阿拉善马先蒿中新木脂素甙成分研究

阿拉善马先蒿中新木脂素甙成分研究高建军，刘自民，王继和，贾忠建（兰州大学有机化学研究所应用有机化学国家重点实验室，兰州，７３００００）关键词阿拉善马先蒿，玄参科，新木脂素甙前文［１］报道了从阿拉善马先蒿（ＰｅｄｉｃｕｌａｒｉｓａｌａｓｃｈａｎｉｃａＭ...     

红纹马先蒿中木脂素衍生物成分研究

红纹马先蒿(Pedicularis striata)是玄参科马先蒿属植物,其主要成分为苯丙素甙。本文报道对该植物进一步研究中分离得到的2个微量甙类化合物,命名为红纹马先蒿甙A和B[Striatoside A(1)和B(2)]。     

牛尾蒿中—新倍半萜结构的确定

牛尾蒿中—新倍半萜结构的确定李瑜，杨立，师彦平（兰州大学应用有机化学国家重点实验室，兰州，７３００００）关键词牛尾蒿，倍半萜，牛尾蒿酮牛尾蒿（ＡｒｔｅｍｉｓｉａＳｕｂｄｉｇｉｔａｔａ）是菊科蒿属的一种多年生草本植物，广布于华北、东北、西北和西南等地区...     

生物活性天然产物讨论会在德举行

生物活性天然产物讨论会在德举行吴厚铭（中国科学院上海有机化学研究所上海２０００３２）ＴｈｅＳｙｍｐｏｓｉｕｍｏｎＢｉｏｌｏｇｉｃａｌｌｙＡｃｔｉｖｅＮａｔｕｒａｌＰｒｏｄｕｃｔｓＨｅｌｄａｔＨｏｈｅｎｈｅｌｍＵｎｉｖｅｒｓｉｔｙｏｆＧｅｒｍａｎｙＷｕ...     

马先蒿属植物苯丙素甙成分研究(Ⅱ)

马先蒿属(Pedicularis)植物广泛分布于西北和西南地区^[1].民间多用其根或茎入药,滋阴补肾^[2].本文报道从毛颏马先蒿(P.lasiophrys)中得到的马先蒿甙E(1)和从长花马先蒿(P.longifora)中分得的马先蒿甙Ⅰ(2).     

磺酰脲除草剂分子与受体作用的初级模型

磺酰脲除草剂分子与受体作用的初级模型赖城明，袁满雪，李正名，贾国锋，王玲秀（南开大学元素有机化学国家重点实验室化学系，天津，３０００７１）（南开大学元素有机化学研究所）关键词磺酰脲分子，受体作用模型，构效关系磺酰脲类具有超高效除草性能。Ｓｃｈｌｏｓｓ...     

斯德酮类化合物的合成及生物活性研究

斯德酮类化合物的合成及生物活性研究李正名，范传文，王素华（南开大学元素有机化学研究所，元素有机化学国家重点实验室，天津，３０００７１）关键词斯德酮，合成，生物活性斯德酮（Ｓｙｄｎｏｎｅ）化合物是一类介－离子（Ｍｅｓｏ－ｉｏｎｉｃ）化合物，由于其结构有...     

Controlled Radical Polymerization of Styrene in the Presence of Different Copper Complexes and Organic Halides

ＩｎｔｒｏｄｕｃｔｉｏｎＡｔｏｍｔｒａｎｓｆｅｒｒａｄｉｃａｌｐｏｌｙｍｅｒｉｚａｔｉｏｎ（ＡＴＲＰ）,ｂａｓｅｄｏｎｃｕｐｒｏｕｓｈａｌｉｄｅｓ（ＣｕＸ）／２,２－ｂｙｐｙｒｉｄｉｎｅ（ｂｐｙ）／ａｌｋｙｌｈａｌｉｄｅｓ（ＲＸ）ａｓｃａｔａｌｙｓｔ／ｉｎｉｔｉａｔｏｒｓｙｓｔｅｍ,ｉｓａｎｅｗｍｅｔｈｏｄｔｏｃｏｎｔｒｏｌｔｈｅｒａｄｉｃａｌｐｏｌｙｍｅｒｉｚａｔｉｏｎｏｆｓｔｙｒｅｎｅａｎｄ（ｍｅｔｈｙｌ）ｍｅｔｈａｃｒｙｌａｔｅ（ＭＭＡ）［１,２］．ＢｅｃａｕｓｅｔｈｅＣｕＣｌ／１,１０…     

