diene相关论文
Diazo Esters as Dienophiles in Intramolecular(4+2)Cycloadditions:Computational Explorations of Mecha
The first experimental examples of Diels–Alder(DA)reactions of diazo compounds as heterodienophiles with dienes have be......
A rapid and efficient synthesis of substituted phthalic acid derivatives in solvent-free via microwa
Multicomponent reactions (MCRs) which directly yield the desired products via domino or tandem reaction sequences offer ......
<正> Ⅰ. INTRODUCTION The photocycloaddition reactions of 1,3-dimethyl-6-azathymine with heptene-1 and cyclohexene have ......
Chemical constituents from the submerged plant Potamogeton crispus and their effects on NAD(P)H:quin
A new isopimarane-type diterpene(liwariverol,1) and eight known compounds were isolated and characterized from the EtOAc......
A new triterpene saponin with 28-nor-urs-12(13),18(17)-dien-3β-ol as aglycone,named ilexsaponin C(1) was isolated from ......
New steroidal sapogenins from the acid hydrolysis product of the whole glycoside mixture of Welsh on
Two new steroidal sapogenins(1,2) along with five known steroidal sapogenins were isolated from the acid hydrolysis prod......
The reduction of diphenylacetylene with lithium naphthalenide produced two kinds of intermediates,1 or 2,depending on th......
目的:研究恒山黄芪内生真菌的次生代谢产物。方法:采用反复硅胶柱色谱法结合羟丙基葡聚糖凝胶(Sephadex LH-20)色谱法等进行分离纯......
目的研究平颏海蛇干体的化学成分。方法采用硅胶柱色谱、凝胶柱色谱、重结晶等方法进行分离纯化,根据理化性质和波谱数据鉴定化合......
Palladium-catalyzed synthesis of 1,2,3,4-tetraalkyl-1,4-diarylbutadienes by cross-coupling of zircon
A novel method for the synthesis of 1,2,3,4-tetraalkyl-1,4-diarylbutadienes was developed via palladiumcatalyzed cross-c......
目的:研究三脉紫菀挥发油的化学组成及相对含量。方法:采用水蒸气蒸馏法提取三脉紫菀叶中的挥发油,并通过气相色谱-质谱(GC-MS)联......
Theoretical insights into the [4+2]/retro [4+2] cycloaddition approach to the synthesis of biaryls a
A domino [4+2]/retro [4+2] cycloaddition process of cyclohexadienes with arylethynes or benzyne providing access to biar......
ACYCLIC DIENE METATHESIS POLYMERIZATION OF TAILOR-MADE MONOMERS TOWARDS SEQUENCE-REGULATED VINYL COP
Acyclic diene metathesis polymerization (ADMET) enables convenient transfer of sequential information of the designed mo......
Tandem intramolecular Diels–Alder/retro-Diels–Alder cycloaddition of 2H-chromen-2-one as dienes with
To study the intramolecular Diels-Alder cycloadditon of 2H-chromen-2-one as a diene,a series of chiral N-allyl-N-benzyla......
Mononuclear and Dinuclear Yttrium Complexes Supported by Pyrrolide Ligands: Syntheses, Structures an
The syntheses, structures and catalytic activities of two yttrium complexes supported by pyrrolide ligands are reported.......
Herein we reported that ferrocene-containing polymers could be synthesized via acyclic diene metathesis(ADMET) polymeriz......
采用硅胶、聚酰胺层析方法从构棘果中分离得到了4个苯并吡喃异黄酮alpinumisoflavone(1)、4’-O-methylalpinmumisoflavone(2)、4......
24s-Stigmasta, 4,25-diene,3β.6β-diol 1,a new sterol has been isolated from the algae haurencia majuscula collected fro......
Exchange Interaction of a Novel Heterospin Polynuclear Complex Containing Transition Metals and Imin
A novel heterospin complex {[(CuL)Ni(IM 2Py) 2](ClO 4) 2} 2·2H 2O (L=2,3 dioxo 5,6:14,15 dibenzo 1,4,8,12 te......
Synthesis of Dendritic Schiff Base Ligands for Titanium Catalyzed Enantioselective HDA Reaction of D
A new type of dendritic NOBIN derived Schiff base ligands hasbeen synthesized and applied to titanium catalyzed hetero-......
Studies on the method of total synthesis of koumine——Ⅰ.4-Substituted 1,2-dihydropyridine derivatives
A route to the total synthesis of koumine has been suggested.Five 4-substituted 1,2-dihydropyridine derivatives,which a......
