三苄基锡(Ⅳ)炔基(烯基)膦酸衍生物的合成及结构表征

烃基锡的膦(磷)酸衍生物具有较强的杀虫、杀菌及除草等生物活性, 受到人们的极大关注[1,2],尤其是三烃基锡(IV)二硫代磷酸酯的合成及应用研究已有较多报道[3,4],但三烃基锡(IV)膦酸衍生物的合成研究很少[5],而三烃基锡(IV)不饱和烃基膦酸衍生物R3SnOP(O)(OH)R'(R'为炔基或烯基)的研究尚未见文献报道.我们以三苄基氯化锡和炔基(烯基)膦酸单钠为原料,合成了6种三苄基锡(IV)炔基(烯基)膦酸类化合物.并用元素分析、红外光谱、核磁共振、氢谱和锡谱、质谱及热重分析等手段表征了这些化合物.     

含氮杂环羧酸基二（三）苄基锡配合物的合成

烃基氯化锡及其衍生物具有广泛的生物活性,如杀虫、杀菌、抗癌等。近年来已有较多报道［１］,但关于杂环羧酸基烃基锡配合物的合成研究报道则很少,而含氮杂环羧酸基苄基锡配合物的合成研究尚未见文献介绍。为寻找具有更高生物活性的有机锡配合物,本文以二（三）苄基氯...     

三苯基锗不饱和烃基酸衍生物的合成和性质

随着倍半锗氧类化合物的合成及应用研究的日益广泛 ,含 Ge_ O键的烃基锗衍生物的合成及应用也逐渐引起了人们的关注 .1 984年 ,L ukevics等 [1]合成了具有抗癌活性的介吗川类化合物 ,1 990年Kakimoto等 [2 ] 报道了具有杀菌活性的环状烃基羧酸的合成与应用 .但是三烃基锗的膦酸类衍生物的合成及生物活性研究均未见文献报道 .为了研究该类化合物的生理活性 [3～ 5] ,本文以三苯基氯化锗和炔基 (烯基 )膦酸钠为原料 ,在苯中反应 ,合成了一系列双 - O- (三苯基锗 )炔基 (烯基 )膦酸酯和单 - O-三苯基锗炔基 (烯基 )膦酸 ,部分化合物初步生理…     

苯基锡炔基膦酸酯的合成

由于烃基锡的磷(膦)酸衍生物具有广泛的生物活性,近年来受到人们的极大关注,相继合成出了许多具有杀虫、杀菌、除草等性能的烃基锡-O,O-二烃基二硫代磷酸酯[1,2]、烃基锡-O-烃基膦酸酯[3]等.但烃基锡烃基膦酸酯的研究则很少,尤其是烃基锡不饱和膦酸酯的研究至今仅有一篇文献[4].本文以二(三)苯基氯化锡和炔基膦酸二钠为原料,合成了10种新的苯基锡炔基膦酸酯,以期获得高生物活性的有机锡化合物.     

二苄基一氯化锡二硫代氨基甲酸酯的合成

二烃基氯化锡及其衍生物具有较强的抗癌活性，日益受到人们的重视。关于含有Ｓｎ—Ｏ键的二烃基锡衍生物的合成研究已有大量报道［１］。但含Ｓｎ—Ｓ键二烃基锡衍生物的合成研究则较少［２］，而二烃基一氯化锡二硫代氨基甲酸酯的合成研究尚未见报道。为了寻找具有抗癌活...     

