5, 5’-二硫双（2-硝基苯甲酸）构筑的钴配合物的合成与晶体结构

以柔性配体5,5’-二硫双（2-硝基苯甲酸）为主配体,与含氮辅助配体在水热条件下合成了2个Co（Ⅱ）配合物{[Co（dtb）（bpp）·H₂O]}_n（1）,{[Co（dtb）（phen）·2H₂O]}_n（2）（H₂dtb=5,5’-二硫双（2-硝基苯甲酸）,phen=1,10-菲咯啉,bpp=1,3-二（4-吡啶）-丙烷）,通过X-射线单晶衍射、X-射线粉末衍射、红外光谱、热重分析和元素分析方法对其进行表征。结构测试表明1为正交晶系,Pbca空间群,晶胞参数为a=1.0149（2）nm,b=2.2159（5）nm,c=2.5291（6）nm,V=5.688（2）nm³,D_c=1.564g·cm^-3,Z=8。2为三斜晶系,P1空间群,晶胞参数为a=0.7401（3）nm,b=1.0742（4）nm,c=1.7837（6）nm,α=98.452（7）°,β=99.816（7）°,γ=98.979（7）°,V=1.3580（8）nm³,D_c=1.637g·cm^-3,Z=2。化合物1为三维网络结构,并包含单股双轴假螺旋结构。配合物2为一维链状结构,相邻一维链之间通过氢键作用形成二维超分子网络结构。     

三烃基锡配合物（PhCMe2CH2）3Sn[O2C（CHRPh）][R：OH（1）, H（2）]的合成、结构、热稳定性、量子化学及毒性研究

甲醇中氧化双[三（2-甲基-2-苯基）丙基锡]分别与DL-扁桃酸、苯乙酸反应,合成了2个三烃基锡配合物（PhCMe₂CH₂）₃Sn[O₂CCH（OH）Ph]（1）和（PhCMe₂CH₂）₃Sn（O₂CCH₂Ph）（2）。经IR、¹H和¹³CNMR、元素分析和X-射线单晶衍射表征结构。1和2均属三斜晶系,空间群P1。配合物1晶体学参数：a=0.9711（2）nm,b=1.1766（3）nm,c=1.7008（4）nm,α=96.840（12）°,β=103.235（12）°,γ=110.725（11）°,Z=2,V=1.7260（7）nm³,D_c=1.288g·cm^-3,μ（MoKα）=0.773mm^-1,F（000）=696,R₁=0.0325,wR₂=0.0873。配合物2晶体学参数：a=0.97285（9）nm,b=1.16140（11）nm,c=1.68931（16）nm,α=96.830（5）°,β=101.935（5）°,γ=110.770（4）°,Z=2,V=1.7071（3）nm³,D_c=1.271g·cm^-3,μ（MoKα）=0.778mm^-1,F（000）=680,R₁=0.0248,wR₂=0.0673。1和2的中心锡原子均为畸变四面体构型。通过分子间C-H…O或C-H…π作用,1和2分别形成一维带状或链状结构。热重分析结果表明,1和2具有良好的稳定性。毒性测试的初步结果表明,配合物1、2具有较好的环境相容性,对石螺急性毒性较小。     

La（Ⅲ）、Nd（Ⅲ）与甜菜碱类衍生物形成的包含（H2O）6分子簇的配合物的晶体结构

利用配体1,5-二（3-羧基吡啶基）-N-甲基二乙胺（L）合成2种稀土金属配合物{[La₂L₄（H₂O）₂]（ClO₄）₆·6H₂O}_n（1）和[Nd₂L₄（DMF）₆（H₂O）₂]₂（ClO₄）₆·4H₂O（2）。用红外光谱和X-射线单晶衍射表征配合物的晶体结构。结构分析表明：配合物1属于三斜晶系,P1空间群,其晶胞参数为a=1.4966（3）nm,b=1.5597（4）nm,c=1.9568（4）nm,α=86.776（6）°,β=77.723（7）°,γ=87.168（7）°,Z=2。在配合物1中,一对La（Ⅲ）原子被2个羧基桥联,形成双核结构;双核结构进一步被羧基连接,从而形成平行于c轴的一维链。值得注意的是配合物1的晶体结构中包含着由氢键连接的6个H₂O分子组成的水分子簇。配合物2属于三斜晶系,P1空间群,晶胞参数为a=1.0408（4）nm,b=1.3541（5）nm,c=2.975（1）nm,α=94.390（8）°,β=91.720（7）°,γ=95.230（4）°,Z=2。配合物2中4个羧基连接一对Nd（Ⅲ）原子,形成四轮状结构,其中2个羧基采取syn-syn双原子桥联模式,而其余2个羧基则采取单原子桥联模式。     

