含吡唑啉酮氨基脲类化合物的合成及结构

以1-苯基-3-甲基-吡唑啉酮-5 (PMP)和1,3-二苯基-吡唑啉酮-5 (DPP)为原料合成了六种4-酰基吡唑啉酮,并分别与氨基脲缩合,得到六个新的含吡唑啉酮环的缩氨基脲类化合物.用IR, ¹H NMR和¹³C NMR对各化合物进行了表征及结构确证,并用X射线单晶衍射法测定了化合物1c [1-苯基-3-甲基-4-丙酰基-吡唑啉酮-5缩氨基脲(PMPP-SC)]的晶体结构.     

取代基对吡唑衍生物发光行为的影响

对两种带有不同取代基吡唑啉化合物的光谱和光物理行为进行了比较研究．结果表明,吡唑啉环３－位处所联基团推一拉电子能力的改变对化合物的荧光量子产率、荧光猝灭等有巨大影响．这是由吡唑啉化合物本身的结构特征所决定的．     

吡唑啉酮衍生物及其金属配合物抗肿瘤研究进展

综述了吡唑啉酮衍生物及其金属配合物抗肿瘤生物活性国内外研究进展,主要包括吡唑啉酮衍生物及其金属配合物抗肿瘤生物活性,及其活性作用机制。展望了吡唑啉酮衍生物及其金属配合物抗肿瘤活性研究的发展方向。     

吡咯酰胺催化合成吡唑啉酮衍生物

探究了绿色高效合成医药价值较高的吡唑啉酮衍生物的方法,即：以吡咯酰胺催化吡唑啉酮与硝基烯进行Michael反应,高收率地合成了系列吡唑啉酮衍生物,其结构经¹H NMR和¹³C NMR确证。并考察了催化剂及其用量、溶剂和温度对反应的影响。结果表明;在室温下,CH₂Cl₂体系中,在10 mmol%催化剂E存在下,吡唑啉酮与硝基烯烃能有效进行Michael反应,收率80%~91%。     

含"单"及"双"吡唑啉基化合物的光致发光和电致发光的比较研究

对7种含"单"或"双"吡唑啉化合物在溶液和在固体器件[ITO/TPD/TPBI-2%EP/TPBI/Mg-Ag]中作为掺杂发光材料的电致发光特性进行了研究.结果表明,由吡唑啉化合物所构成的器件具有优良的电致发光特性.特别是在5-位处联有芳基的双吡唑啉化合物,由于它们具有良好的成膜能力和较高的玻璃化转变温度,因此所制得的器件有很好的稳定性.结果还表明,含双吡唑啉基化合物的荧光量子产率较含单吡唑啉基者为低.由它们所构成器件的电致发光能力也大体反映出相同的趋势.     

芳酸偶氮吡唑啉酮及其麻黄碱盐的合成

近期报道了吡唑啉酮衍生物与稀土金属的络合作用。关于4-芳基偶氮吡唑啉酮与过渡金属络合的作用已有报道,但与稀土金属络合的文献不多。根据英国药典,麻黄碱与铜离子络合呈色而作为其鉴定方法,本文制备了麻黄碱类与芳酸偶氮吡唑啉酮形成的盐,以备研究它们的络合作用。在合成的5种吡唑啉酮衍生物中,本文利用PH     

含酰基吡唑啉酮和咔唑光功能基元的新型席夫碱的合成

以苯肼、乙酰乙酸乙酯和咔唑为原料,合成了一种含酰基吡唑啉酮和咔唑双光功能基元的新型席夫碱———1-苯基-3-甲基-4-苯甲酰基-吡唑啉酮-5缩N-对氨基苄基咔唑(6),其结构经1H NMR和IR确证;采用UV-vis对其电子结构进行了初步研究,与酰基吡唑啉酮或咔唑功能基元相比,6表现出特殊的电子结构。     

一种新的双吡唑啉酮化合物的合成及晶体结构

4-酰基吡唑啉酮是一类含有氮杂环的β-二酮型螯合剂,近几十年来,国内外对该类化合物及其衍生物进行了广泛的研究[1-3].本室验室曾合成了一系列4-苯甲酰基吡唑啉酮缩氨基硫脲及其衍生物,发现这类含硫席夫碱具有光致变色性,并对其变色机理和反应动力学进行了详细研究[4,5].作为工作的继续,我们又合成了1-苯基-3-甲基-4-乙酰基-5-吡唑啉酮缩硫甲基氨基硫脲(PMEP-MTTSC),虽然此化合物不具有光致变色性,但在培养其单晶的过程中,却意外地得到了一种双吡唑啉酮化合物.当用不同的溶剂来培养其单晶时,又得到了这种双吡唑啉酮的一对互变色异构体.反应过程如下:     

