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1.
溴化铜对6-甲氧基-2-酰基萘的选择性溴化反应   总被引:3,自引:0,他引:3  
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  相似文献   

2.
胡艾希  陈平  袁帅  周勇 《合成化学》2002,10(4):333-334
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%)。  相似文献   

3.
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  相似文献   

4.
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%。  相似文献   

5.
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  相似文献   

6.
2—甲氧基—6—丙酰基萘的合成   总被引:9,自引:0,他引:9  
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-  相似文献   

7.
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  相似文献   

8.
2-芳基-2-吗啉醇的合成   总被引:5,自引:0,他引:5  
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.  相似文献   

9.
4-(6-甲氧基-2-萘基)-2-(2-羟苄亚氨基)噻唑合成与表征   总被引:1,自引:0,他引:1  
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.  相似文献   

10.
多环芳烃化合物广泛存在于汽车尾气、煤焦油和香烟中,具有致癌作用,国内外对多环芳烃的检测方法研究十分活跃,卤代芳烃则是重要的测试项目之一。文献[1,2]分别报道了环糊精诱导室温磷光法测定β-溴代萘、α-溴代萘,文献[3]报道了室温磷光法测定6-溴萘硫酸钾。本法在十二烷基硫酸钠(SDS)胶束体系中用荧光法测定6-溴萘硫酸钾,与文献方法比较,本法简便、快速,具有一定实用价值。1试验部分1.1仪器与试剂日立F-4500型荧光光度计;pHS-3型酸度计。6-溴萘硫酸钾(BNS)标准溶液:1.0×10-3mol·L-1;十二烷基硫酸钠(SDS)溶液:0.1 mol·L-1;缓冲溶…  相似文献   

11.
In the context of the preparation of camptothecin and luotonin A analogs, the synthesis of some key keto-precursors and their use in Friedländer condensation are described. This paper also focuses on the stability of these keto intermediates and emphasizes the major differences between indolizinones and pyrroloquinazolinones series. Noteworthy is also the report of some original structures isolated as by-products of some experiments.  相似文献   

12.
KMnO4-mediated oxidative CN bond cleavage of tertiary amines producing secondary amine was introduced, which was trapped by electrophiles (acyl chloride and sulfonyl chloride) to form amides and sulfonamides. The reaction could take place at mild condition, tolerating a wide range of function groups and affording products in moderate to excellent yields.  相似文献   

13.
The review contains a concise historical account and information on the most significant researches undertaken by the staff at the A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences on the Chemistry of Heterocyclic Compounds. Dedicated to Academician of the Russian Academy of Sciences B. A. Trofimov on his 70th jubilee. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1443–1502, October, 2008.  相似文献   

14.
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.  相似文献   

15.
Different approaches for the synthesis of 1-benzyloxypyrazin-2(1H)-one derivatives from simple amino acids have been investigated. A library of 33 precursors for the preparation of N-hydroxy pyrazinones was obtained in moderate to good yields.  相似文献   

16.
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.  相似文献   

17.
The highly regioselective Buchwald–Hartwig amination at C-2 of the cheap and readily accessible reagent, 2,4-dichloropyridine with a range of anilines and heterocyclic amines is described. This new methodology is robust and provides a facile access to 4-chloro-N-phenylpyridin-2-amines on 0.25 mol scale. These intermediates undergo a further Buchwald–Hartwig amination at higher temperature to enable rapid exploration of the chemical space at C-4 and to provide a library of 2,4-bisaminopyridines.  相似文献   

18.
19.
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%).  相似文献   

20.
An efficient approach to the synthesis of highly congested di, penta and hexacyclic pyrazoles as well as imidazole fragment containing novel heterocyclic molecule has been developed through a carbanion induced transformation of suitably functionalized 2H-pyran-2-ones, benzo[h]chromene and thiochromeno[4,3-b]pyrans. Due to the presence of fluorescence, we report their prime application metal sensor as off/on switching in ferric ions.  相似文献   

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