两种铜配位聚合物的晶体结构和量子化学计算

在水热条件下以4-硝基邻苯二甲酸（4-H₂nph）/2,2''-联吡啶-4,4''-二甲酸（H₂bda）为主要配体,3-（2-吡啶基）吡唑（HL）/1,4-双（咪唑基-1-基）丁烷（bib）为辅助配体制备了2种新的金属有机配位聚合物[Cu₄（4-nph）（L）₆]_n （1）和{[Cu₂（bda）₂（bib）₂（H₂O）₄]·4H₂O}_n （2）。通过元素分析、红外光谱、热重X射线单晶衍射和X射线粉末衍射对它们进行了表征。结果表明,配合物1属于单斜晶系,C2/c空间群。晶胞参数：a=1.956 16（8） nm,b=1.290 68（8） nm,c=2.160 34（12） nm,β=97.073（2）°,V=5.412 9（5） nm³,Z=4。配合物2属于三斜晶系,P1空间群。晶胞参数：a=0.962 22（15） nm,b=1.102 90（17） nm,c=1.404 3（2） nm,α=72.752（4）°,β=79.271（4）°,γ=67.065 （3）°,V=1.306 6（4） nm³,Z=1。在配合物1中,羧基配体4-nph^2-通过单齿模式桥联金属中心,形成一维结构。在配合物2中,柔性bib配体连接金属中心形成具有26元环的双核结构。此外,还用Gaussian16程序PBE0/LANL2DZ方法从配合物1的晶体结构中提取“分子片段”进行了量子化学计算。计算结果表明配位原子与铜（Ⅱ）离子之间存在着共价作用。     

以三唑农药为配体的两个铜配合物的合成、晶体结构与抑菌活性

由三唑农药烯效唑和多效唑合成了2个铜配合物[CuL₄¹Cl₂](1)和[CuL₄²Cl₂·4H₂O](2)(L¹=uniconazole,L²=paclobutrazol)。通过元素分析、红外光谱和X-ray单晶衍射对其结构进行了表征。结构分析表明,1属三斜晶系,P1空间群,晶胞参数为a=0.8956(3)nm,b=1.3267(4)nm,c=1.4918(4)nm,α=94.828(3)°,β=97.774(3)°,γ=105.280(3)°,V=1.6808(9)nm³。2属三斜晶系,P1空间群,晶胞参数为a=1.02189(19)nm,b=1.329(3)nm,c=1.3664(3)nm,α=81.564(2)°,β=79.508(2)°,γ=79.185(2)°,V=1.7853(7)nm³。在2个配合物中,六配位的铜离子都采取扭曲的八面体配位构型,分别来自三唑配体的4个氮原子和2个氯原子配位。1和2都由分子间氢键连接成一维链结构。与相应的配体相比,1和2的抑菌活性明显增强。     

三嗪吡唑类铜配合物的合成、结构及光谱研究

以三齿吡唑-三嗪(类蝎型)化合物2,4-二(3,5-二甲基吡唑)-6-二乙基胺-1,3,5-三嗪(bpz^*eaT)为配体,在无水乙醇和甲醇溶剂中,合成了2个配合物Cu₂(mpz^*eaT-EtO)₂(N₃)₂Cl₂(1)和Cu₂(mpz^*eaT-MeO)₂(N₃)₄(2)(mpz^*eaT-EtO：2-(3,5-二甲基吡唑)-4-乙醇-6-二乙基胺-1,3,5-三嗪;mpz^*eaT-MeO：2-(3,5-二甲基吡唑)-4-甲醇-6-二乙基胺-1,3,5-三嗪)。通过元素分析、红外光谱、紫外光谱、热重分析以及X-ray单晶衍射方法对配合物进行了表征,并分析了其光谱及结构特征。晶体结构表明,配合物1属于三斜晶系,P1空间群,a=0.9949(2)nm,b=1.0216(2)nm,c=1.1480(2)nm,α=115.11(3)°,β=106.99(3)°,γ=100.39(3)°,V=0.9460(3)nm³,Z=1;配合物2属于单斜晶系,P2₁/c空间群,a=1.5464(5)nm,b=1.4008(5)nm,c=0.8905(3)nm,β=103.227(5)°,V=1.8779(10)nm³,Z=2。配合物1和2中的中心铜原子均为五配位,形成扭曲的四角锥构型。     