5-位取代吡唑啉化合物的发光行为及其在电致发光领域中的应用

合成了一系列5位不同取代的2－吡唑啉化合物，研究了取代基对吡唑啉化合物 物理性质的影响。结果表明，在吡唑啉化合物的5位引入稠环取代基提高了吡唑啉 化合物的熔点；同时，5位取代基的电位性质还影响着化合物的发光行为。DSC差热 分析结果给出1，3－二苯基－5－（9－菲基）－2－吡唑啉（TAP7）的玻璃化温度 (T_g)为96 ℃；并研究了其在电致发光器件上的应用性能。结果表明TAP7是一种具 有高热稳定性的空穴传输及蓝光发光材料。     

无溶剂无催化剂微波促进下 1-苯基-3-甲基-5-吡唑啉酮与芳醛的反应研究

无溶剂无催化剂条件下,微波促进1-苯基-3-甲基-5-吡唑啉酮与芳醛的缩合反应选择不同辐射功率将分别得到4-芳亚甲基-3-甲基-1-苯基-5-吡唑啉酮和4,4′-芳亚甲基-双(1-苯基-3-甲基-5-吡唑啉酮),产率良好.产物结构经1H NMR,13CNMR和IR进行了表征.     

含吡啶基四硫富瓦烯衍生物的合成、 结构和电化学性质

在乙酰乙酸乙酯和氧化亚铜共同催化下, 二-(1,3-二硫环戊烯-2-硫酮-4,5-二硫)合锌酸四乙基铵盐分别与2-碘吡啶(1a)、 3-碘吡啶(1b)和4-碘吡啶(1c)反应, 制得硫酮化合物2,3-二(2-吡啶硫基)-1,3-二硫环戊烯-2-硫酮(2a)、 2,3-二(3-吡啶硫基)-1,3-二硫环戊烯-2-硫酮(2b)和2,3-二(4-吡啶硫基)-1,3-二硫环戊烯-2-硫酮(2c). 在醋酸汞催化下, 硫酮化合物2a, 2b和2c分别被氧化为2,3-二(2-吡啶硫基)-1,3-二硫环戊烯-2-酮(3a)、 2,3-二(3-吡啶硫基)-1,3-二硫环戊烯-2-酮(3b)和2,3-二(4-吡啶硫基)-1,3-二硫环戊烯-2-酮(3c). 以亚磷酸三乙酯为偶联剂, 氧酮化合物3a, 3b和3c分别发生自偶联反应生成2,3,6,7-四(2-吡啶硫基)四硫富瓦烯(4a)、 2,3,6,7-四(3-吡啶硫基)四硫富瓦烯(4b)和2,3,6,7-四(4-吡啶硫基)四硫富瓦烯(4c). 采用核磁共振波谱(NMR)、 傅里叶变换红外光谱(FTIR)和质谱(MS)分析了所合成化合物的结构和组成, 通过X射线衍射分析确认了吡啶基四硫富瓦烯衍生物4b和4c的晶体结构. 循环伏安法研究结果表明, 化合物4a, 4b和4c呈现准可逆的两电子转移过程, 结合量子化学计算, 分析了不同位置取代的吡啶基对四硫富瓦烯电化学电势的影响.     

Flavonoid glycosides and other constituents of Psorospermum androsaemifolium BAKER (Clusiaceae)

Two new flavonoid glycosides, namely 3'-(2',4'-dihydroxybenzyloxy)acanthophorin B (1b) and beta,2,3',4,4',6-hexahydroxy-alpha-(alpha-L-rhamnopyranosyl)dihydrochalcone (2) were isolated from the leaves of Psorospermum androsaemifolium together with quercetin (1), acanthophorin B (1a), alpha- (3) and beta-amyrine (3a), vismiaquinone (4), 12-hentriacontanol and hentriacontane. The structures of these secondary metabolites were established using detailed spectroscopic analysis and by comparison with published data. Compounds 1, 1a, 1b, 2, 3, 3a and 4 showed weak antifungal and antibacterial activities.     

