四个基于酰腙配体的双核苄基锡配合物的合成、晶体结构及体外抗癌活性

通过微波"一锅法"合成了4个双核苄基锡配合物:{[C_4H_3S(O)C=N-N=C(Me)COO](PhCH_2)_2Sn(MeOH)}_2(C1)、{[C_4H_3S(O)C=NN=C (Me)COO](p-Cl-C_6H_4CH_2)_2Sn (MeOH)}_2(C2)、{[C_4H_3S (O)C=N-N=C (PhCH_2)COO](PhCH_2)_2Sn (MeOH)}_2(C3)、{[C_4H_3S (O)C=N-N=C(PhCH_2)COO](p-Cl-C_6H_4CH_2)_2Sn(MeOH)}_2(C4),利用元素分析、IR、~1H NMR、~(13)C NMR、~(119)Sn NMR、HRMS以及X射线单晶衍射等表征了配合物结构。4个配合物分子均为双锡核分子,以Sn_2O_2四元环为中心对称,且中心锡原子与配位原子形成七配位畸变五角双锥构型。测试了配合物C1～C4的热稳定性以及配合物对癌细胞H460、HepG2、MCF7的体外抑制活性,结果表明:配合物C2是4个新合成的配合物中抑制癌细胞效果最好的化合物。     

Syntheses,Crystal Structures and in vitro Anticancer Activities of Dibenzyltin Compounds Based on the N-(2-Phenylacetic acid)-aroyl Hydrazone

Two dibenzyltin compounds, {[C_6H_5 O(O)C=N–N=C(Ph)COO](m-Cl–C_6H_4CH_2)_2-Sn(CH_3OH)}_2(1) and {[p-Me–C_6H_4O(O)C=N–N=C(Ph)COO](m-Cl–C_6H_4CH_2)_2 Sn(CH_3OH)}_2(2), have been synthesized by microwave "one pot" reaction with benzoylhydrazine(or p-methyl benzhydrazine), phenylglyoxylic acid and di-m-chlorobenzyltin dichloride. Compound 2 contains two crystals 2 a and 2 b. The compounds have been characterized with IR, elemental analysis, ~1 H, ~(13)C and ~(119)Sn NMR spectra, H RMS. Three crystals are all binuclear molecules with a Sn_2O_2 four-membered ring plane, and each Sn atom center is seven-coordinated with [SnO_4C_2 N] to form a distorted pentagonal bipyramidal configuration. In vitro antitumor activities of all compounds and carboplatin were evaluated by MTT against three human cancer cells such as NCI-H460(lung cancer cells), HepG_2(liver cancer cells) and MCF7(breast cancer cells), and compound 2 exhibited better antitumor activity.     

希土硼氢化物的研究 Ⅹ.含[B_(10)H_9NH_2COCH=CH_2]~-的双苯甲酰丙酮缩1,3—丙二胺希土(Ⅲ)配合物的研究

将闭式+氢+硼酸阴离子酰胺衍生物[B_(10)H_9NH_2COCH=CH_2]~-、双苯甲酰丙酮缩1,3-丙二胺C_6H_5C(OH)=CHC(CH_3)=N(CH_3)CH=C(OH)C_6H_5(Bapn)及希土氯化物在丙酮-乙醇混合溶剂中进行反应,得到分子式为Ln(Bapn)_3[B_(10)H_9NH_2COCH=CH_2]_3(Ln=La,Nd,Sm,Eu,Gd,Dy)的混式配体希土配合物。通过元素分析、IR、~1H NMR及摩尔电导率的测定对配合物进行了表征,还通过DTA-TG方法研究了它们的热性质。     

二(β-二亚胺基)二价稀土配合物催化醛/酮与亚磷酸二乙酯的氢磷化反应

研究了一系列二(β-二亚胺基)二价稀土配合物[Eu(L~(2,6-ipr2))_2·CH_3C_6H_5,L~(2,6-ipr2)=[N(2,6-~(i)Pr_2C_6H_3)C(Me)]_2CH~-(1);Eu(L~(2,6-Me2))_2(THF),L~(2,6-Me2)=[N(2,6-Me_2C_6H_3)C(Me)]_2CH~-(2);Eu(L~(2,4,6-Me3))_2(THF),L~(2,4,6-Me3)=[N(2,4,6-Me_3C_6H_2)-C(Me)]_2CH~-(3);Eu(L~(2,6-ipr2)Ph)2,L~(2,6-ipr2)Ph=[(2,6-iPr_2C_6H3_)NC(Me)CHC(Me)N(C_6H_5)]–(4);Sm(L~(2,6-ipr2))_2·CH_3C_6H_5(5);Yb(L~(2,6-ipr2)Ph)2(6);Yb(L~(2-Me))2(THF),L~(2-Me)=[N(2-Me C6H4)C(Me)]2CH–(7)]对醛/酮与亚磷酸二乙酯的氢磷化反应的催化行为.发现所有配合物都可以在温和条件下,高效地催化芳醛以及杂环芳醛与亚磷酸二乙酯的氢磷化反应,在催化剂用量为0.08 mol%,25℃,无溶剂条件下反应5 min,α-羟基膦酸酯的收率可以达到90%~99%.催化活性有赖于β-二亚胺基的结构,其活性顺序为L~(2,6-Me2)L~(2,4,6-Me3)L~(2,6-ipr2)≈L~(2,6-ipr2)Ph.该催化体系具有优秀的醛底物适应能力.这类二价稀土配合物也可以有效地催化未活化的酮与亚磷酸二乙酯的反应,并显示良好的底物适应能力.     