基于2-(4-甲基苯甲酰基)苯甲酸及2，2'-联吡啶的双核铜(Ⅱ)配合物的晶体结构、荧光和磁性

以2-(4-甲基苯甲酰基)苯甲酸(HL)及2,2'-联吡啶(2,2'-bipy)为配体合成了一个双核铜(Ⅱ)配合物[Cu₂(L)₄(2,2'-bipy)₂]·H₂O(1),并对其进行了晶体结构测定。测定结果表明,该配合物晶体属于三斜晶系,空间群为P1,晶胞参数：a=1.01257(15)nm,b=1.3125(2)nm,c=1.3170(2)nm,α=82.985(2)°,β=76.437(2)°,γ=88.290(2)°,V=1.6887(4)nm³,D_c=1.391g·cm^-3,Z=2,F(000)=732,GooF=1.027,最终偏离因子R₁=0.0375,wR₂=0.0914。在配合物分子中相邻的2个铜(Ⅱ)离子通过2个2-(4-甲基苯甲酰基)苯甲酸根桥联配位连接起来,其端位各与1个2-(4-甲基苯甲酰基)苯甲酸根和1个2,2'-联吡啶分子配位,整个分子形成了双核结构。测定了标题配合物的荧光和磁性,结果表明：当激发波长为608nm时,配合物在472和476nm处有2个较强的荧光发射峰;在2~100K,配合物具有顺磁性。     

两个由醋酸根和含吡啶基配体构筑的Zn(II)配聚物的合成、晶体结构及其荧光性质

以醋酸锌、异烟肼（INH）、2-氨基吡啶（2-APy）为原料在N,N-二甲基甲酰胺（DMF）溶液中合成了2个Zn（Ⅱ）配位聚合物[Zn（CH₃COO）₂（INH）]_n（1）,[Zn（CH₃COO）₂（2-APy）]_n（2）,用红外光谱、元素分析、粉末X射线衍射、X射线单晶衍射对配合物进行了表征。晶体结构测试表明,配聚物1属单斜晶系,空间群P2₁/c,晶胞参数：a=0.914 44（17）nm,b=0.161 86（3）nm,c=0.871 75（16）nm,β=96.181（3）°,V=1.282 8（4）nm³,Z=4;配聚物为2D层状结构,该层状结构通过氢键弱相互作用,进一步形成3D超分子结构。配聚物2属三斜晶系,空间群P1,晶胞参数：a=0.747 0（4）nm,b=0.814 5（5）nm,c=1.895 7（11）nm,α=88.276（8）°,β=86.202（8）°,γ=84.334（8）°,V=1.144 9（11）nm³,Z=2;配聚物2为一维zig-zag链状结构。室温固态荧光测试显示,配聚物1、2分别在最大波长382.6和367.5 nm处具有较强的荧光发射。     

两个由醋酸根和含吡啶基配体构筑的Zn(Ⅱ)配聚物的合成、晶体结构及其荧光性质

以醋酸锌、异烟肼（INH）、2-氨基吡啶（2-APy）为原料在N,N-二甲基甲酰胺（DMF）溶液中合成了2个Zn（Ⅱ）配位聚合物[Zn（CH₃COO）₂（INH）]_n（1）,[Zn（CH₃COO）₂（2-APy）]_n（2）,用红外光谱、元素分析、粉末X射线衍射、X射线单晶衍射对配合物进行了表征。晶体结构测试表明,配聚物1属单斜晶系,空间群P2₁/c,晶胞参数：a=0.914 44（17）nm,b=0.161 86（3）nm,c=0.871 75（16）nm,β=96.181（3）°,V=1.282 8（4）nm³,Z=4;配聚物为2D层状结构,该层状结构通过氢键弱相互作用,进一步形成3D超分子结构。配聚物2属三斜晶系,空间群P1,晶胞参数：a=0.747 0（4）nm,b=0.814 5（5）nm,c=1.895 7（11）nm,α=88.276（8）°,β=86.202（8）°,γ=84.334（8）°,V=1.144 9（11）nm³,Z=2;配聚物2为一维zig-zag链状结构。室温固态荧光测试显示,配聚物1、2分别在最大波长382.6和367.5 nm处具有较强的荧光发射。     