叔丁基取代的环戊二烯基钛、锆、铪二氯化物的合成及催化乙烯聚合

(tBuC5H4 ) 2 MCl2 (M =Ti(1a) ,Zr(1b) ,Hf(1c) )和 (tBu2 C5H3 ) 2 MCl2 (M =Ti(2a) ,Zr(2b) ,Hf(2c) )可以通过单叔丁基环戊二烯基锂或双叔丁基环戊二烯基锂与MCl4 (M =Ti,Zr,Hf)在四氢呋喃中反应制备得到 ,用IR、1H NMR和EI MS对这些化合物进行了表征 .采用X光单晶结构分析测定了 (tBuC5H4 ) 2 HfCl2 的晶体结构 .六个化合物均具有一定的催化乙烯聚合活性     

Neutral pentacoordinate silicon fluorides derived from amidinate, guanidinate, and triazapentadienate ligands and base-induced disproportionation of Si2Cl6 to stable silylenes

Pentacoordinate silicon fluorides L(1)SiF(3) (2a), L(2)SiF(3) (2b), and (L(3)SiF(2))(2) (2c)(2) based on amidinate (L(1) = PhC(N(t)Bu)(2)), guanidinate (L(2) = 1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidinate), and triazapentadienate (L(3) = NC(NMe(2))NC(NMe(2))NAr; Ar = 2,6-(i)Pr(2)C(6)H(3)) ligands were prepared by fluorination of the corresponding chlorosilanes L(1)SiCl(3) (1a), L(2)SiCl(3) (1b), and L(3)SiCl(2) (1c) with Me(3)SnF at ambient temperature. Compounds 1b, 1c, 2a, 2b, and (2c)(2) were characterized by (1)H, (13)C, (19)F, and (29)Si NMR spectroscopic studies. Molecular structures of 1b, 1c, 2a, and (2c)(2) were determined by single crystal X-ray structural analysis. Invariom refinement involving non-spherical scattering factors of the Hansen-Coppens multipole model was performed for 1b. Compound L(3)SiF(2) (2c) is dimeric both in the solid state and in solution, whereas its chloro-analogue 1c is monomeric. The attempted synthesis of diamidinatotetrachlorodisilane by reaction of lithium amidinate with Si(2)Cl(6) led to the formation of the silane (1a) and the silylene L(1)SiCl (3). Reaction of Si(2)Cl(6) with N-heterocyclic carbenes (NHC) afforded NHC adducts of dichlorosilylene and SiCl(4). A one pot method for the preparation of base-stabilized silylenes from Si(2)Cl(6) is discussed.     

间氯苯基锰卟啉-5-氟尿嘧啶配合物的合成及其对癌细胞的抑制活性

合成了4种新5-氟尿嘧啶-卟啉衍生物：5-[3-(2-(5-氟尿嘧啶-1-基)乙氧基)苯基]-10,15,20-三(3-氯苯基)卟啉(1a)、5-[3-(2-(5-氟尿嘧啶-1-基)乙氧基)苯基]- 10,15,20-三(3-氯苯基)锰卟啉(2a)、5-[3-(3-(5-氟尿嘧啶-1-基)丙氧基)苯基]-10,15,20-三(3-氯苯基)锰卟啉(2b)和5-[3-(4-(5-氟尿嘧啶-1-基)丁氧基)苯基]-10,15,20-三(3-氯苯基)锰卟啉(2c),通过UV-Vis、IR、MS及元素分析表征了它们的结构。 用噻唑蓝法（MTT法）测定了化合物2a、2b和2c对人胃癌细胞株BGC-823的抑制活性。 化合物2b的半数抑制浓度IC50为1.34 μmol/L,表明有一定的细胞毒作用。     

Friedlnder反应合成2-(2-羟基苯基)-6,7-亚甲二氧基喹啉及其衍生物

以 6 氨基胡椒醛为原料 ,与邻羟基苯乙酮 (2a) ,4 氯 2 羟基苯乙酮 (2b)发生Friedl nder缩合反应 ,得到新的喹啉衍生物 2 (2 羟基苯基 ) 6 ,7 亚甲二氧基喹啉 (3a)和 2 (5 氯 2 羟基苯基 ) 6 ,7 亚甲二氧基喹啉 (3b) .新的喹啉衍生物 3a～ 3b分别经IR红外光谱 ,1 HNMR核磁共振谱 ,MS质谱 ,元素分析予以证实     

新型的含硫族元素碳硼烷配体的三(3，5-二甲基-1-吡唑)硼氢钼配合物的合成和分子结构(英)

三齿单核三(3，5-二甲基-1-吡唑)硼氢钼配合物Tp^*Mo(O)Cl₂ (1)(Tp^*=三(3，5-二甲基-1-吡唑)硼氢HB(C₃H(Me₂)N₂)₃)与含硫族元素碳硼烷的锂盐[(THF)₂LiE₂C₂B₁₀H₁₀(THF)]<     

Synthesis of monoglucosylated high-mannose-type dodecasaccharide,a putative ligand for molecular chaperone,calnexin, and calreticulin

Convergent and stereoselective synthetic routes to Man9GlcNAc2 (1b), alpha-Glc1M9GlcNAc2 (2b), and its stereoisomer beta-Glc1M9GlcNAc2 (3) were established. Interaction analysis of 2b with CRT was measured by 1H NMR spectroscopy, and the first NMR-based evidence for the specific binding of CRT to 2b was obtained.     