2,6—二乙酰吡啶类双希夫碱配合物的研究——Ⅲ.Co(Ⅱ)、Ni(Ⅱ)、Zn(Ⅱ)、Pb(Ⅱ)和Cd(Ⅱ)配合物的合成和表征

制备了由2,6—二乙酰吡啶和肼基硫代甲酸酯衍生的希夫碱C_5H_3N[CH=NNHC(S)XR]_2(X=S,R=CH_3、C_6H_5CH_2;X=O,R=C_6H_5CH_2).离析出类型为MC_5H_3N[CH=NN=C(S)XR]_2(M=Co~(2+)、Ni~(2+)、Zn~(2+)、Pb~(2+)和Cd~(2+))的希夫碱配合物.配合物为元素分析、红外、可见—紫外光谱以及磁化率测量所表征.结果指出:上述希夫碱均为N_3S_2型五齿配体.     

2,6-二乙酰吡啶类双希夫碱配合物的研究——Ⅰ.VO(Ⅱ)、Mn(Ⅱ)、Fe(Ⅱ)和Fe(Ⅲ)配合物的合成和表征

制备了由2,6-二乙酰吡啶与肼基硫代甲酯衍生的希夫碱C_5H_3N[CH=NN=C(S)XR]_2(X=S,R=CH_3,C_6H_5CH_2;X=O,R=C_6H_5CH_2)。离析出类型为MC_5H_3N[CH=NN=C(S)XR]_2(M=VO~(2 )、Mn~(2 )和Fe~(2 ))和FeC_5H_3N[CH=NN=C(S)SR]_2Cl的希夫碱配合物。希夫碱及其配合物为元素分析、红外、可见一紫外光谱以及磁化率测量所表征,结果与所提出的Mn~(2 )、Fe~(2 )及Fe~(3 )配合物的结构一致.在VO(Ⅱ)配合物的情况,则形成多聚体,其结构为: -(N_3S_2)V-O-V(N_3S_2)-O-V(N_3S_2)-.     

某些含二茂铁基的酰氧基茂锆配合物的合成

本文由二氯二茂锆和二氯二(甲基环戊二烯基)锆与二茂铁羧酸钠盐反应合成了六种二茂铁酰氧基茂锆配合物,R_2ZrClY:R=C_5H_5,Y=FcCOO(1),FcCH_2COO(2),FcCOCH_2CH_2COO(3);R=CH_3C_5H_4,Y=FcCOO(4),FcCH_2C0O(5),FcCOCH_2CH_2COO(6)(Fc=二茂铁基)。     

两种β-二亚胺锡化合物的合成与表征（英文）

N,N-二(2,6-二异丙基苯基)-2,4-戊二亚胺的锂盐与二甲基二氯化锡的反应以及N,N-二(2,6-二乙基苯基)-2,4-戊二亚胺的锂盐与三甲基氯化锡的反应均以物质的量比为1∶1在室温下进行,分别得到了新化合物N(Ar)=C(Me)CH=C(NHAr)CH_2SnMe_2Cl·C_7H_8(1)(Ar=2,6-iPr_2C_6H_3)和[N(Ar')C(Me)=CHC(=NAr')CH_2SnMe_2]_2·CH_2Cl_2(2)(Ar'=2,6-Et_2C_6H_3).通常来说,β-二亚胺配体与金属卤化物反应容易形成氮-金属-氮键,而化合物1和2中由于SnMe_2Cl与SnMe_3基团的路易斯酸性使得锡-氮键断裂和锡-碳键的生成得到了少见的氮-锡-碳键.化合物2是罕见的具备两个共振结构式的锡二聚体.通过核磁共振、元素分析及X射线单晶衍射分析鉴定了这两种化合物的结构.通过这两个结构的对比探讨了二聚体2的形成机理.     