Ordered Charge Distribution in Superconductor Tl-Ba-Ca-Cu-O

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｒｅｓｉｓｔｉｖｉｔｙρ（Ｔ）ｏｆｓｕｐｅｒｃｏｎｄｕｃｔｏｒｓｉｓｄｅｓｃｒｉｂｅｄａｓｆｏｌｌｏｗｓ［１］：κ（Ｔ＜Ｔｃ）ρ（Ｔ）＝ρ∥＝ＡＴ（Ｔ＞Ｔｃ,（ａｂｐｌａｎｅ）ρ⊥＝ＢＴ（Ｔ＞Ｔｃ,（ｃａｘｉｓ）（１）ＨｅｒｅＡ＜Ｂ．Ｅｘｐｒｅｓｓｉｏｎ（１）ａｃｃｕｒａｔｅｌｙｓｕｍｍａｒｉｅｓｕｐｔｈｅｒｅｓｉｓｔｉｖｉｔｙｔｈｒｏｕｇｈｍｅａｓｕｒｉｎｇｔｈｅａｎｉｓｏｔｒｏｐｙｃｏｎｄｕｃｔｉｖｉｔｙｏｆａｓｉｎｇｌｅｃｒｙｓｔａｌｏｆＹＢａ２Ｃｕ３Ｏ（７－…     

我国金属有机化学的研究已进入世界前沿

金属有机化学是无机化学和有机化学相互交叉渗透的学科,它的发展打破了传统的有机化学与无机化学的界限,成为一门新兴的学科和当代化学的前沿领域。５０年代初,二茂铁的发现与π键型夹心结构的阐明以及ＺｉｅｇｌｅｒＮａｔｔａ催化剂使乙烯在温和条件下聚合成功,使金属有机化学的发展出现了一个飞跃。自６０年代以来,先后已有８位从事金属有机化学研究的科学家（Ｋ．Ｚｉｅｇｌｅｒ,Ｇ．Ｎａｔｔａ,１９６３年;Ｅ．Ｏ．Ｆｉｓｃｈｅｒ,Ｇ．Ｗｉｌｋｉｎｓｏｎ,１９７３年;Ｗ．Ｎ．Ｌｉｐｓｃｏｍｂ,１９７６年;Ｈ．Ｃ．Ｂｒｏ…     

Self-assembly of diorganotin(IV) moieties and 2-pyrazinecarboxylic acid: syntheses, characterizations and crystal structures of monomeric, polymeric or trinuclear macrocyclic compounds

A series of diorganotin(IV) compounds of the type [R(2)Sn(pca)Cl](3)(R = CH(3); (n)Bu; C(6)H(5); C(6)H(5)CH(2); Hpca = 2-pyrazinecarboxylic acid), R(2)Sn(pca)(2)(mH(2)O)xnH(2)O (m= 1: R = CH(3), n= 2, R =(n)Bu, n= 0; m= 0, n= 0: R =(n)Bu, C(6)H(5), C(6)H(5)CH(2)) and (Et(3)NH)(+)[R(2)Sn(pca)(2)Cl](-)xmH(2)O (m= 0: R = CH(3), (n)Bu, C(6)H(5)CH(2); m= 1: R = C(6)H(5)) have been obtained by reactions of 2-pyrazinecarboxylic acid with diorganotin(iv) dichloride in the presence of sodium ethoxide or triethylamine. All compounds were characterized by elemental, IR and NMR spectra analyses. Except for compounds, and, the others were also characterized by X-ray crystallography diffraction analyses, which revealed that compounds and were trinuclear macrocyclic structures with six-coordinate tin(IV) atoms, compounds and were monomeric structures with seven-coordinate tin(IV) atoms, compounds and were polymeric chain structures with seven-coordinate tin(IV) atoms and compounds and were stannate with seven-coordinate tin(IV) atoms.     