Trimerization of NaC2N3 to Na3C6N9 in the solid: ab initio crystal structure determination of two polymorphs of NaC2N3 and of Na3C6N9 from X-ray powder diffractometry

Sodium dicyanamide NaC2N3 was found to undergo two phase transitions. According to thermal analysis and temperature-dependent X-ray powder diffractometry, the transition of alpha-NaC2N3 (1a) to beta-NaC2N3 (1b) occurs at 33 degrees C and is displacive. 1a crystallizes in the monoclinic system, space group P21/n (no. 14), with a = 647.7(1), b = 1494.8(3), c = 357.25(7) pm, beta = 93.496(1) degrees, and Z = 4. The structure was solved from powder diffraction data (Cu Kalpha1, T = 22 degrees C) using direct methods and it was refined by the Rietveld method. The final agreement factors were wRp = 0.072, Rp = 0.053, and RF = 0.074. 1b crystallizes in the orthorhombic system, space group Pbnm (no. 62), with a = 650.15(5), b = 1495.1(2), c = 360.50(3) pm, and Z = 4. The structure was refined by the Rietveld method using the atomic coordinates of 1a as starting values (Mo Kalpha1, T = 150 degrees C). The final agreement factors were wRp = 0.044, Rp = 0.034, RF = 0.140. The crystal structures of both polymorphs contain sheets of Na+ and N(CN)2- ions which are in la nearly and in 1b exactly coplanar. Above 340 degrees C, 1b trimerizes in the solid to Na3C6N9 (2). 2 crystallizes in the monoclinic system, space group P21/n (no. 14), with a = 1104.82(1), b = 2338.06(3), c = 351.616(3) pm, beta = 97.9132(9)degrees, and Z = 4. The structure was solved from synchrotron powder diffraction data (lambda = 59.733 pm) using direct methods and it was refined by the Rietveld method. The final agreement factors were wRp = 0.080, Rp = 0.059, and RF = 0.080. The compound contains Na+ and the planar tricyanomelaminate C6N9(3-). The phase transition from 1b to 2 is reconstructive. It occurs in the solid-state without involvement of other phases or intermediates. The crystal structures of 1b and 2 indicate that there is no preorientation of the N(CN)2- in the solid before their trimerization to C6N9(3-).     

Dynamics in host-guest complexes of molecular tweezers and clips

The dynamics in the host-guest complexes of the molecular tweezers 1 a,b and clips 2 a,b with 1,2,4,5-tetracyanobenzene (TCNB, 3) and tropylium tetrafluoroborate (4) as guest molecules were analyzed by temperature-dependent 1H NMR spectroscopy. The TCNB complexes of tweezers 1 a,b were found to be particularly stable (dissociation barrier: DeltaG(++)=16.8 and 15.7 kcal mol(-1), respectively), more stable than the TCNB complexes of clips 2 a,b and the tropylium complex of tweezer 1 b (dissociation barrier: DeltaG(++)=12.4, 11.2, and 12.3 kcal mol(-1), respectively). A detailed analysis of the kinetic and thermodynamic data (especially the negative entropies of activation found for complex dissociation) suggests that in the transition state of dissociation the guest molecule is still clipped between the aromatic tips of the host molecule. The 1H NMR analysis of the TCNB complexes 3@1 b and 3@2 a at low temperatures (T<-80 degrees C) showed that 3 undergoes fast rotation inside the cavity of tweezer 1 b or clip 2 a (rotational barrier: DeltaG( not equal)=11.7 and 8.3 kcal mol(-1), respectively). This rotation of a guest molecule inside the host cavity can be considered to be the dynamic equilibration of noncovalent conformers. In the case of clip complex 3@2 a the association and rotational barriers are smaller by DeltaDeltaG(++)=3-4 kcal mol(-1) than those in tweezer complexes 3@1 a,b. This can be explained by the more open topology of the trimethylene-bridged clips compared to the tetramethylene-bridged tweezers. Finally, the bromo substituents in the newly prepared clip 2 b have a substantial effect on the kinetics and thermodynamics of complex formation. Clip 2 b forms weaker complexes with (TCNB, 3) and tetracyanoquinodimethane (TCNQ, 12) and a more stable complex with 2,4,7-trinitrofluoren-9-ylidene (TNF, 13) than the parent clip 2 a. These results can be explained by a less negative electrostatic potential surface (EPS) inside the cavity and a larger van der Waals contact surface of 2 b compared to 2 a. In the case of the highly electron-deficient guest molecules TCNB and TCNQ the attractive electrostatic interaction is predominant and hence responsible for the thermodynamic complex stability, whereas in the case of TNF with its extended pi system, dispersion forces are more important for host-guest binding.