天然产物(E)-4''''-甲氧基-3,5-二羟基芪的合成研究

以3,5-二羟基苯甲酸为原料,通过乙酰基保护、酰氯化,生成中间体3,5-二乙酰氧基苯甲酰氯,再与4-甲氧基苯乙烯经Heck反应、甲醇钠脱乙酰基保护,得到单一的芪类天然产物标题化合物,产率66%.研究结果对于其他芪类化合物的合成具有指导意义.     

天然产物（E）-4＇-甲氧基-3,5-二羟基芪的合成研究

以3,5-二羟基苯甲酸为原料,通过乙酰基保护、酰氯化,生成中间体3,5-二乙酰氧基苯甲酰氯,再与4-甲氧基苯乙烯经Heck反应、甲醇钠脱乙酰基保护,得到单一的芪类天然产物标题化合物,产率66%.研究结果对于其他芪类化合物的合成具有指导意义.     

天然产物(E)-4′-甲氧基-3,5-二羟基■的合成研究

以3,5-二羟基苯甲酸为原料,通过乙酰基保护、酰氯化,生成中间体3,5-二乙酰氧基苯甲酰氯,再与4-甲氧基苯乙烯经Heck反应、甲醇钠脱乙酰基保护,得到单一的■类天然产物标题化合物,产率66%。研究结果对于其他类化合物的合成具有指导意义。     

固体酸催化合成3,5-二乙酰氧基苯乙烯

以3,5二-羟基苯乙酮(4)为原料,经三步反应制得3,5二-乙酰氧基苯乙烯(1)。在硫酸催化下化合物(4)与乙酸酐反应,得到3,5二-乙酰氧基苯乙酮(3),收率92%,对于化合物(3)进行了1H NMR表征;化合物(3)经催化加氢,得到1-(1羟-基乙基)-3,5二-乙酰氧基苯(2),收率98%,对于化合物(2)进行了1H NMR表征;化合物(2)在固体酸催化下反应得到3,5二-乙酰氧基苯乙烯(1),制备化合物(1)的反应条件为:m[化合物(2)]∶m(固体酸)=5∶1,110℃回流5 h,收率95%,纯度98%,对化合物(1)进行了IR,1H NMR,MS表征,并对化合物(1)的1HNMR,MS表征结果进行了进一步分析。     

白藜芦醇的合成

以3,5-羟基苯乙酮为原料,通过乙酰化、还原、甲磺酰化、烯键化、Heck反应和脱保护6步反应合成了标题化合物,总收率56％.     

4-溴-3,5-二氟苯甲醚的合成及表征

以3,5-二氟苯甲醚为原料,在N-溴代丁二酰亚胺和二甲基甲酰胺体系中经溴化,合成标题化合物,溴化反应对位选择性为91%,产品收率为64%,产物通过IR、1HNMR、13CNMR及MS确证.     

DTPA-双(3,5-二甲氧基-4''''-氨基二苯乙烯)的合成

以3,5-二甲氧基苄溴为起始原料,通过Witting-Hornor反应,再经Fe/HCl还原,合成了3,5-二甲氧基-4'-氨基二苯乙烯.再与DTPAA反应得到标题化合物,其结构经IR、MS、1HNMR、元素分析确证.     

9-O-芴基-β-L-阿拉伯糖苷的合成与表征

在四丁基溴化化铵相转移催化剂的作用下,以二氯甲烷为溶剂,自制的1-溴-2,3’4-三-O-乙酰基-L-阿拉伯糖、9-羟基芴和无水碳酸邛为原料,合成了2,3,4-三-O-乙酰基-9—O-芴基-β-L广阿拉伯糖苷化合物,然后经无水碳酸钾脱去保护基得到标题化合物．总收率达63．9％。     

2-呋喃甲酰基甲基丙氨酸的合成

以廉价的2-乙酰基呋喃为原料,通过溴化、胺化和水解,合成了标题化合物,结构经核磁、质谱确证,讨论了目标化合物的合成方法.此法可用于其他2-呋喃甲酰基甲基氨基酸的合成.     