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]十一碳烷基(β-取代)丙酸酯的研究

本文合成了15个含锡锗杂恶唑烷化合物,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、1^HNMR、MS和元素的分析测定, 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。     

The compounds of gold and palladium with rubeanic acid : Composition,structure and analytical use

Both palladium and gold (III) formed three insoluble compounds with rubeanic acid Me1R1, Me2R3 and Me3R2. The pH at which the compounds were formed was studied. Structural formulae for the compounds are presented. Methods are described for the determination of 1mg metal in 20 ml solution.     

Synthesis, characterization, and reaction of aluminum halide amides supported by a bulky beta-diketiminato ligand

Monomeric aluminum chloride amides with the general formula LAl(Cl)NR2 (1, R = Me; 2, R = iPr; 3, R = SiMe 3; L = HC[C(Me)N(Ar)]2; Ar = 2,6- iPr2C6H3) were prepared by selected routes. Treatment of LAlBr 2 (4) and LAlI2 with LiNMe2 yielded LAl(Br)NMe2 (5) and LAl(I)NMe2 (6), respectively. The alkylation of 1 and 2 with MeLi gave the corresponding methylated compounds LAl(Me)NR2 (7, R = Me; 8, R = iPr); however, no reaction of 3 with MeLi was observed because of steric hindrance. Subsequent fluorination of 1- 3 afforded LAl(F)NR2 (9, R = Me; 10, R = iPr; 11, R = SiMe3). Compounds 1-11 were characterized by multinuclear NMR, electron impact mass spectrometry, and IR. The constitution of compounds 1-3 was confirmed by single-crystal X-ray diffraction studies.     

Structures of new sesquiterpenoids from Farfarae Flos

Two new bisabolane-type sesquiterpenoids, (3R,4R,6S)-3,4-epoxybisabola-7(14),10-dien-2-one and (1R,3R,4R,5S,6S)-1-acetoxy-8-angeloyloxy-3,4-epoxy-5-hydroxybisabola-7(14),10-dien-2-one, and a new oplopane-type sesquiterpenoid, 14(R)-hydroxy-7beta-isovaleroyloxyoplop-8(10)-en-2-one, were isolated from Farfarae Flos along with three known compounds. The structures of these compounds were elucidated on the basis of spectroscopic evidence.     

α-(1H-1,2,4-三唑-1-基)-β-芳硫基取代苯酮的合成及生物活性研究

利用 2 (1H 1,2 ,4 三唑 1 基 ) 2 丙烯 1 酮 (2 )与取代硫酚或含巯基的杂环化合物进行 1,4 亲核加成 ,得到目标化合物 3,其结构经元素分析、核磁和红外光谱所证实 ,并对其进行了生物活性的测试 ,发现大部分化合物具有很好的抑菌活性 .结构与活性的关系表明不同的R1取代对其生物活性有较大的影响 ,当R1=(CH3 ) 3 C时 ,对小麦锈病的抑制活性要高于R1=Ar的活性 ,而Ar上不同的取代基对其活性影响不大     

Indenyl zirconium dinitrogen chemistry: N2 coordination to an isolated zirconium sandwich and synthesis of side-on, end-on dinitrogen compounds

