2-乙酰基-6-甲氧基萘的多相催化氢化

乙酰基溴甲基萘;甲氧基萘基;2-乙酰基-6-甲氧基萘的多相催化氢化     

2-卤乙基-2-(6＇-甲氧基-2＇-萘基)-4-甲基-1,3-二氧杂环戊烷重排合成外消旋体萘普生

卤乙基甲氧基萘基甲基二氧杂环戊烷;2-卤乙基-2-(6＇-甲氧基-2＇-萘基)-4-甲基-1;3-二氧杂环戊烷重排合成外消旋体萘普生;丙二醇;卤化铜     

2-芳基-2-吗啉醇的合成

醇胺分别与2-溴-4′-甲氧基苯乙酮、2-溴-3′-氯苯丙酮、2-溴-4′-苄氧基苯基丙酮、2-溴-4′-苄氧基苯戊酮、6-甲氧基-2-溴乙酰基萘和6-甲氧基-2-(2-溴丙酰基)萘反应,合成相应的2-芳基-2-吗啉醇(产率80.7%～97.5%)及其盐酸盐.其结构经1H NMR,IR,MS确证.     

1-[5-(α-萘)-2H-四唑-2-乙酰基]-4-芳酰基胺基硫脲和3-[5-(α-萘)-2H-四唑-2-亚甲基]-4-芳酰基-1,2,4-三唑啉-5-硫酮的合成

本文通过5-(α-萘)-2H-四唑-2-乙酰肼(Ⅰ)与芳酰基异硫氰酸酯缩合制得16种新的1-[5-(α-萘)-2H-四唑-2-乙酰基]-4-芳酰基胺基硫脲(Ⅱ),(Ⅲ)在碱性催化条件下环化为3-[5-(α-萘)-2H-四唑-2-亚甲基]-4-芳酰基-1,2,4-三唑啉-5-硫酮(Ⅲ),化合物的结构经元素分析,IR、~1H NMR和MS鉴定,对化合物(Ⅲ)的质谱裂解进行分析,解释了化合物(Ⅱ)的环化方向,经初步筛选,发现个别化合物对小麦胚芽生长有促进作用。     

2-乙酰基-6-三甲基硅基苯基三氟甲磺酸酯的合成

以2-三甲基硅基苯酚为原料,经甲酰化、酯化、亲核加成和氧化反应首次合成了3-乙酰基苯炔的前体——2-乙酰基-6-三甲基硅基苯基三氟甲磺酸酯,总收率35%,其结构经1H NMR和13C NMR确证。     

5-[5-(4-硝基苄基)-2H-四唑亚甲基]-2-芳酰氨基-1,3,4-噻二唑的合成

1-[5-(4-硝基苄基)-2H-四唑乙酰基]4-芳酰氨基硫脲(自制)在冰醋酸的存在下,经脱水、环化制备了5-[5-(4-硝基苄基)-2H-四唑亚甲基]-2-芳酰氨基-1,3,4-噻二唑。其结构经元素分析,IR,^1H NMR和MS确认。     

2,5-二甲基-3,4-二乙酰基-1-芳基吡咯的合成

多取代吡咯;二乙酰基己二酮;取代苯胺;2;5-二甲基-3;4-二乙酰基-1-芳基吡咯的合成     

1-(α-萘乙酰基)-4-芳酰基氨基硫脲及3-(α-萘亚甲基)-4-芳酰基-1,2,4-三唑琳-5-硫酮的合成

许多酰氨基硫脲类衍生物有抗病毒、抗细菌、抗肿瘤等功效,我们曾经通过5-(α-萘)-2H-四唑-2-乙酰肼与芳酰异硫氰酸酯缩合得一系列新的酰氨基硫脲和相关的杂环衍生物,观察到它们在很低的浓度下就有调节小麦芽鞘生长的功能。Kothari等用α-萘乙酰肼与芳基异硫氰酸酯缩和制得一系列1-(α-萘乙酰基)-4-芳基氨基硫脲及     

2-吲哚酮和5-甲基-2-吲哚酮的无溶剂法制备

以苯胺和氯乙酰氯为原料在NaOH存在下酰化合成N-氯乙酰基苯胺,然后N-氯乙酰基苯胺在无水AICI,催化下环化合成2-吲哚酮．对由N-氯乙酰基苯胺合成2-吲哚酮的工艺条件进行了改进．结果表明合成2-吲哚酮的最佳条件为：反应温度为220℃,反应时间为60min,加料时温度为180℃,N-氯乙酰基苯胺与氯化钠,无水AlCl3的重量比为1：1：5．5．改进后的合成2-吲哚酮收率达到88．3％,纯度99％,收率比原工艺提高了24．6％．在此基础上,还合成了5-甲基-2-吲哚酮,并得到其最佳条件为：反应温度为190℃,反应时间为30min,加料时温度为180℃,4-甲基-N-氯乙酰基苯胺与氯化钠,无水AlCl3的重量比为1：1：5．5,收率达到83．1％,纯度为99％．     

新型2，6-双（3，5-二取代吡唑基-1-羰基）吡啶的合成

报道了四种吡唑衍生物和它们四种新型的杂环酰胺衍生物的合成，它们是3，5-二甲基吡唑(1)，5-甲基-3-苯基吡唑(2)，3，5-二苯基吡唑(3)，5-甲基-3-二茂铁基吡唑(4)，2，6-双(3，5-二甲基吡唑基-1-羰基)吡啶(5)，2，6-双(5-甲基-3-苯基吡唑基-1-羰基)吡啶(6)，2，6-双(3，5-二苯基吡唑基-1-羰基)吡啶(7)和2，6-双(5-甲基-3-二茂铁基吡唑基-1-羰基)吡啶(8)．并对它们进行了元素分析，FT-IR，^1H NMR和^13C NMR等波谱分析．     

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.     

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.     

Cu0-catalysed 1,3-dipolar cycloadditions of α-amino acid derived N,N-cyclic azomethine imines to ynones

A series of 20 CuAIAC reactions between eight 4-acylamino substituted pyrazolidine-3-one-1-azomethine imines and four terminal ynones were performed using Cu⁰ as catalyst. The corresponding fluorescent cycloadducts were obtained in very high yields upon simple workup. Thus, Cu-metal turned out to be a better catalyst than Cu^I in terms of yield and ease of isolation. Availability of azomethine imines, mild reaction conditions, and simple workup enable a “click” access to libraries of densely substituted 2,3-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-ones. Reactivity of differently substituted dipoles was evaluated experimentally and by quantum chemical methods (DFT).     

Synthesis and antioxidative/anti-inflammatory activity of novel fullerene–polyamine conjugates

(E)-4-(Fullerenopyrrolidin-1-yl)-3-methylbut-2-enoic acid and its corresponding succinimidyl ester, readily obtained through Prato-type modification of C₆₀, were used for the selective N-acylation of polyamines. The thus obtained conjugates were evaluated for their antioxidative and anti-inflammatory activity and their cytotoxicity was determined. Members of this family of compounds showed interesting anti-lipid peroxidation, anti-lipoxygenase and anti-inflammatory activity and comparable cytocompatibility to spermidine.