两个三环己基锡芳香羧酸酯的合成、结构、热稳定性及体外抗癌活性研究

甲醇中三环己基氢氧化锡分别与呋喃-2-甲酸、2,4,6-三甲基苯甲酸反应,合成了2个三环己基锡芳香羧酸酯Cy₃SnO₂CC₄H₃O（1）和Cy₃SnO₂CC₆H₂Me₃（2）（Cy为环己基）。通过IR、¹H和¹³C NMR、元素分析及X-射线单晶衍射表征结构。（1）和（2）均属单斜晶系,配合物（1）空间群P2₁,晶体学参数：a=0.82304（2）nm,b=1.11119（3）nm,c=1.28390（3）nm,β=101.090（2）°,Z=2,V=1.15227（5）nm³,D_c=1.381g·cm^-3,μ（Mo Kα）=1.127mm^-1,F（000）=496,R₁=0.0529,wR₂=0.1387。配合物（2）空间群P2₁/c,晶体学参数：a=0.99962（2）nm,b=1.41597（2）nm,c=1.97359（3）nm,β=94.0420（10）°,Z=4,V=2.78653（8）nm³,D_c=1.266g·cm^-3,μ（Mo Kα）=0.937mm^-1,F（000）=1112,R₁=0.0540,wR₂=0.1619。配合物（1）和（2）的中心锡原子均为畸变四面体构型。通过分子间氢键作用,配合物（1）形成二维网状结构。试验表明,配合物（1）和（2）具有良好的热稳定性,对人癌细胞Colo205、HepG2、MCF-7、Hela、NCI-H460增殖均有较强的抑制作用。     

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.     

α-Amino acid derived enaminones and their application in the synthesis of N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates and other heterocycles

A new and simple synthesis of novel N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates, which exist in equilibrium with their 4-oxo tautomers, has been developed in two steps starting from N-protected α-amino acids. The key intermediates are enaminones, which can also be isolated, characterized, and used for the construction of other functionalized heterocycles, before they spontaneously decompose to pyrrole products. 4-Hydroxypyrroles are prone to partial aerial oxidation but can be efficiently alkylated or reduced to stable polysubstituted pyrrolidine derivatives.     

Specific intramolecular aromatic CH insertion of diazosulfonamides

The chemoselectivity in the intramolecular CH insertion of various diazosulfonamides has been experimentally studied. The results reveal that the aliphatic 1,4-, 1,5-, or 1,6-C(sp³)?H insertions of diazosulfonamides are not accessible, while the aromatic 1,5-C(sp²)?H insertion can be realized specifically by adjusting the diazo-adjacent group. In addition, the general chemoselectivities in the intramolecular CH insertions of diazosulfonyl compounds are summarized. Generally, diazosulfones undergo both aromatic 1,5-C(sp²)?H and aliphatic 1,5- and 1,6-C(sp³)?H insertions, while diazosulfonates undergo aliphatic 1,5- and 1,6-C(sp³)?H insertions. However, diazosulfonamides only undergo aromatic 1,5-C(sp²)?H insertion.     

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.     

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.     

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.     

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.     

N-Heterocyclic carbene-palladacyclic complexes: synthesis,characterization and their applications in the C-N coupling and α-arylation of ketones using aryl chlorides

N-Heterocyclic carbene-palladacyclic complexes 3 were successfully achieved in a one-pot procedure under mild conditions. The structure of 3a was unambiguously confirmed by X-ray single crystal diffraction and it was an active catalyst in the Buchwald-Hartwig amination and α-arylation of ketones even at very low catalyst loadings (0.01?mol%).     

Iodine-mediated oxidative Pictet-Spengler reaction using terminal alkyne as the 2-oxoaldehyde surrogate for the synthesis of 1-aroyl-β-carbolines and fused-nitrogen heterocycles

An efficient iodine-mediated oxidative Pictet-Spengler reaction in dimethyl sulphoxide (DMSO) using terminal alkynes as the 2-oxoaldehyde surrogate for the synthesis of aryl (9H-pyrido[3,4-b]indol-1-yl)methanones is described. The scope of the protocol includes the total synthesis of Fascaplysin, Eudistomins Y₁ and Y₂. The methodology is extended for preparing pyrrolo[1,2-a]-quinoxaline and indolo[1,5-a]quinoxaline derivatives. The utility of 1-aroyl-β-carbolines was demonstrated by performing palladium-catalyzed β-carboline directed ortho-C(sp2)-H functionalization of the phenyl ring with thiomethyl (SMe) group using DMSO as source and for accessing 4-aryl-canthin-6-ones.