Exposure of the isolable zirconocene sandwich compounds, (eta(5)-C5Me5)(eta(5)-C9H5-1-R(1)-3-R(2))Zr (R(1) = Me, (i)Pr, (t)Bu; R(2) = Me) to one atmosphere of dinitrogen resulted in N2 coordination. X-ray diffraction and NMR spectroscopy establish that the resulting dimeric dinitrogen compounds contain an unusual mu2,eta(2)-bridging indenyl ring and a weakly activated N2 ligand. N2 coordination from the isolable zirconium sandwich compounds is extremely sensitive to the number and size of the indenyl subsituents. Compounds bearing two [(i)Pr] or three methyl substituents are stable as eta(9) sandwich compounds for weeks under dinitrogen likely due to the inability to dimerize through a two-atom N2 bridge. Performing the reduction of (eta(5)-C5Me5)(eta(5)-C9H5-1-R(1)-3-R(2))ZrCl2 (R(1) = (i)Pr, (t)Bu; R(2) = Me; R(1) = R(2) = SiMe3) under an N2 atmosphere produced a different outcome; rare examples of side-on, end-on zirconium dinitrogen compounds were isolated and in one case, crystallographically characterized. Protonolysis studies with weak Br?nsted acids were used to evaluate the relative activation of the bridging dinitrogen ligands.     

Synthesis, chemical characterization and biological screening for cytotoxicity and antitumor activity of organotin (IV) derivatives of 3,4-methylenedioxy 6-nitrophenylpropenoic acid

A series of mono-, di- and triorganotin compounds with general formulae [RSnL(2)Cl], R = Bu (compound 3), [R(2)SnL(2)], where R = Me, Et, Bu, Oct (compounds 1, 2, 4 and 6) and [R(3)SnL], where R = Bu, Cy and Ph (compounds 5, 7 and 8) and where L = 3,4-methylenedioxy-6-nitrophenylpropenoic acid have been prepared and characterized by elemental analysis, multinuclear ((1)H-, (13)C- and (119)Sn-) NMR and mass spectrometry. The ligand and its respective organotin complexes were screened for cytotoxicity using the brine shrimp lethality assay and for antitumor activity using the crown gall tumor inhibition (potato disc) assay. The bioassay results support the conclusion that the biological activities of these synthetic compounds are in the following order: [RSnL(2)Cl] < [R(2)SnL(2)] < [R(3)SnL].     

酪胺的磷(膦)酰化反应及其衍生物合成的研究

本文合成了O-烷基(或O-取代苯基)-O-烷基(或苯基)-N-(对-羟基-β-苯乙胺基)硫代磷(膦)酰胺酯及O,N-双[O-烷基(或O-取代烷基)-O-烷基(或苯基)硫代磷(膦)酰基]对-羟基-β-苯乙胺32个新化合物,讨论了氮优先磷酰化,研究了不同碱的催化机理及磷(膦)酰化试剂对酪胺反应选择性差别。通过元素分析、IR、1H NMR及MS证明了结构。生物初筛表明部分化合物有杀虫活性。     

Turpinionosides A-E: megastigmane glucosides from leaves of Turpinia ternata Nakai

From leaves of Turpenia ternata (Staphylaceae), one megastigmane and seven of its glucosides (1-8) were isolated. Megastigmane and two of the glucosides were found to be known compounds, namely, 3S,5R,6R,9S-tetrahydroxymegastigmane (1), corchoionoside C (2), and icariside B4 (3). The structures of compounds 4-8 (turpinionosides A-E, respectively) were elucidated by means of spectroscopic analyses, and then their absolute structures were determined by the modified Mosher's method to be (3S,5R,6S,9S)-3,6,9-trihydroxymegastigman-7-ene 3-O- and 9-O-beta-D-glucopyranosides (4, 5, respectively), (1S,3S,5R,6S,9R)-3,9,12-trihydroxymegastigmane 3-O-beta-D-glucopyranoside (6), (3S,4R,9R)-3,4,6-trihydroxymegastigman-5-ene 3-O-beta-D-glucopyranoside (7), and (2S,9R)-2,9-dihydroxymegastigman-5-en-4-one 2-O-beta-D-glucopyranoside (8).