双核有机锡（IV）配合物[Ph_3Sn(CH_3OH)O_2CC_6H_4CO_2(CH_3OH)-SnPh_3]·2CH_3OH和[Ph_3SnS_2CN(CH_2CH_2)_2NCS_2SnPh_3]·2CH_3OH的合成、表征和晶体结构

利用三苯基氯化锡和对苯二甲酸二钠、哌嗪荒酸二钠在甲醇中反应，合成了双 核有机锡（IV）配合物[Ph_3Sn(CH_3OH)O_2CC_6H_4CO_2(CH_3OH)SnPh_3]· 2CH_3OH和[Ph_3SnS_2CN(CH_2CH_2)_2NCS_2SnPh_3]·2CH_3OH（2）。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射线单晶衍测定了这两个 化合物的晶体结构。化合物质1为单斜晶系，空间群P2_1/n，a = 1.5199(5) nm， b = 0.9000(3) nm，c = 1.8206(6) nm，β=113.970(5)°，Z = 2，V = 2.2755 (13) nm~3，D_c = 1.413 g/cm~3，μ = 1.146 mm~(-1)，F(000) = 980，R_1 = 0.0353，wR_2 = 0.0606。化合物2为单斜晶系，空间群P2_1/c，a = 1.5066(5) nm，b = 1.0875(4) nm，c = 1.3542(5) nm，β=91.614(5)°，Z = 2，V = 2. 2178(14) nm~3，D_c = 1.498 g/cm~3，μ=1.351 mm~(-1)，F(000) = 1008，R_1 = 0.0401，wR_2 = 0.1148。在1和2的晶体中，锡原子呈五配位畸变三角双锥构型 。配合物1由未配位的甲醇分子通过氢键作用形成二维网状结构。     

三烃基锡β-2,8,9-三氧杂-5-氮杂-1-锗杂三环[3.3.3.0~(1.5)] 一碳烷基(β-取代)丙酸酯的研究

本文合成了15个含锡锗杂(口恶)唑烷化合物,N(CH_2CH_2O)_3GeCHR~1CH_2CO_2SnR(R=Cy_3,Bu_3~n,Ph_3,Cy_2Bu~n,CyBu_2~n;R~1=H,C_6H_5,p-CH_3C_6H_4,p-ClC_6H_4).通过对产物的IR、~1H NMR、MS和元素分析的测定,确定了它们的组成和结构.三丁基锡羧酸酯具有五配位的结构.生物活性测定结果表明,这些化合物具有较好的杀螨和除草活性,同时对植物病原菌也有一定的防治效果.     

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.     

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.     

Facile synthesis of bicyclic 1-arylpyrazol-5-ones

In this Letter, we described a facile method for constructing fused bicyclic 1-arylpyrazol-5-one ring system. We employed various methylene-containing carboxylic acids as the substrates and proved that the pyrazolone ring closure requires activated methylene group in intermediate II. Accordingly, a series of structurally diversified, fused bicyclic 1-arylpyrazol-5-ones was prepared in moderate to high yields using the requisite substrates.     

A carbanion induced synthesis of highly congested pyrazole and imidazole containing heterocycles

An efficient approach to the synthesis of highly congested di, penta and hexacyclic pyrazoles as well as imidazole fragment containing novel heterocyclic molecule has been developed through a carbanion induced transformation of suitably functionalized 2H-pyran-2-ones, benzo[h]chromene and thiochromeno[4,3-b]pyrans. Due to the presence of fluorescence, we report their prime application metal sensor as off/on switching in ferric ions.     

Synthesis of pyrrolo[1,2-a]pyrazines and pyrazino[1,2-a]indoles by Curtius reaction in Morita-Baylis-Hillman derivatives

Synthesis of substituted pyrrolo[1,2-a]pyrazines and pyrazino[1,2-a]indoles from the Morita-Baylis-Hillman derivatives of acrylates via saponification followed by Curtius reaction is described.     

正丁胺对激光染料荧光谱影响的研究

用正丁胺作为碳源,采用射频辉光放电制备碳膜,选用激光染料R6G和聚乙二醇混合液作为蒸气源,采用单源热蒸发,在蒸发室与染料同时沉积得到混合膜,用拉曼光谱和红外光谱分析了碳膜的结构和键合方式,分析表明:碳膜中存在胺基团和氢原子.混合膜的荧光谱测量结果表明,认为正丁胺对染料荧光谱的影响是因为胺基和氢原子的存在.     

Selective synthesis of 4,5-dihydroimidazo- and imidazo[1,5-a]quinoxalines via modified Pictet–Spengler reaction

An efficient tandem approach for the selective synthesis of 4,5-dihydroimidazo[1,5-a]quinoxalines 6a–g and imidazo[1,5-a]quinoxalines 7a–h by the reaction of 2-imidazolyl anilines 4a–c with aryl aldehydes 5a–k under mild reaction conditions is described. Introduction of electron releasing alkyl groups in substrates 4a–b was found to be instrumental for the success of the reaction.     

Understanding the Diels-Alder reactivity of 1,2-azaborine analogues

The Diels-Alder reactivity of 1,2-heteroborines (H₄C₄B(H)X, X?=?NH, PH, AsH; O, S, Se) has been computationally explored by means of Density Functional Theory (DFT) calculations. The influence of the HB?=?X fragment on the reactivity of the system has been quantitatively analyzed in detail by means of the so-called Activation Strain Model (ASM) of reactivity. It is found that the interaction between these species and the dienophile is significantly stronger than that computed for their all-carbon isoelectronic counterpart, benzene. In addition, the strain energy plays a key role in the observed reactivity trends. The role of the aromaticity strength of these heteroarenes on the reactivity is also assessed.