OAP-H2O2-HRP伏安酶联免疫分析新体系测定人血清总甲状腺素

提出邻氨基酚（ＯＡＰ）－Ｈ２Ｏ２－辣根过氧化物酶（ＨＲＰ）发酶联免疫分析新体系并用于人血清中总甲状腺素的测定。本方法以线性扫描二阶导数伏安法检测ＨＲＰ催化Ｈ２Ｏ２氧化ＯＡＰ的产物,用于游离ＨＲＰ和ＨＲＰ标记物的测定,灵敏度的高于经典的ＥＬＩＳＡ显色光度法。测定游离ＨＲＰ的线性范围为１．０×１０＾１２￣４．０×１０＾－９ｇ／ｍＬ,检测限达６．０×１０＾１３ｇ／ｍＬ。本法对总甲状腺素测定的线性范围为１     

对氟苯酚-H_2O_2-HRP体系酶联荧光免疫分析研究ⅢF~--Al-酸性铬蓝K荧光熄灭法测定人血清中乙肝E抗原

建立了一种检测人血清中乙肝Ｅ抗原的新荧光光度法．通过酶促反应：对氟苯酚＋Ｈ２Ｏ２ＨＲＰ→苯酚＋Ｆ－＋Ｈ２Ｏ与Ａｌ－酸性铬蓝Ｋ荧光体系相偶合，测定辣根过氧化物酶（ＨＲＰ）及其标记物．测定ＨＲＰ的线性范围为０．１９～３１ｍＵ／ｍＬ，检出限为０．０４ｍＵ／ｍＬ．     

对氟苯酚-H_2O_2-HRP体系酶联荧光免疫分析研究ⅣF~--Zr-8-羟基喹啉-5-磺酸荧光法测定人血清中乙肝表面抗原和E抗体

将Ｚｒ－８－羟基喹啉－５－磺酸荧光体系与对氟苯酚为底物的酶促反应相偶合，建立了一种测定辣根过氧化物酶（ＨＲＰ）及其标记物的新方法．测定ＨＲＰ的线性范围为０．０３１～３１ｍＵ／ｍＬ，检出限（３σ）为０．００７ｍＵ／ｍＬ．用于测定人血清中乙肝表面抗原和Ｅ抗体，结果令人满意．     

对氟苯酚—H2O2—HRP体系酶联荧光免疫分析研究：IV,F^—Zr—8羟基喹…

将Ｚｒ－８羟基喹啉－５－磺酸荧光体系与对氟苯酚为底物的酶促反应相偶合，建立了一种测定辣根过氧化物酶（ＨＲＰ）及其标记物的新方法，测定ＨＲＰ的线性范围为０．０３１～３１ｍＵ／ｍＬ，检出限（３σ）为０．００７ｍＵ／ｍＬ．用于测定人血清中乙肝表面抗原和Ｅ抗体。结果令人满意.     

以氟苯酚—H2O2—HRP体系酶联荧光免疫分析研究：Ⅲ.F^—Al酸性铬蓝…

建立了一种检测人血清中乙肝Ｅ抗原的新荧光光度法，通过酶促反应，对氟苯酚＋Ｈ２Ｏ２→＾ＨＲＰ苯酚＋Ｆ＾－＋Ｈ２Ｏ与Ａｌ－酸性铬蓝Ｋ荧光体系相偶合，测定辣根过氧化物酶（ＨＲＰ）及其标记物，测定ＨＲＰ的线性范围为０．１９～３１ｍＵ／ｍＬ，检出限为０．０４ｍＵ／ｍＬ。     

联苯胺-H_2O_2-HRP伏安酶联免疫分析体系测定植物病毒TMV和TRSV

提出了联苯胺－Ｈ２Ｏ２－辣根过氧化物酶（ＨＲＰ）伏安酶联免疫分析体系测定植物病毒烟草花叶病毒（ＴＭＶ）和烟草环斑病毒（ＴＲＳＶ）的新方法。ＨＲＰ标记的羊抗兔酶标记抗体ＩｇＧ－ＨＲＰ可以催化Ｈ２Ｏ２氧化联苯胺的反应,其氧化产物在Ｂｒｉｔｏｎ－Ｒｏｂｉｎｓｏｎ（ＢＲ）缓冲溶液中在－０．６２Ｖ（ＳＣＥ）左右产生灵敏的线性扫描二阶导数伏安峰,可以测定ＩｇＧ－ＨＲＰ。根据ＩｇＧ－ＨＲＰ与植物病毒及其抗血清的免疫反应,可以间接测定植物病毒。本法测定ＴＭＶ的检出限为０．２５ｎｇ／ｍＬ,线性范围为０．２５～５０００ｎｇ／ｍＬ;测定ＴＲＳＶ的检出限为１．５ｎｇ／ｍＬ,线性范围为１．５～３０００ｎｇ／ｍＬ;测定ＴＭＶ烟草病叶澄清液的最高稀释比为１∶１００００。检测灵敏度高于酶联免疫吸附显色光度法（ＥＬＩＳＡ）     