Studies on olefin-coordinating transition metal carbene complexes——Ⅴ.Synthesis,spectra and crystal s
Recently,we have reported the reaction of butadiene-and isoprene(tricarbonyl)iron,in which the olefin ligand is a strai......
Studies on the synthesis, spectra and structure of isomerized products of isopentadiene(dicarbonyl)-
Reaction of π-isopentadienetricarbonyliron (1) with aryl lithium ArLi (Ar = phenyl,p-tolyl, p-methoxyphenyl, p-trifluo......
Adosomus sp.eats the leaves and oviposits on the stems of Artemisia ordosica Krasch.Based on an analytical PTI-GC/MS met......
本文综述了紫杉醇的生物合成途径、代谢调控及基因工程方面的研究进展,总结了代谢调控与基因工程方法提高红豆杉属植物细胞培养紫......
The preparation of C3-C14 fragment of the dienophile unit of methyl sartotuoate is described.The key steps included Rou......
Synthetic studies towards(he C(3)-C(13)and C(14)-C(24)segments(3,4)of the potent antiviral and antitumor compound macro......
A new taxane diterpenoid with a rearranged 5/7/6-membered ring system was isolated from the seeds of the Chinese yew. Ta......
Two new lanosta triterpenoids, 3β,22α -dihydroxy-lanosta-8,24E-diene-25-peroxide, 3β,22α,25-trihydroxy lanosta-8,24E......
Two new sterols, 3β,7α, 16β-trihydroxy-stigmast-5,22-diene 1, 3β,7α, 16β-trihydroxy-stigmast-5-ene 2, were isolate......
【正】 On July 23rd,SCG-Dow Group,a joint venture of The Dow Chemical Company (Dow) and Siam Cement Group (SCG) announce......
Butadiene is an important basic organic raw material in the petroleum and chemical industry.Its position among olefin r......
【正】 Increase of Supply Gap The only large ethylene-propylene rub-ber(EPR)unit in China-q20000 t/a-qwasbuilt by Petro ......
Crystal Structure of a Copper(II) Complex with 2,3-Dioxo-5,6:13,14-dibenzo-9-methyl-7,12-bis(ethoxyc
The molecular and crystal structure of a macrocyclic N,N′-substituted- oxamidocopper(II) complex, [CuL], where H2L = 2,......
Saikosaponin v-2(1), was isolated from the roots of the title plant and the structure was identified on the basis of spe......
Synthesis and Crystal Structure of 2-(Diphenylphosphine oxide)-3-(diphenylphosphine oxide ethynyl) s
The Diels-Alder reaction of bis(diphenylphosphine oxide)butadiyne (BDPPOB) with spiro[2.4]hepta-4,6-diene affords the t......
A new furostanol saponin presenting moderate bioactivity of inducing morphological deformation of Pyricularia oryzae myc......
The different regioselective and stereoselective products were obtained by the reduction of stigmast-4,22-dien-3,6-dione......
Polyvinylpyrrolidone/ethylene-propylene-diene terpolymer (PVP/EPDM) sheath/core fibers, with the incorporation of Eu(TTA......
Reduced antioxidant level and increased oxidative damage in intact liver lobes during ischaemia-repe
AIM:To determine whether increased blood flow of theliver can cause oxidative stress and hepatocyte damage,and to elabo......
In the present study, a new ceramide, namely 2S, 3R-4E, 8E-2-(heptadecanoylamino)-heptadeca-4, 8-diene-1, 3-diol(1), alo......
N-alkylamide profiling of Achillea ptarmica and Achillea millefolium extracts by liquid and gas chro
Achillea millefolium and Achillea ptarmica are both plants belonging to the Asteracea family and are traditionally used ......
从西洋参中分得10种单体,经与已知标准品对照。质谱(FD-MS)和~(13)C-核磁共振光谱鉴定为人参皂甙-Ro、Rb_1、-Rb_2、-Rc、-Rd、-Re......
我们曾介绍过国内外近年对红豆蔻的研究成果,但在投稿后,系川秀治等先后又从红豆蔻中分离出一些新的或带活性的成分。趁着前报刚......
从西洋参中分离得10种化合物,经与已知标准品对照、质谱(FD—MS)、红外光谱和~(13)C-核磁共振谱鉴定为人参皂甙-R_O、-Rb_1、-Rb_2......
The roots of oplopanax elatus NAKAI (Chinese name, Cirensen) (Araliaceae) have been used as a medicine in China for ton......
