含长碳烷基核苷氢亚磷酸酯衍生物的合成与表征

通过将抗病毒药物核苷(3'-叠氮-2',3'-二脱氧胸苷AZT或2',3'-二脱氢-2',3'-二脱氧胸苷d4T)与三氯化磷反应, 然后在不同的醇解试剂作用下, 一锅法合成得到6个含长链烷基的核苷氢亚磷酸二酯衍生物, 并采用³¹P NMR, ¹H NMR, ¹³C NMR和ESI-MS对其结构进行了表征.     

达格列净呋喃环杂质的合成

以5-溴-2-氯-4′-乙氧基二苯甲烷为原料，与2,3-二-O-叔丁基二甲基硅基-5,6-O-异亚丙基-D-葡糖醛酸-1,4-内酯缩合后，再经还原、脱保护、酯化及水解反应合成了达格列净呋喃环杂质--(1S)-1,4-脱水-1-(4-氯-3-(4-乙氧基苄基)苯基)-D-葡萄糖，总收率29.0%，纯度98.5%，其结构经¹H NMR，¹³C NMR， DEPT135，¹H-¹H COSY， HSQC， HMBC和MS(ESI)确证。     

N,N-二[二(3-甲氧基丙基)膦基乙基]-2-乙氧基乙胺盐酸盐的合成

以2-乙氧基乙胺和3-氯-1-丙醇等为起始原料, 经7步反应, 制备了N,N-二[二(3-甲氧基丙基)膦基乙基]-2-乙氧基乙胺(PNP5)盐酸盐, 其中关键步骤是后两步. PNP5盐酸盐的结构和组成通过IR, ¹H NMR, ¹³C NMR, ³¹P NMR, MS和元素分析等方法确认.     

新型2-取代氨基-3-氟-4-吡啶氟硼酸钾盐的合成

以2,3-二氟-5-氯吡啶为原料,依次经取代和还原反应制得2-取代氨基-3-氟吡啶化合物(2a~2g); 2a~2g与正丁基锂及硼酸三异丙酯经有机锂化法制得相应的硼酸化合物(3a~3g); 3a~3g分别与氟化氢钾经取代反应合成了7个新型的2-取代氨基-3-氟-4-吡啶氟硼酸钾盐,其结构经¹H NMR, ¹³C NMR, IR, ESI-MS和元素分析表征。     

2-甲氧基-3-氟-4-碘吡啶的合成

2-甲氧基-3-氟-4-碘吡啶是一个重要的医药化工中间体,其合成路线未见文献报道。以2-甲氧基-3-氟-5-氯吡啶为起始原料,经氢解和碘代两步反应合成标题化合物,总收率62.8%,其结构经¹H NMR, ¹³C NMR和MS确证。     

高海拔大马士革玫瑰的黄酮类化学成分

为研究高海拔种植大马士革玫瑰的化学成分,采用95%乙醇为溶剂进行连续回流提取,并采用硅胶、聚酰胺、C18及Sephadex LH-20凝胶等材料行分离纯化,最终得到了9个黄酮醇类化合物（1, 3, 5～11）和两个黄酮类化合物（2和4）,其结构经¹H NMR和¹³C NMR表征并结合理化方法鉴定为：5,7-二羟基-3,6,4'-二甲氧基黄酮醇（1）、 5,7-二羟基-6,4'-二甲氧基黄酮（2）、 5,7,4'-三羟基-3,6-甲氧基黄酮醇（3）、 5,7-二羟基-6,8,4'-三甲氧基黄酮（4）、 5,4'-二羟基-3,6,7-二甲氧基黄酮醇（5）、 5,7-二羟基-3,6,8,4'-三甲氧基黄酮醇（6）、 8-甲氧基山奈酚（7）、山奈酚（8）、槲皮素（9）、槲皮素 3-O-a-L-阿拉伯呋喃糖苷（10）、银锻苷（11）,其中化合物1～5为首次从蔷薇属植物中分离得到,化合物1～7、 10、 11为首次从大马士革玫瑰中分离得到。      