联本胺—H2O2—HRP伏安酶联免疫分析体系测定植物病毒TMV和TRSV

提出了联苯胺－Ｈ２Ｏ２－辣根过氧化物酶伏安酶联免疫分析体系测定植株病毒烟草花叶病毒（ＴＭＶ）和烟草环斑病毒（ＴＲＳＶ）的新方法。ＨＲＰ标记的间抗兔酶标记抗体ＩｇＧ－ＨＲＰ可以催化Ｈ２Ｏ２氧化联苯胺的反应，其氧化产物在Ｂｒｉｔｔｏｎ－Ｒｏｂｉｎｓｏｎ（ＢＲ）缓冲溶液中在－０．６２Ｖ（ＳＣＥ）左右产生灵敏的线性扫描二阶导数伏安峰，可以测定ＩｇＧ－ＨＲＰ。根据ＩｇＧ－ＨＲＰ与植物病毒及其抗血清的免疫反应     

间氨基酚—过氧化氢—辣根过氧化物酶伏安酶联免疫分析新体系测定人血 …

提出间氨基酚（ＭＡＰ）－Ｈ２Ｏ２－辣根过氧化物酶（ＨＲＰ）伏安酶联免疫分析新体系并用于人血清中总甲状腺素（Ｔ４）的测定。本方法以线性扫描二阶导数伏安法检测ＨＲＰ催化Ｈ２Ｏ２氧化ＭＡＰ的产物,用于游离ＨＲＰ和ＨＲＰ标记物的测定,灵敏度均坑于经典的ＥＬＩＳＡ显色光度法。本法对总甲状腺素测定的线性范围为０．５－３２０ｍｇ／Ｌ。用所建立的方法对人血清样品进行了测定,并与现行的ＥＬＩＳＡ显色光度法对照,二者     

氯化血红素模拟过氧化物酶高效液相色谱柱后衍生法测定过氧化氢和水溶性有机过氧化物

研究了氯化血红素（Ｈｅｍｉｎ）模拟辣根过氧化物酶（ＨＲＰ），对羟基苯乙酸（ＰＨＰＡＡ）作 底物，高效液相色谱（ＨＰＬＣ）柱后衍生荧光法测定Ｈ２Ｏ２和水溶性有机过氧化物的方法。采用 Ｈｅｍｉｎ作催化剂柱后衍生反应的最佳ｐＨ值约为１１，与荧光检测ｐＨ值一致，使得以往ＨＰＬＣ 柱后衍生方法所需的高压泵从３台减少到２台，而一些不能作为ＨＲＰ底物的羟烷基过氧化 物在ｐＨ值≥１０的溶液中迅速水解为Ｈ２Ｏ２从而得到测定。优化了测定Ｈ２Ｏ２和甲基过氧化 氢（ＣＨ３ ＯＯＨ， ＭＨＰ）的条件。最佳条件下 Ｈｅｍｉｎ方法测定 Ｈ２Ｏ２的检测限为 ９．０ × １０－９ ｍｏｌ／Ｌ， 测定 ＭＨＰ的检测限为 ２．０ × １０－７ ｍｏｌ／Ｌ。     

邻氨基酚-过氧化氢-辣根过氧化物酶伏安酶联免疫分析法测定人血清甲胎蛋白

提出了邻氨基酚（ＯＡＰ）－Ｈ２Ｏ２－辣根过氧化物酶（ＨＲＰ）伏安酶联免疫分析法测定人血清甲胎蛋白（α－ＦＰ）的新方法．该方法是将ＨＲＰ催化Ｈ２Ｏ２氧化邻氨基酸的酶催化反应与邻氨基酚的氧化产物在滴汞电极上的还原反应相偶合，在ＢＲ缓冲溶液中，在－０．４３ Ｖ（ｖｓ．ＳＣＥ）左右产生灵敏的极谱波．根据测定标记在甲胎蛋白抗体上的ＨＲＰ的量，求得发生免疫反应的 α－ＦＰ的含量。该方法对甲胎蛋白测定的线性范围为 １． ２５～４００ ｍｇ／Ｌ。用所建立的方法对病人血清样品进行了测定，并与酶联免疫吸附测定光度法（ＥＬＩＳＡ）进行对照，二者相关性很好。     

二氧化碳和丙烯直接合成甲基丙烯酸的NiPMo/TiO2催化剂的研究

用溶胶-凝胶法以磷钼酸(MPA)的镍盐溶液水解钛酸四丁酯制备了NiPMo/TiO2催化剂.使用ICP、 XRD、 TG-DTA、 IR、 TPD-MS和微反应技术研究了催化剂的化学组成、热稳定性、化学吸附性质和催化反应性能.杂多钼酸盐与TiO2通过O2-在TiO2表面发生了键合.在623 K下,杂多阴离子仍保持原有的Keggin结构.CO2在Lewis酸位Ni(Ⅱ)和Lewis碱位Ni-O-Mo的桥氧协同作用下生成CO2卧式吸附态Ni(Ⅱ)←O-(CO)←(O--Ni).丙烯有多种吸附态在催化剂上吸附.在563 K、 1 MPa和空速1500 h-1的反应条件下,丙烯的摩尔转化率为3.2%,产物MAA选择性为95%.     

