2-溴-4’-羟基查尔酮-苯磺酸酯衍生物的合成及抗肿瘤活性

基于药效团拼合原理设计并合成23个未见文献报道的 (E)-4-[3-(2-溴苯基)丙烯酰基]苯基-取代苯磺酸酯衍生物（产率：60.9-80.3%）,通过1HNMR、MS、13CNMR确证了产物结构,采用MTT法以5-氟尿嘧啶和伊马替尼为阳性对照药,以人宫颈癌Hela细胞、人肺癌A549细胞和人慢性粒细胞白血病K562细胞为测试细胞株评价了目标化合物的体外抗肿瘤活性。目标化合物Ⅴp表现出最强的A549细胞增殖抑制活性(半抑制浓度IC50 = 7.53 μmol/L),优于阳性对照药5-氟尿嘧啶(IC50 = 8.1 μmol/L),目标化合物Ⅴt表现出最强的K562细胞增殖抑制活性(IC50 = 4.47 μmol/L),目标化合物Ⅴd表现出最强的Hela细胞增殖抑制活性（IC50 = 4.53 μmol/L）,比阳性对照药5-氟尿嘧啶(IC50 = 13.5 μmol/L)强约3倍。目标化合物Ⅴd对A549细胞（IC50 = 8.0 μmol/L）和K562细胞（IC50 = 7.81 μmol/L）也表现出强的增殖抑制活性,值得进一步深入研究。     

两个三联噻吩基查尔酮衍生物异构体的合成和光谱性质与理论研究

合成了两个三联噻吩基查尔酮衍生物异构体[1-(2,4,6-三甲氧基苯基)-3-(α-三联噻吩-2-基)-2-丙烯-1-酮(3a)和1-(3,4,5-三甲氧基苯基)-3-(α-三联噻吩-2-基)-2-丙烯-1-酮(3b)],用核磁共振谱(NMR)和高分辨质谱(HR-MS)对化合物3a～3b进行了表征.研究了它们的线性光谱...     

本期推荐——咪唑啉酮类系列化合物

2-（1H-1，2，4-三唑-1-基）-5-呋喃亚甲基咪唑啉酮衍生物及杀菌活性,具有杀菌活性的2-（4-甲硫基苯氧基）-5-呋喃亚甲基咪唑啉酮衍生物,具有杀菌活性的2-（4-甲硫基苯氧基）咪唑啉酮衍生物及其制备方法,1，3-二烷基-2-咪唑啉酮类的制备方法,用做抗肿瘤剂的芳磺酰基咪唑啉酮衍生物     

氯甲酸烯丙酯的合成及其在阿维菌素结构改造中的羟基保护作用

采用光气法制备氯甲酸烯丙酯,后处理简单,收率高（94%）。对反应条件进行优化。产品用于阿维菌素结构改造时的5-羟基保护,生成的5-烯丙氧基甲酸酯阿维菌素B1衍生物用于后续的结构改造。预试验显示羟基保护反应完全,在一定条件下去保护快速、彻底。具有较高的实用价值。     

肉桂酰胺衍生物的合成与抗菌活性

为了寻找抗菌候选化合物，在前期研究基础上，对蛇床子素结构进行简化与衍生，在甲醇钠/无水乙醇条件下水解，得到(E)-2-羟基-3-异戊烯基-4-甲氧基肉桂酸（Ⅰ），中间体Ⅰ再与胺缩合制备了17个目标物（Ⅱa～q），经1HNMR、13CNMR和MS对目标物进行了结构确证。体外抗菌活性测试结果表明，结构简化后的衍生物呈现较好的抗菌活性。其中，化合物Ⅱh[(E)-3-(2-羟基-4-甲氧基-3-异戊烯基)苯基-N-(4-氟苄基)丙烯酰胺]和Ⅱp[(E)-3-(2-羟基-4-甲氧基-3-异戊烯基)苯基-N-(4-三氟甲基苄基)丙烯酰胺]的活性最为突出，前者对金黄色葡萄球菌（S. aureus）和耐甲氧西林金黄色葡萄球菌（MRSA）的最小抑菌浓度（MIC）分别为16和32 mg/L，后者对S. aureus和MRSA的MIC分别为8和16 mg/L，两个化合物的抗S. aureus活性与对照药苯唑西林较接近，抗MRSA活性远优于对照药苯唑西林。     

