噻唑腙1-(1-苯基乙酰基)-2-(噻唑[5,4-b]吡啶基)肼的合成及结构表征

文章从2-氯-3-氨基吡啶出发,经四步反应合成了一个含噻唑的腙类化合物1-(1-苯基乙酰基)-2-(噻唑[5,4-b]吡啶基)肼,并通过红外、核磁及X-射线单晶衍射等表征了该化合物的结构。该化合物的晶体属单斜晶系,P2(1)/c空间群,晶胞参数:a=11.671(8)?,b=9.435(6)?,c=13.120(9)?,β=116.340(6)°,V=1294.7(15)?3,Z=4,Dc=1.377 mg/m3,R1=0.0406。该化合物通过分子间氢键作用形成一维链状结构。     

有机锡化合物(o-FC6H4CH2)2SnCl2的合成、表征及晶体结构

利用邻氟苄基氯和锡反应,合成了有机锡化合物(o-FC6H4CH2)2SnCl2。通过元素分析、红外光谱和核磁共振氢谱对其结构进行了表征。用X-射线单晶衍射测定了该化合物的晶体和分子结构。化合物晶体为单斜晶系,空间群C2/c,a=23.794(17),b=4.85(2),c=12.744(9),β=93.880(10)°,V=1467.8(18)3,Z=4,Dc=1.845Mg/m3,μ=2.109mm-1,R=0.0255,wR=0.0738。锡原子呈畸变四面体构型。通过化合物分子间Sn…Cl作用,形成一维链状结构。     

四氢苯并[4,5]噻吩并[2,3-d]嘧啶含氟衍生物的合成、晶体结构及抗肿瘤活性

以环己酮、丙二腈和单质硫为起始原料,通过改良的Gewald反应合成2-氨基-3-氰基-4,5,6,7-四氢苯并[b]噻吩(Ⅰ),再与三氟乙酸、三氯氧磷反应"一锅法"直接制得4-氯-2-三氟甲基-5,6,7,8-四氢苯并[4,5]噻吩并[2,3-d]嘧啶,然后与取代苄胺反应合成13个噻吩并[2,3-d]嘧啶类含氟衍生物,收率为69%~83%。目标化合物的结构经1HNMR、IR、MS和元素分析方法进行表征。并采用X射线单晶衍射测定化合物Ⅲa的晶体结构,结果表明,该化合物晶体属单斜晶系,空间群为C2/c,a=2.695 9(4)nm,b=0.772 45(13)nm,c=1.688 5(3)nm,α=90°,β=109.320(2)°,γ=90°,V=3.318 2(9)nm3,Z=8,Dc=1.455×106g·m-3,μ=0.23 mm-1,F(000)=1 504,R1=0.057 9,wR2=0.160 4。初步的生物活性实验表明,部分化合物表现出良好的抗肿瘤活性,其中化合物Ⅲc、Ⅲf和Ⅲj对Hep G2和MCF-7细胞的抑制活性高于阳性对照样吉非替尼。     

N-杂环卡宾银配合物的合成与表征

由N-杂环卡宾配体L(L=1,3-双(苄基)苯并咪唑盐酸盐)与Ag2O反应,得到银卡宾配合物(1),通过核磁、元素分析对化合物进行全面表征。并采用溶剂挥发法得到化合物(1)的单晶,利用X-射线单晶衍射测定和研究了化合物(1)的晶体结构,晶体结构数据:单斜晶系,空间群P2(1)/c,a=9.144(8),b=9.518(9)°,c=20.789(19)°,α=90°,β=94.307(13)°,γ=90°,Z=4,V=1804(3)3。     

肉桂醛-2-呋喃甲酰腙钴配合物的合成、晶体结构及热稳定性

以肉桂醛-2-呋喃甲酰腙与Co Cl2·6H2O为原料,在不同的反应条件下合成得到两个钴配合物,并通过FTIR、热重分析、X-射线单晶衍射等手段对其进行了表征。X-射线单晶衍射结果表明:两个配合物均为四角双锥构型,属单斜晶系。配合物Co(L)2(H2O)2属P21/c空间群,晶胞参数为a=1.706 2(2)nm,b=1.059 17(13)nm,c=0.742 00(9)nm;β=101.738(2)°,V=1.312 9(3)nm3,Z=2。配合物Co(L)2(Imz)2属C2/c空间群,晶胞参数为a=2.481 4(2)nm,b=0.848 96(8)nm,c=1.936 96(18)nm;β=121.132 0(10)°,V=3.492 7(6)nm3,Z=4。热重分析表明,两个配合物均有较高的热稳定性。     