斑蝥素的常压合成

报道了一种斑蝥素的常压合成方法。以3-氧代-4-甲酸甲酯四氢噻吩为起始原料,经氰基化和腈醇脱水反应制得3-氰基-4-甲酸甲酯-2,5-二氢噻吩(1); 1水解制得2,5-二氢噻吩-3,4-二羧酸(2); 2在二氯亚砜作用下脱水制得关键中间体2,5-二氢噻吩-3,4-二羧酸酐（3）; 3依次经D-A反应和Raney Ni催化加氢的脱硫反应合成了斑蝥素(5),总收率38%,其结构经¹H NMR, ¹³C NMR和MS（ESI）确证。研究了离子液体、反应时间和反应温度对D-A反应的影响。确定D-A反应的较优条件为：[BMIM]·BF₄为离子液体,于35 ℃反应20 h,斑蝥素前体产率为86%。     

新型查尔酮哌嗪衍生物的合成

以4-二甲氨基苯甲醛和2-溴-4′-氟苯乙酮为原料,经缩合和取代反应制得4-二甲氨基-4′-(1-哌嗪基)查尔酮(2); 2与卤代烃反应合成了6个新型的查尔酮哌嗪衍生物,收率71%~88%,其结构经¹H NMR,¹³C NMR和HR-MS表征。     

酒石酸水溶液中绿色合成5-芳基亚甲基-1,3-二噁烷-4,6-二酮衍生物

在酒石酸水溶液中,以芳香醛和1,3-二噁烷-4,6-二酮为原料,合成了14种5-芳基亚甲基-1,3-二噁烷-4,6-二酮衍生物,收率81%～95%,其中4f, 4g, 5f和5g为新化合物,其结构经¹H NMR, ¹³C NMR和MS(ESI)表征。并对反应条件进行了优化,对反应机理进行了探讨。     

钯催化氟代偕二醇的芳基化反应

以醋酸钯、1,1’-联萘-2,2’-双二苯膦(BINAP)为催化剂,二甲苯为溶剂,氟代偕二醇砌块在碳酸钾的作用下,脱三氟乙酸后与溴代芳烃发生芳基化反应,于130℃反应7 h,合成了一系列α-氟代芳基酮类化合物,收率最高可达96%,其结构经¹H NMR,¹³C NMR,¹⁹F NMR和HR-MS(ESI)表征。     

[4+2]-Cyclodimer of sabinone: formation,crystal structure,and NMR spectra

Oxidation of (+)-sabinol, (1S,3R,5S)-1-isopropyl-4-methylidenebicyclo[3.1.0]hexan-3-ol, by active MnO₂ afforded not the expected sabinone but only its [4+2]-cyclodimer. The molecular structure of the latter was established by X-ray diffraction analysis. The ¹H and ¹³C NMR spectra of this cyclodimer were interpreted using 2D NMR spectroscopy.     

NMR Chemical Shift and Quadrupolar Interaction Parameters of Carbon‐Coordinated 27Al in Aluminium Carbide,Al4C3

Aluminium carbide, Al₄C₃, was characterised by ¹³C and ²⁷Al solid‐state NMR spectroscopy. The ¹³C NMR spectra display two resonances with an intensity ratio of 1:2, which is in agreement with the reported crystal structure. The ²⁷Al NMR spectra of Al₄C₃ under both static and MAS conditions were deconvoluted into two spectral components, belonging to the two aluminium species Al1 and Al2 in the crystal structure of Al₄C₃. The spectral fit allowed for determination of the relatively large quadrupolar coupling constants (χ ≈? 16 MHz) of both ²⁷Al species. One aluminium species displayed a tendency of having a χ of slightly smaller magnitude compared to the other. By carrying out DFT calculations of the EFG tensor at the ²⁷Al sites using the Wien2k software, we could tentatively assign the smaller χ site to be the crystallographic Al1 species. Also, the isotropic chemical shift for the carbon‐coordinated aluminium in Al₄C₃ could be determined, being in the range of 111 to 120 ppm. This is somewhat larger than those shift values observed for ²⁷Al in nitrogen coordination.     

Synthesis and Structure of a 1,3-alternate-Thiacalix[4]arene diamide Derivative

A novel receptor possessing two complexation sites and bearing 1,3-alternate conformation based on thiacalix[4]arene, confirmed by single crystal X-ray analysis, was prepared. The tetrathiacalix[4]arene diamide shows strong intramolecular hydrogen bonding. The binding behavior towards K⁺ and halides has been examined by ¹H NMR titration experiments.     

α-氨基膦酸酯衍生物的合成及其表征

合成了一系列N端含有均三唑并噻二唑的α-氨基膦酸酯衍生物, 其结构经过红外、核磁共振氢谱、磷谱、质谱和高分辨质谱等确证.     

