Synthesis of

A series of 1,1'-dicinnamoylferrocenes were converted to the corresponding [3]ferrocenophane diols (4a-e) in a stereoselective manner by using samarium diiodide to effect the intramolecular coupling reaction, aldol reaction, and reduction in one-pot operation. The major reaction pathway might be derived from a samarium chelated transition state (I(A)()) having the moieties of s-cis enone and (Z)-enolate. A solid-state structure of such [3]ferrocenophane diol product showed that the cyclopentadienyl groups were in an eclipsed orientation and slightly tilted.     

微波作用下1,5-苯并硫氮杂-α-溴代-β-内酰胺衍生物的合成

1,5-苯并硫氮杂     

发散法合成树枝状高分子聚酰胺-胺

采用发散法,以乙二胺为原料,通过与丙烯酸甲酯和乙二胺进行Mickeal加成和酰胺化缩合反应,合成了以乙二胺为核、支化代为1.0的树枝状高分子聚酰胺一胺,讨论了反应温度、反应时间和投料摩尔比等因素对反应的影响,同时讨论了该反应的特点。结果表明：适宜的反应温度为25℃,反应时间为24h,投料比为mol0.5代PAMAM：mol乙二胺＝1：24,在此条件下,产品的产率为99.9%,纯度在995以上。     

N-酰基吡唑类化合物的制备及其在合成中的应用

N-酰基吡唑类化合物作为酰化试剂逐步引起了广泛关注,对其制备以及在醇解,氨解,格氏反应,瑞福尔马斯基反应等方面的用途做了探讨.     

多官能团分枝状化合物的合成研究：Ⅴ.多烯烃体系的合成

以六溴甲基苯为核心,季戊四醇三烯丙基醚为支化单元,采用收敛法合成了六方向,具有１８个末端烯丙基的多烯烃体系。     

Synthesis of heterocycles : Synthesis of 4H-1,4-benzothiazines

A new synthesis of fluorinated 4H-1,4-benzothiazines is being reported for the first time, obtained by condensing O-aminobenzenethiol with fluorinated β-diketones. An oxidative cyclisation mechanism, involving an intramolecular nucleophilic attack in an intermediate enamine system is suggested.     

烯胺酮的合成及其在有机合成中的应用

烯胺酮是目前应用较为广泛的有机合成中间体, 对其合成及其作为中间体在有机化合物特别是杂环化合物的合成中的应用进行了综述.     

制备方法对LaFeO3纳米粉体的影响

分别采用熔盐法和溶液燃烧法合成了钙钛矿型LaFeO3纳米粉体,系统研究了两种制备方法对粉体相结构、形貌的影响,用XRD、SEM和TG/DSC对纳米粉体进行了表征.结果表明:熔盐体系、煅烧温度、燃料类型和燃料/氧化剂的摩尔比对合成LaFeO3有重要的影响.450-750℃的熔盐NaNO2体系及650-800℃的熔盐NaN...     

Synthesis of polysaccharides. Communication 16. Synthesis of L-arabinopyranans

Summary The synthesis has been effected of 3-0-acetyl-4-0-trityl- and 4-0-acetyl-3-0-trityl-1,2-0-[(l-exo-cyano)ethylidene]-p-L-arabinopyranose by the polycondensation of which (1 4)-L-arabinopyranan and (1 3)-L-arabinopyranan were obtained containing 1,2-trans- and 1,2-cis-glycosidic bonds at a ratio 31.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 196–199, January, 1986.     

Synthesis of santiagonamine

The first total synthesis of santiagonamine (1) is achieved in 12 steps from isovanillin. A palladium-catalyzed Ullmann cross-coupling reaction and a photocyclization are the key steps in the synthesis.     

虾青素的合成

以α-紫罗兰酮为起始原料, 采用2C₁₅＋C₁₀→C₄₀路线合成了虾青素. 并经过选择性环氧化三甲基硅基烯醇醚双键的关键步骤, 设计并完成了关键中间体C₁₅部分——6-羟基-3-(3-羟基-3-甲基-1,4-戊二烯)-2,4,4-三甲基-2-环己烯-1-酮的合成.     

氢醌化合物的合成

采用４种不同的路线,合成了甲氧氢醌等１１个化合物,经结构鉴定,确定为定量构效关系研究的目的化合物。     

Synthesis of polynaphthoquinone

The synthesis of polynaphthoquinone in nitric acid was found to require N(III) catalysis.     

Synthesis of ellipticine

The 6H-pyrido[4,3-b]carbazole system is efficiently synthesized by intramolecular attack of an ester enolate on an unactivated pyridinium salt.     

Synthesis of Chlorosilicates

Chlorosilicates represent important intermediates in S_N2 reactions of chlorosilanes. They can be stabilized by the introduction of electron‐withdrawing substituents. Salts of various (pentafluoroethyl)chlorosilicates have been isolated and structurally characterized.     

Synthesis of thienoimidazothiazoles

Three isomeric substituted thienoimidazothiazoles were synthesized as thiophene analogs of the immune modulator TILOMISOL, by cyclizing appropriate β-oxothioethers of thienoimidazoles. In contrast to the benzene analog no intermediates were observed at this step.