(NH_4)_6[CO_2Mo_(10)O_(38)H_4]·11H_2O的一步合成、表征及晶体结构

以30%H2O2作为氧化剂,(NH4)6Mo7O24·6H2O和CoCl2在水溶液中反应一步合成得到了含三价钴的钼酸盐(NH4)6[CO2Mo10O38H4]·11H2O,并对其进行了单晶结构测定、红外光谱和紫外可见光谱表征。晶体学参数为:单斜晶系,P2(1)空间群,a=10.826(7),b=12.258(9),c=15.548(10),β=95.475(10)°,V=2053.7(2)3,Z=4,D c=3.01 g·cm-3,R1=0.0257,wR2=0.0656(I2σ),GOF=1.082。     

2,4-二硝基咪唑铜配合物[Cu(DNI)2(H2O)]·3H2O的制备和晶体结构

通过2,4-二硝基咪唑(2,4-DNI)钠盐的水溶液与硫酸铜的水溶液反应,制备出2,4-二硝基咪唑铜配合物;采用自然挥发法培养出了适于X光结构测定的单晶,X射线衍射测定结果显示,晶体属三斜晶系,空间群为P-1,晶体学参数为:a=7.2560(10)×10-1 nm,b=7.762(2)×10-1 nm, c=16.685(3)×10-1 nm ,α=87.13(3)°,β=83.81(3)°, γ＝62.25(3)°,V=826.8(3)×10-3 nm3,Z=2,Dc=1.871 g · cm-3,μ=1.411 mm-1,F(0 00)=470,最终偏离因子R为0.0388.根据红外光谱、元素分析和X射线衍射分析结果, 确定2,4-二硝基咪唑铜配合物的化学组成为C6H10CuN8O13;分子结构式为[Cu(DNI)2(H2O)2]·3H2O.     

美他卡韦乙醇溶剂化合物的晶体结构

通过美他卡韦在乙醇中重结晶获得2-氨基-6-甲氧基-9-(2,3-双脱氧-2,3-双氢-β-D-阿拉伯呋喃糖基)-9H-嘌呤乙醇溶剂化合物,其结构经X-射线单晶衍射仪表征,属于单斜晶系,空间群P21,晶胞参数为a=9.889(2),b=5.699 0(11),c=14.516(3),α=90°,β=105.55(3)°,γ=90°,V=788.1(3)A3,V=2,Dc=1.312 Mg/m3,μ=0.099 mm-1,F(000)=332。     

水热法合成Cu(Ⅱ)均苯三酸的配合物

采用水热合成法,合成了两种新型的Cu(Ⅱ)配合物:(1)Cu1Na1C9H16O12,为单斜晶系,I12/a1(15)空间群,a=13.524(2),b=11.221(1),c=18.410(2),α=90°,β=96.06(1)°,γ=90°,V=2 778.16(57)3,Z=8;(2)Cu2C18H20O18,为单斜晶系,P1 21/n1(14)空间群,a=8.570(1),b=18.855(1),c=6.845(3),α=90°,β=92.87(2)°,γ=90°,V=1 104.68(50)3,Z=2。     

二茂铁吡咯烷衍生物的合成及其晶体结构

以1,1-二氰基-2-二茂铁乙烯、L-脯氨酸和芳香醛为原料,在甲苯中反应合成了含有氰基的二茂铁吡咯烷衍生物。2-对硝基苯基-3-二茂铁基-4,4-二氰基双稠吡咯啶经X-射线衍射方法测定了化合物的晶体结构。晶体属单斜晶系,空间群为C2/c,晶体学参数a=24.395(3)A,b=8.992 3(18)A,c=19.005 4(18)A,V=4 325.7(7)A3,Dx=1.432 g/cm3,Z=8,T=113(2)K,F(000)=1 936,R1=0.040 2,wR2=0.093 8。     

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。