Toward new camptothecins. Part 6: Synthesis of crucial ketones and their use in Friedländer reaction

In the context of the preparation of camptothecin and luotonin A analogs, the synthesis of some key keto-precursors and their use in Friedländer condensation are described. This paper also focuses on the stability of these keto intermediates and emphasizes the major differences between indolizinones and pyrroloquinazolinones series. Noteworthy is also the report of some original structures isolated as by-products of some experiments.     

CoFe2O4自形成磁性液体场致结构化对磁化的影响

The Langevin paramagnetic theory can’t describe the relation between magnetization of ferrofluids and applied magnetic field. The structuralization of ferrofluids, which is considered the main influence factor of the magnetization, is regarded. The part of magnetization works is deposited when the structure is forming. This action influences the magnetization of ferrofluids directly or indirectly. On the base of the “compressing” model, the Langevin function that usually describes the magnetization of ferrofluid is modified, and a well-fitted curve is obtained. An equation of the relation between the equivalent volume fraction after being “compressed” and the intensity of magnetic field is discovered, which approximately describes the process of magnetization. The relation between the approximate initial susceptibility and the volume fraction can be obtained from modified formula.     

Highly regioselective Buchwald–Hartwig amination at C-2 of 2,4-dichloropyridine enabling a novel approach to 2,4-bisanilinopyridine (BAPyd) libraries

The highly regioselective Buchwald–Hartwig amination at C-2 of the cheap and readily accessible reagent, 2,4-dichloropyridine with a range of anilines and heterocyclic amines is described. This new methodology is robust and provides a facile access to 4-chloro-N-phenylpyridin-2-amines on 0.25 mol scale. These intermediates undergo a further Buchwald–Hartwig amination at higher temperature to enable rapid exploration of the chemical space at C-4 and to provide a library of 2,4-bisaminopyridines.     

KMnO4-mediated oxidative CN bond cleavage of tertiary amines: Synthesis of amides and sulfonamides

KMnO₄-mediated oxidative CN bond cleavage of tertiary amines producing secondary amine was introduced, which was trapped by electrophiles (acyl chloride and sulfonyl chloride) to form amides and sulfonamides. The reaction could take place at mild condition, tolerating a wide range of function groups and affording products in moderate to excellent yields.     

Chemistry of heterocyclic compounds at the A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, over 50 years (Review)

The review contains a concise historical account and information on the most significant researches undertaken by the staff at the A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences on the Chemistry of Heterocyclic Compounds. Dedicated to Academician of the Russian Academy of Sciences B. A. Trofimov on his 70th jubilee. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1443–1502, October, 2008.     

Sulfur-directed metal-free and regiospecific methyl C(sp3)–H imidation of thioanisoles

Regiospecific and direct imidation of the methyl C(sp³)–H bond of thioanisoles is realized under mild and metal-free conditions with N-fluorobis(benzenesulfonyl)imide as an oxidant and nitrogen source. Proposed mechanism suggests that thionium ion intermediates and a Pummerer-type reaction are involved. The imidation has advantages such as high step-economy, excellent functionality tolerance, and regiospecificity, giving structurally diverse imidation products.     

Selective syntheses of 2H-1,3-oxazines and 1H-pyrrol-3(2H)-ones via temperature-dependent Rh(II)-carbenoid-mediated 2H-azirine-ring expansion

The Rh(II)-catalyzed reaction of 2-carbonyl-substituted 2H-azirines with ethyl 2-cyano-2-diazoacetate or 2-diazo-3,3,3-trifluoropropionate provides an easy access to 2H-1,3-oxazines and 1H-pyrrol-3(2H)-ones. These compounds can be selectively prepared from the same starting material using temperature as the only varied parameter. The 2-azabuta-1,3-diene intermediate, a common precursor for both heterocyclic products, isomerizes into 2H-1,3-oxazine under kinetic control, while 1H-pyrrol-3(2H)-one is the sole product of the reaction at elevated temperatures. According to DFT-calculations a one-atom oxazine ring contraction involving ring-opening to a 2-azabuta-1,3-diene intermediate, followed by a 1,5- and 1,2-prototropic shift leads to the consecutive formation of imidoylketene and azomethine ylide, which then further undergo cyclization to the pyrrole derivative.     

Synthesis of 1-benzyloxypyrazin-2(1H)-one derivatives

Different approaches for the synthesis of 1-benzyloxypyrazin-2(1H)-one derivatives from simple amino acids have been investigated. A library of 33 precursors for the preparation of N-hydroxy pyrazinones was obtained in moderate to good yields.