紫檀芪查尔酮衍生物的合成及抗肿瘤活性研究

以紫檀芪为先导化合物，将其酚羟基甲氧基化，引入醛基，并与丹皮酚乙酸通过羟醛缩合反应合成紫檀芪查尔酮苯氧乙酸，再与不同的有机胺反应得到10个目标化合物。所有目标化合物经核磁共振氢谱、质谱进行结构确证。采用MTT法初步评价目标化合物对人肝癌细胞HepG2、人非小细胞肺癌细胞A549、人骨肉瘤细胞U-2OS的体外抗肿瘤活性，同时采用ELISA法检测目标化合物对组蛋白去乙酰化酶(HDAC)的抑制能力。结果表明大部分目标化合物抗肿瘤活性高于紫檀芪，其中化合物(E)-3-(2,4-二甲氧基-6-((E)-4-甲氧基苯乙烯基)苯基)-1-(4-甲氧基-2-(2-吗啉基-2-氧代乙氧基)苯基)丙-2-烯-1-酮(5a)对U-2OS细胞的IC₅₀值达到了(6.10±1.11)μmol/L。同时，该化合物在25μmol/L时，对HDAC1和HDAC2的抑制率可达40%左右。     

微波促进碳酸钾催化一锅法合成2-氨基-3氰基-4-芳基-4H-苯并色烯衍生物

微波辐射下,乙醇溶剂中K₂CO₃催化芳甲醛、丙二腈和α-萘酚（或β-萘酚）三组分一锅法快速合成了一系列2-氨基-3-氰基-4-芳基-4H-苯并[h]色烯或苯并[f]色烯衍生物。以苯甲醛、丙二氰与α-萘酚的反应为模板反应,通过单因素实验方案优化了反应的工艺条件。结果表明：反应物各10 mmol,催化剂K₂CO₃ 1 mmol,溶剂无水乙醇15 ml,采用微波功率500 W,80℃回流反应 5 min,2-氨基-3-氰基-4-苯基-4H-苯并[h]色烯（4a）的收率83.6%。在上述最佳条件下,利用取代苯甲醛代替苯甲醛,4H-苯并[h]色烯衍生物(4)产率为65.8%~89.4%。 利用β-萘酚代替α-萘酚,4H-苯并[f]色烯衍生物(6)产率为67.5%~82.9%,合成产物通过熔点和红外光谱表征其结构。     

4-噻唑酮羧酸衍生物的合成

合成了具有潜在杀菌活性的3-苯基-5-苯亚甲基-2-苯氨基噻唑-4-酮的羧酸衍生物.以邻乙基苯胺为原料,合成中间体N,N′-二（2-乙基苯）硫脲（Ⅰ）和2-（2-乙基）苯基-3-（2-乙基）苯基噻唑-4-酮（Ⅱa）,化合物Ⅱa与不同的底物醛发生缩合反应生成2-（2-乙基）苯基-3-（2-乙基）苯基-5-苯亚甲基噻唑-4-酮（Ⅲ）,化合物Ⅲ经过加成反应和水解反应,得到目标化合物.同时以二苯基硫脲为原料合成一个类似物,共合成3种3-苯基-5-苯亚甲基-2-苯氨基噻唑-4-酮的羧酸衍生物.产物经核磁共振谱、质谱表征,产物纯度采用高效液相色谱法测定,均大于98%.     

2009年公开的农药专利集锦(二)

具有杀虫活性的N-苯基-3-取代氨基吡唑类化合物;具杀虫活性的含氮杂环二氯烯丙醚类化合物;4-乙酰氨基-3-（4-芳基噻唑-2-氨基）苯甲酸酯及其制备方法与应用;制备3-甲基氨基-1-（2-噻吩基）-1-丙醇化合物的方法;具有杀虫活性的邻氨基N-氧基苯甲酰胺类化合物;丝孢类真菌杀螨制剂;     

国内专利文献

一种制备葡萄糖醛酸内酯的酯化及结晶工艺方法；制备纯度超过99．5％的1，6-己二醇；白薇总皂苷及其皂苷化合物在抗炎药物中的应用；生化衍生1，3-丙二醇的氢化；生产直链α-烯烃的方法；芳香族醛的制造方法；1,3-二苯基丙-2-烯-1-酮衍生物的制备；     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料,介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比,介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序,对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。