溴化铜对6-甲氧基-2-酰基萘的选择性溴化反应

甲氧基酰基萘;甲氧基溴酰基萘;溴化铜对6-甲氧基-2-酰基萘的选择性溴化反应     

6-甲氧基-2-丙酰基萘在醇溶剂中的溴化反应

室温下，6－甲氧基－2－丙酰基萘和1，3－二溴－5，5－二甲基海因的溴化反应在醇溶剂中，反应速度快、转化率高，生成5－溴－6－甲氧基－2－丙酰基萘的收率高（98．59％）。     

氯化铜对6-甲氧基-2-酰基萘选择性氯化反应

甲氧基酰基萘;甲氧基萘;氯化铜对6-甲氧基-2-酰基萘选择性氯化反应     

(2S)-(+)-2-溴-1-(6'-甲氧基-2'-萘基)丙-1-酮的不对称合成

以(2R,3R)-酒石酸二甲酯为手性辅助剂,6-甲氧基-2-丙酰基萘经缩酮化、溴化铜不对称溴化、水解等反应合成了(2S)-2-溴-1-(6'-甲氧基-2'-萘基)丙-1-酮。总收率94%。     

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     

氯化铜对芳基烷基酮的选择性氯化反应

氯化铜对芳基烷基酮的选择性氯化反应;氯代苯丙酮;甲氧基丙酰基萘;甲氧基乙酰基萘;甲氧基苯乙酮     

2—甲氧基—6—丙酰基萘的合成

2-甲氧基-6-丙酰基萘1,是(s)-(+)-2-(6-甲氧基-2-萘基)丙酸(萘普生,一种非甾体消炎镇痛药)的大多数新合成路线的关键中间体。2-甲氧基-6-丙酰基萘是通过2-甲氧基萘的Friedel-Crafts酰基化反应制得。由β-     

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

以溴化铜或氯化铜为卤化剂 ,6-甲氧基 -2 -丙酰基萘经羰基 α-卤化、1 ,2 -丙二醇缩酮化、醋酸锌或氧化锌催化重排和水解等反应合成外消旋体萘普生 ,总收率为 85 %～ 90 .4% (以 6-甲氧基 -2 -丙酰基萘计 ) .“一锅法”重排合成外消旋体萘普生 ,不需分离中间体 ,操作简便、收率高 .以氯化铜为卤化剂、氧化锌为催化剂的重排合成工艺较佳     

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.     

4-(6-甲氧基-2-萘基)-2-(2-羟苄亚氨基)噻唑合成与表征

6-甲氧基-2-(2-溴酰基)萘与硫脲反应环合得4-(6-甲氧基-2-萘基)-2-氨基噻唑;后者与水杨醛反应制备了新化合物4-(6-甲氧基-2-萘基)-2-(2-羟苄亚氨基)噻唑,收率为72.1%～94.8%.目标物采用核磁共振、红外光谱和元素分析测试技术进行了表征;分析目标物和中间体中萘环质子偶合分裂情况.并且确定了萘环上各质子的归属.     

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.