为73%.采用元素分析、红外光谱、质谱、核磁共振谱等手段对两种产物的进行了结构鉴定,分别提出了可能的反应机理.     

吲哚-2-甲酸和(S)-吲哚啉-2-甲酸的合成和相互转化研究进展

吲哚-2-甲酸和(S)-吲哚啉-2-甲酸均是具有生物活性的天然产物和众多降压药的特征结构片段,报道了它们的合成及其相互转化研究进展.吲哚啉-2-甲酸可由吲哚-2-甲酸还原制得,其中(S)-吲哚啉-2-甲酸可由外消旋体拆分或通过不对称合成法制备,其中"手性源法"作为一种新出现的方法具有较好的前景.吲哚-2-甲酸可由Fischer吲哚合成法制备,或通过取代苯胺或苯甲醛制备,也可通过吲哚啉衍生物氧化脱氢制备,其中Fischer合成法仍具有较强的竞争力.     

4-(4-吗啉)哌啶盐酸盐的合成

4-甲酸乙酯哌啶与溴苄反应,再经酰胺化和氨化反应制得关键中间体4-氨基-1-苄基哌啶(5);5与2,2-二溴二乙醚经环化反应制得N-苄基-4-(4-吗啉)哌啶,再经成盐,加氢合成了4-(4-吗啉)哌啶盐酸盐(1,总收率24.9%),1的结构经1HNMR,IR和GC-MS确认。     

多取代2-吡喃酮-3-甲酸的合成与表征

吡喃酮类衍生物是一类具有生物活性的六元杂环化合物,同时,许多吡喃酮类化合物还是重要的有机合成中间体,广泛应用到医药,农药的合成中。本论文以氢氧化钠为碱,2-二乙硫基亚甲基乙酰乙酰苯胺和丙二腈合成了一系列新型多取代2-吡喃酮-3-甲酸,通过核磁共振、质谱分析对所得化合物的结构进行表征,并对该反应合成机理进行了探讨。该合成方法条件温和、操作安全、收率高。     

取代吲哚-3-甲酸类化合物的合成

吲哚-3-甲酸是一种重要的有机中间体,被广泛应用于医药与农药的合成.以取代邻硝基甲苯为原料,与N,N-二甲基甲酰胺二甲基缩醛(DMFDMA)反应制得取代2-硝基-β-二甲氨基苯乙烯,再经铁粉和冰乙酸还原环合生成取代吲哚,取代吲哚与三氟乙酸酐经酰化、碱性条件下水解制得5种取代吲哚-3-甲酸类化合物,该合成方法操作简单,条件温和,收率较高.     

抗阿尔茨海默病药物盐酸多奈哌齐的合成

以4-哌啶甲酸为原料,经酯化、烷基化、酯水解、酰化、脱水和还原反应合成中间体N-苄基-4-哌啶甲醛8;再以3,4-二甲氧基苯甲醛为原料,经缩合、还原、分子内环化反应合成中间体5,6-二甲氧基-1-茚酮9;最后中间体8和中间体9经缩合、还原反应后成盐合成了抗阿尔茨海默病药物盐酸多奈哌齐,总收率56.8%,其结构经¹H NMR和¹³C NMR确证。该路线具有原料廉价易得、操作简便、反应条件温和、后处理简便、收率较好等优点。      

三光气法合成盐酸罗哌卡因

以三光气为酰氯化剂,2-哌啶甲酸经酰氯化,酰胺化制得1-N-(2,6-二甲基苯基)-2-哌啶甲酰胺(2),收率50.1%(以2-哌啶甲酸计)。以DMF为溶剂,2经丙基化反应合成了盐酸罗哌卡因(1),收率54%。1和2的结构经1H NMR表征。     

6-氨基-3-取代吲哚的合成和生物活性研究

6-氨基-3-取代吲哚及其衍生物是一种重要的医药和有机化工中间体,不仅能合成一些具有生理活性和药理活性的化合物,如:合成一些具有药物活性的色胺类化合物及其衍生物[1,2];合成一些植物生长调节剂,如吲哚-3-乙腈和吲哚-3-乙酸类化合物[3];合成一些具有生物活性的天然化合物Drag     

(E)-6-氯-2-芳乙烯基-3-喹啉甲酸衍生物的合成

以6-氯-2-氯甲基-3-喹啉甲酸乙酯(1)与芳香醛类化合物3a-f′为起始化合物,通过简便有效的“一锅法”反应,合成了(E)-6-氯-2-芳乙烯基-3-喹啉甲酸衍生物4a-f′。所合成的32个化合物4a-f′均未见文献报道,其结构经红外光谱、核磁共振氢谱、核磁共振碳谱和高分辨质谱得以确认。     

微波辐射下水相中3,5-双亚苄基哌啶-4-酮衍生物的合成

利用微波辐射, 以碳酸钾为催化剂, 快速于水相中合成了一系列3,5-双亚苄基哌啶-4-酮衍生物, 所合成化合物的结构经红外光谱、核磁共振光谱和高分辨率质谱予以确证.     