双(三苯基锗)不饱和烃基膦酸酯的合成

随着倍半氧锗类化合物的合成及应用研究的日益广泛,含Ge-O键的烃基锗衍生物的合成及应用研究也逐渐引起了人们的关注,相继合成了各种类型具有抗癌活性的含Ge-O键的烃基锗类化合物[1～3].但烃基锗膦酸衍生物的合成及应用研究尚未见文献报道.为了探讨该类化合物的结构及生物活性,本文以三苯基氯化锗和烯(炔)基膦酸钠为原料,合成了8种双(三苯基锗)不饱和烃基膦酸酯.……     

三苯基锗烯或炔基膦酸衍生物的合成

由三苯基氯化猪与烯或炔基膦酸盐反应,合成了８种新的三苯基锗烯基或炔基膦酸衍生物,利用元素分析,ＩＲ和ＨＮＭＲ表征了这些化合物的结构     

N—芳基—α—氨基苄基膦酸的合成及对钢铁的缓蚀性能研究

Ｎ－芳基－α－氨基苄基膦酸的合成及对钢铁的缓蚀性能研究朱传方高新蕾肖海燕（华中师范大学化学系武汉４３００７０）用于金属螯合和缓蚀的含氮烃基膦酸主要是应用甲醛、胺、亚磷酸酯（或亚磷酸）通过Ｍａｎｎｉｃｈ反应得到［１，２］而应用其它的醛尤其芳醛与胺合成膦...     

烃基氨基二甲撑基膦酸的合成及其阻垢和缓蚀性能研究

烃基氨基二甲撑基膦酸的合成及其阻垢和缓蚀性能研究朱传方，李中华，孙亚杰（华中师范大学化学系武汉４３００７０）（黑龙江农垦师专化学系哈尔滨）烃基氨基磷酸由于具有类似ＥＤＴＡ、ＮＴＰ（－ＣＨ＿２ＣＯＯＨ）的螫合结构，因而被广泛地用于对金属的缓蚀￣［１］、...     

二（三）苄基锡不饱和烃基膦酸酯的合成

合成了１０种二（三）苄基锡不饱和烃基膦酸酯［（ＰｈＣＨ２）ｎＳｎ］ｎ－１Ｏ２Ｐ（Ｏ）Ｒ（ｎ＝２，３；Ｒ＝—Ｃ≡ＣＰｈ，—Ｃ≡ＣＣ５Ｈ１１－ｎ，—Ｃ≡ＣＣＨ２ＯＣＨ３，—Ｃ≡ＣＣＨ２ＯＣ２Ｈ５，—ＣＨ＝ＣＣｌＰｈ），利用元素分析、核磁共振氢谱和ＴＧ－ＤＴＡ对其组成和结构进行了表征．初步生物活性测试表明，有些化合物具有较强的杀螨和杀菌活性     

利用手持技术改进测定乙醇分子结构实验

利用压强传感器代替排水集气法,改进测定乙醇分子结构实验的仪器装置,并探索最佳反应条件。另外,设计两个空白实验,结合压强变化曲线对实验误差进行相关讨论。     

Neutral diterpenoids of oleoresins of five species of conifers of Transcarpathia

The compositions of the neutral diterpenoids of the oleoresins of five species of conifers growing in the Transcarpathia have been studied. It has been found that the oleoresins ofAbies alba M.,Larix decidua M., andPicea excelsa L. contain more than 50% of neutral diterpenoids. The group and qualitative compositions of the oxygen-containing diterpenoids have been determined. In the oleoresins ofAbies alba,Picea excelsa, andPicea abies tertiary alcohols — cis-abienol and isocembrol — predominate, while inLarix decidua the main component is the hydroxy ester larixyl acetate. Primary alcohols related to the resin acids have been found in all the oleoresins investigated. Features of the distribution of diterpenoids according to the species of conifers have been revealed. The results obtained are necessary for the chemotaxonomy of conifers of the family Pinceae.Novosibirsk Institute of Organic Chemistry, Siberian Branch, Academy of Sciences of the USSR. Translated from Khimiya Prirodynkh Soedinenii, No. 6, pp. 812–816, November–December, 1988.     