马蔺子甲素的简易全合成

以3,5-二甲氧基溴苯为原料,经金属化、偶联、脱甲基化、Teuber氧化反应制得标题化合物.总收率74%.目标化合物的结构经核磁共振氢谱及元素分析确证.     

A1H NMR anomaly for steroidal alcohols? Reactions of a steroidal γ-ketoacid

The chemical and spectroscopic properties of several reaction products of 17β-hydroxy-1,3-seco-2-nor-5α-estran-1-oic acid and 17β-hydroxy-1,3-seco-2-nor-4-oxo-5α-estran-1-oic acid were examined and found to be atypical. For instance, the methyl ester of the first acid was resistant to basic hydrolysis conditions but partly hydrolyzed with 100% H₂SO₄. Reduction of the ester by LiA1H₄ gave 1,3-seco-2-nor-5α-estrane-1,17β-diol from which diacetate, ditosylate and 17-monotosylate derivatives were prepared. The C-1 methylene protons of each appeared as a singlet in 60, 100 and/or 270 MHz NMR spectra. The methyl ester and the diacetate of the diol were synthesized by alternate methods to verify the assigned structures. A 470-MHz spectrum eventually resolved the C-1 methylene protons of the monotysylate into the AB portion of an ABX pattern, further confirming the assigned structures. Also, 2,3-seco-1-oxo-5α-estran-17β-ol 17-nitrate was synthesized.     

水溶性席夫碱型大环化合物的合成方法研究

报道以磺基水杨醛、1,3-二氯-2-丙醇为原料,采用超声波催化法合成中间体1,3-双(2'-甲酰-4'-磺酸钠)苯基-1,3二氧-2-丙醇(2),然后中间体(2)再与邻苯二胺反应得到了水溶性席夫碱型大环化合物(3).并对合成中间体1,3-双(2'-甲酰-4'-磺酸钠)苯基-1,3二氧-2-丙醇的超声波催化法与常规加热法...     

阿昔洛韦的合成工艺改进

设计了1条以NaHSO4为催化剂合成阿昔洛韦的新工艺,以醋酐和1,3-二氧戊环为起始原料,合成2-氧杂-1,4-丁二醇二乙酯,然后再与乙酰化后的鸟嘌呤发生缩合制得双乙酰阿昔洛韦,双乙酰阿昔洛韦在Na2CO3水溶液中水解得到目标产物阿昔洛韦。考察了该工艺中反应温度、催化剂用量、溶剂等对反应收率和产品质量的影响。结果表明,在合成关键中间体2-氧杂-1,4-丁二醇二乙酯中,反应温度宜选用60℃;合成双乙酰鸟嘌呤时n（鸟嘌呤）：n（cat）=1.0：0.1为较佳;合成双乙酰阿昔洛韦时选用甲苯作为反应的较佳溶剂。总收率达到79%,并且产物纯度较高,适合工业化生产。     

Ruthenium catalyzed copolymerization of 2-acetylphenanthrene and α,ω-dienes

Summary Copolymers with 2-aceto-1,3-phenanthrenylene units in the chain have been directly prepared by Ru catalyzed step-growth copolymerization of 2-acetyl phenanthrene and ,-dienes such as 1,3-divinyltetramethyldisiloxane. Copolymers which incorporate 2-aceto-1,3-phenanthrenylene units possess higher T_gS and increased thermal stability compared to analogous copolymers which have 2-aceto-5-phenyl-1,3-phenylene(biphenyl) or 2-aceto-1,3-phenylene units. Fluorescence spectra of these copolymers have been obtained.     