A New Synthesis of 4, 4-Diaryl/Diheteroaryl-3-butenyl Derivatives of Nipecotic Acids as GABA Transporter Inhibitors

A new method for the synthesis of 4, 4-diaryl/diheteroaryl-3-butenyl derivatives of nipecotic acid as GABA transporter inhibitors is described. The key intermediates 4-tosyl-1, 1-diaryl/diheteroaryl-1-butene 10a-d were synthesized by Wittig reaction, and followed by alkylation with （R）-3-piperidinecarboxylate. The resulting N-cycloalkylated amino acid esters 11a-d were saponified and then acidified to get the target compounds 1a-d. The preliminary bioassays showed that la-d exhibited excellent inhibition of [3H]-GABA uptake in vitro of culture cells.     

First asymmetric syntheses of 6-substituted nipecotic acid derivatives

Various nipecotic acid derivatives are known to be potent GABA uptake inhibitors thus being useful in the treatment of a number of neurological and psychological disorders. In this paper, the first asymmetric syntheses of 6-substituted nipecotic acid derivatives are presented. The synthetic strategy was designed to provide access to a large variety of enantiomerically pure 6-substituted nipecotic acid derivatives. The synthesis starts from the chiral N-acyldihydropyridines 15 and 16 obtained via asymmetric electrophilic α-amidoalkylation reaction of a chiral N-acylpyridinium ion. These were utilized for the preparation of enantiomerically pure 6-(4,4-diphenylbutyl)nipecotic acids and 6-(4,4-diphenylbutenyl)nipecotic acids in a multistep synthesis, including the removal of the dimethylphenylsilyl blocking group from the dihydropyridine ring, the reduction of the dihydropyridine heterocycle, a Horner-Wittig reaction and the removal of the chiral auxiliary. The obtained target molecules, however, showed only negligible affinity to the GAT-1- and GAT-3 transport proteins.     

Straightforward synthesis of orthogonally protected piperidin-3-ylmethanamine and piperidin-4-ylmethanamine derivatives

The 1,3- and 1,4-disubstituted piperidines are important building blocks in medicinal chemistry and drug discovery. We present the synthesis of orthogonally protected piperidin-3-ylmethanamine and piperidin-4-ylmethanamine derivatives from commercially available nipecotamide, isonipecotamide, nipecotic acid and isonipecotic acid. This is a straightforward two-step procedure that gives high overall yields. Purification of the intermediates using this procedure is not necessary, and the final compounds are purified by simple flash column chromatography.     

脱氢枞酸及其衍生物生物活性的研究进展

脱氢枞酸是一种从松香中分离出来的具有三环二萜结构的树脂酸,具有广泛的生物活性,在医药、工业、农业等领域具有重要的用途。本文综述了脱氢枞酸衍生物在抑菌、抗病毒、K离子通道开启、抗肿瘤等生物活性方面的研究进展,展望了脱氢枞酸衍生物的研究和应用前景。     

磷钨杂多酸一步法催化合成芳香基脂肪酸

 首次提出用杂多酸为催化剂,利用芳烃及其衍生物和不饱和酸的傅-克烷基化反应一步合成相应的芳基脂肪酸,缩短了合成路线,同时避免了以往非绿色化的AlCl3催化合成.     

桦木酸及其衍生物的制备与抗肿瘤作用的研究进展

桦木酸是一种羽扇豆烷型的五环三萜类化合物,因具有显著的抗肿瘤和抗HIV病毒特性而受到人们关注。桦木酸存在于多种植物中,可以用提取法得到,但由于桦木酸在植物中含量低,其主要来源是由合成法得到。许多桦木酸衍生物也具有抗肿瘤活性。本文介绍了桦木酸的提取与合成等制备方法,以及几种桦木酸衍生物的合成路线,并对桦木酸及其衍生物的抗肿瘤途径和机理进行了概述。     

Facile enantioseparation and recognition of mandelic acid and its derivatives in self‐assembly interaction with chiral ionic liquids

Mandelic acid and its derivatives are important medical intermediates in the pharmaceutical industry. Different stereoisomers exhibited distinct biological properties to human bodies. Given that, enantioselective recognition and separation of mandelic acid are of great importance. In this study, four novel different types of chiral ionic liquids bearing designed functional groups were synthesized and successful enantioselective precipitation with mandelic acid and its derivatives. That is, (R, R)‐chiral ionic liquid 1 can coprecipitated with S‐mandelic acid and its derivatives was observed. In addition, good correlation coefficient is achieved by using electrospray mass spectrum at negative ion pattern for quick analysis of the enantioselective precipitation, which could be served as a method of enantioselective recognition. The possible intermolecular interactions are established after systematical studies by NMR spectroscopy and DFT calculations.     

合成丙二酸亚异丙酯Mannich碱的新方法

以甲醛和胺作为胺甲基化试剂，合成了丙二酸亚异丙酯及其5－单取代烃基衍 生物的Mannich碱，同时还讨论了这些Mannich碱的化学性质。     

Reactions of levulinic acid and pseudolevulinic esters with various C-nucleophiles

The reactions of levulinic acid and its pseudo esters, which are readily available from carbohydrate-containing raw materials, with various C-nucleophiles are described. Different reaction pathways were demonstrated depending on the nature of the leaving groups and nucleophiles. For 5-methyl-5-methoxydihydrofuran-2(3H)-one, the reaction was found to proceed by a route giving hept-6-enoic acid derivatives. In contrast, the reaction of 2-methyl-5-oxotetrahydrofuran-2-yl acetate proceeds via intramolecular cyclization to form γ-valerolactone derivatives.