Effective synthesis of 5-aryl-3-ethylidene-3H-pyrrol-2-ones

Substituted 5-aryl-3-ethylidene-3H-pyrrol-2-ones were synthesized by the reaction of the corresponding 4-aryl-4-oxobutanoic acids with ketones in the presence of aminating agents. The conditions of this reaction were developed with the use of both the conventional condensation technique and microwave activation. The structures of the reaction products were con-firmed by elemental analysis, IR spectroscopy, and ¹H NMR spectroscopy. Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 693–696, April, 2006.     

Reaction of vinyloxyalkylamines with mercaptoacetic acid

N-[2(3)-Hydroxyalkylj-4-thiazolidinones have been synthesized by the reaction of 2(3)-vinyloxyalkylamines with mercaptoacetic acid in 24–69 % yield. The structure of the compounds obtained was supported by (R and¹H NMR spectroscopic data.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 677–679, March, 1996.     

The structure of products of reaction ofo-phenylenedioxytrichlorophosphorane with arylacetylenes

The products of reaction ofo-phenylenedioxytrichlorophosphorane with arylacetylenes were identified as 4-aryl-2-chloro-2-oxo-5,6-(4-chlorobenzo)phosphorin-3-enes using¹H,¹³C,³¹P NMR, and IR spectroscopy and high-resolution mass spectrometry. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 368–370, February, 1997.     

Synthesis and Stereochemistry of (1S,3S,4S,7R11R)-3-(4-Nitrophenyl)-11-aza-2,6-dioxatricyclo[5,3,1,04,11]undecane

The reaction of (1S,2S)-2-amino-1-(4-nitrophenyl)-1,3-propanediol with glutaraldehyde has been studied. It has been established on the basis of AM1 and PM3 calculations and ¹H NMR spectra recorded in the presence of the shift reagent Eu(fod)₃ that (1S,3S,4S,7R,11R)-3-(4-nitrophenyl)-11-aza-2,6-dioxatricyclo[5,3,1,0^4,11]undecane is formed as the result of the reaction.     

Synthesis and antiemetic activity of 1,2,3,9-tetrahydro-9-methyl-3-(4-substituted-piperazin-1-ylmethyl)-4H-carbazol-4-one derivatives

5-HT₃ receptor antagonists, such as Ondansetron, are used for anti-emesis after chemotherapy, radiotherapy and operations. Some Ondansetron analogs possessing piperazine ring as side chains were synthesized in our lab. Thus, one of the two carbonyl groups of starting material 1,3-cyclohexandione (1) was condensed with phenylhydrazine hydrochloride to form monophenylhydrazone (2). 1,2,3,9-Tetrahydro-4H-carbazol-4-one (3) was prepared from 2 via cyclization and rearranged in the presence of ZnCl₂. Through a methylation reaction, compound 3 was converted to 1,2,3,9-tetrahydro-9-methyl-4H-carbazol-4-one (4). 3-Dimethylaminomethyl substituted compound (5) was synthesized from 4 by a Mannich reaction in glacial acetic acid. Nine novel 1,2,3,9-tetrahydro-9-methyl-3-(4-substituted-piperazin-1-ylmethyl)-4H-carbazol-4-one derivatives (6a–6i) were synthesized through nucleophilic substitution reaction of 5 with piperazines. The structures of all the target compounds were determined by elemental analysis, IR, MS, ¹H NMR and ¹³C NMR spectra. The results of preliminary pharmacological test show that part of the novel compounds have antiemetic activity comparable to that of the control Ondansetron. __________ Translated from Chinese Journal of Organic Chemistry, 2008, 28(2) (in Chinese)     

N-取代苯甲酰基-N'-取代芳基硫脲的合成、晶体结构及生物活性

为了寻找新的高活性农药, 利用工业易得的三氟羧草醚及其中间体为起始原料, 设计合成了9个未见报道的N-取代苯甲酰基-N'-取代芳基硫脲化合物, 结构经IR, ¹H NMR, 元素分析确认. X射线衍射测定了化合物4b的晶体结构, 结果表明: 其分子属于三斜晶系, 空间群P-1, a＝0.51588(19) nm, b＝1.0766(4) nm, c＝2.0596(8) nm, α＝81.113(6)°, β＝89.702(6)°, γ＝78.131(6)°, V＝1.1056(7) nm³, D_c＝1.445 Mg/m³, Z＝2, F(000)＝492, μ＝0.319 mm^－1. 初步生物活性测试结果表明, 部分化合物具有较好的除草活性.