端羧基聚乳酸的扩链、改性及其性能

以丙交酯为原料、辛酸亚锡为催化剂、丁二酸酐为改性剂,采用梯度升温法,在150℃、0.098MPa条件下采用直接熔融缩聚法合成端羧基聚乳酸共聚物P(LA/SA),接着用2,2-(1,3-亚苯基)-二 唑啉(1,3-PBO)对其进行扩链,按n(丙交酯)/n(1,3-PBO)= 1/2.4加入1,3-PBO,反应1h制得聚酰胺酯(PEA),最后将高岭土与PEA在150℃、减压条件下熔融复合改性。采用GPC、FTIR、¹H NMR、DSC、SEM等手段对聚合物的结构进行表征和性能测试,结果表明,与P(LA/SA) 相比,扩链产物PEA相对分子质量大幅度提高,重均相对分子质量高达24万,玻璃化转变温度T_g高于PLA和P(LA/SA),改性后复合材料的热稳定性能提高,结晶度降低。     

DNA cleavage activities and mechanism of a novel heterodinuclear macrocyclic complex

A new unsymmetrical bis-furan pendant-armed macrocyclic heterodinuclear Cu(II)Zn(II) complex, [CuZnL(OAc)](ClO₄)·3MeCN·H₂O(1) (H₂L was derived from the condensation between 1,6-bis(2-furyl)-2,5-bis(2-hydroxy-3-formyl-5-bromobenzyl)-2, 5-diazahexane and 1,3-diaminopropane), has been synthesized and characterized by EDS (energy dispersive spectroscopy) and X-ray crystallography determination. The interaction between the complex and calf thymus (CT) DNA was investigated by UV–vis absorption, viscosity experiment, fluorescent and CD spectroscopy. The mechanism of the cleavage of supercoiled DNA (pBR 322DNA) process was also studied. It is proposed that DNA cleavage promoted by the complex occurrence via oxidative mechanism.     

A homochiral Cu(II) coordination polymer built from helical motif based on two V-shaped ligands

By using a V-shaped N-containing ligand and a V-shaped carboxylate ligand, we have successfully synthesized a 3D novel copper homochiral coordination polymer, namely [Cu(OPY)(1,3-bdc)]_n (complex 1), [1,3-H₂bdc = isophthalic acid, OPY = 4,4′-(oxybis(4,1-phenylene))dipyridine]. The compound has been solvothermally synthesized and characterized by IR, elemental analysis, single crystal X-ray diffraction, XRD, UV–vis, and TG analysis. The complex 1 crystallizes in the chiral space group P6₅ and possesses an unprecedented uninodal 3D 7⁵∙ 8 topology. However, the complex was synthesized by achiral materials. The complex 1 displays a moderate SHG response and its SHG efficiency is about 0.3 times that of urea. In addition, the compound shows high thermal stability.     

5-甲酰基-2，4-二甲基-1H-吡咯-3-羧酸的合成与工艺研究

5-甲酰基-2,4-二甲基-1H-吡咯-3-羧酸是抗癌药苹果酸舒尼替尼的重要中间体。以乙酰乙酸叔丁酯为起始原料．依次经过Knorr缩合反应、脱羧反应、Vilsmeier反应、水解反应4步反应合成了目标化合物5-甲酰基．2,4-二甲基-1H-吡咯-3-羧酸,总收率55.4%。并对合成工艺进行了优化,适合于工业化生产。     

Water soluble Ir(III) complexes from sulfonate-modified cyclometalating ligand

Five cyclometalated Ir(III) complexes are synthesized from a sulfonate-modified bis-benzimidazole-type organic ligand (3,3′-(2,2′-(1,3-phenylene)bis(1H–benzo [d]imidazole-2,1-diyl))dipropane-1-sulfonic acid, MBS) with different ancillary ligands, and can be classified into two categories. Namely, complexes 1 and 2 (MBS-Ir-ppy and MBS-Ir-Fppy), which are electroneutral, and complexes 3–5 (MBS-Ir-bpy, MBS-Ir-Mebpy, and MBS-Ir-bpyCOOEt), which are cationic and soluble in water. These Ir(III) complexes show tunable luminescence from cyan to orangish red color in solution and yellowish red to pure red color in solid state, with moderately long lifetime (56–528 ns) and high quantum yield (35–71%).     

抗菌药伦氨苄西林盐酸盐合成

以3 羟基丁酮作为起始原料,经过酰氯化、成环、脱氯化氢、溴化合成4 溴甲基 5 甲基 1,3 二氧戊环 2 酮,再和氨苄青霉素反应合成伦氨苄西林盐酸盐。其含量99%,总收率(以3 羟基丁酮计)37.3%。