光谱仪测试范围的扩展

由于石化行业的生产需要，其材质的使用具有多样性和广泛性，经常会出现顾客委托的测试样品的一个或几个元素跨越光谱仪现有测试程序测量范围的情况。本法通过对光谱仪测试原理的认识，根据光谱仪的测试能力及标样的采集，实现了一个或几个元素测量范围的扩展，并对其测量的影响因素进行了研究。     

Dichroism of absorption and polarization of phosphorescence of molecules of the closed form of nitrobenzospirothiopyran

The spectral-polarization characteristics of absorption and phosphorescence of molecules of the initial form of nitro-substituted indolinospirobenzothiopyran were studied in oriented polyethylene films and in solutions with different polarity. An oscillator model of the electron transitions responsible for the formation of absorption and luminescence spectra was suggested. It was established that the principal differences in the spectral and photophysical properties of the compound studied and its oxygen-containing analog are associated with the fact that the electronegativity of the S atom is lower than that of the O atom. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 6, pp. 1143–1146, June, 1997.     

Influence of viscosity of medium on processes of oxygen quenching of excited states of mesoporphyrin

The oxygen quenching rate constants for singlet and triplet excited states of the dimethyl ester of mesoporphyrin IX increase with decreasing viscosity of the medium and reach a maximum at a viscosity of approximately 0.4 mPa·sec, after which the rate constants begin to decrease. The drop in rate constant with increasing fluidity of the medium may be related to a nonequilibrium character of the elementary act in the interaction of the reactants in the solvent cage. In viscous media such as isopropyl alcohol, isobutyl alcohol, and isoamyl alcohol, the reaction radius is greater than the sum of the radii of the reacting particles. The long-range character of these processes is due to the relatively weak dependence of the quenching probability on distance.Translated from Teoreticheskaya i Éksperimental'naya Khimiya, Vol. 25, No. 2, pp. 161–167, March–April, 1989.     

Determination of heats of detonation and influence of components of composite explosives on heats of detonation of high explosives

The heats of detonation of 20 simple high explosives and explosive mixtures were determined by means of an adiabatic detonation calorimeter designed by the authors. The results indicated that the performance of the instrument was reliable and the experimental data were very accurate. For explosive mixtures, there was a linear accumulative relationship between the heats of detonation of the explosive mixture and its components. Accordingly, the heats of detonation of explosive mixtures could be calculated directly from the heats of detonation of simple explosives and the characteristic heats of other components. The experiments showed that the gold or brass shell of the cylindrical charge could be substituted by a thick-walled porcelain shell, which had the advantage of cheapness.

     

物质分配系数的测定实验改进

实验教学目的是从解决实际问题出发,以实验技术训练和实验设计思想培养为目标。介绍了将单一的物质分配系数测定实验改进为综合实验,提高了实验效果及实验资源利用率。     

Calculation of enthalpies of hydrogenation of hydrocarbons

Sets of hydrogen molecule equivalents have been developed which permit the calculation of hydrogenation of different types of carbon-carbon bonds from ab initio total energies (3-21G and 6-31G* basis sets, and, to a more limited extent, for MP2/6-31G* data) of reactants and products. The calculated enthalpies of hydrogenation are in good agreement with experiment for unstrained molecules, with average errors on the order of 2 kcal/mol. The 6-31G* equivalents allow the enthalpies for strained molecules to be calculated accurately, but the 3-21G equivalents do not. The equivalents for both basis sets have been tested by calculating the enthalpies of hydrogenation of carbon-carbon bonds in nitrogen- and oxygen-containing organic molecules, free radicals, and classical carbocations. The results are in good agreement with experiment in most cases.     

非那雄胺合成工艺改进

非那雄胺能抑制5α-还原酶的活性,明显降低二氢睾酮水平,是一种治疗良性前列腺增生的有效药品。该合成工艺以甾烯酮酸为原料,将其与氯化亚砜反应,无须分离即与叔丁胺反应得17β-酰胺化合物,再氧化开环,环合,氢化,脱氢合成了非那雄胺。经元素分析、IR、1HNMR、13CNMR、MS分析表征了其结构。该法无须使用昂贵的2,2-二吡啶二硫化物和剧毒药品苯亚硒酸酐,且以乙酸铵代替氨气,降低了对设备的要求和腐蚀,更适用于工业生产。