共查询到20条相似文献,搜索用时 31 毫秒
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N. Kent Dalley Steven B. Larson Judith S. Smith K. Lee Matheson Reed M. Izatt James J. Christensen 《Journal of heterocyclic chemistry》1981,18(3):463-467
The structures of four macrocyclic polyether sulfides have been determined by single crystal x-ray diffraction methods. The compounds studied were 1,4,7-trithia-12-crown-4, 1,4-dithia-15-crown-5, 1,4-dithia-18-crown-6 and 1,10-dithia-18-crown-6. In all four compounds the potential donor sulfur atoms point out of the ring. This causes the rings to be irregularly shaped. 相似文献
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Vladimir I. Nedel'Kin 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1):409-410
Synthesis, X-ray structure, ring-opening polymerization macrocyclic phenylene sulfides and their role in chemistry and technology of polyarylene sulfides are discussed. 相似文献
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大环化合物色谱固定相分离机理研究的新进展 总被引:1,自引:0,他引:1
简要介绍了近年来被用于大环化合物色谱固定相保留机理研究的一些新的方法和理论,重点对几种典型大环超分子主体化合物作为色谱固定相对其分离机理研究的近况进行了综述。 相似文献
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α-Halogeno ethers, sulfides, and amines are reactive compounds which can be used for the formation of new C? C bonds, either as nucleophilic or as electrophilic reagents, or by α-elimination. The use of these compounds in the synthesis of many classes of organic compounds is reviewed. 相似文献
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Omid Soltanabadi Maliheh Sadat Atri Mohammad Bagheri 《Journal of inclusion phenomena and macrocyclic chemistry》2018,90(3-4):189-257
Azobenzene derivatives due to their photo- and electroactive properties are an important group of compounds finding applications in diverse fields. Due to the possibility of controlling the trans–cis isomerization, azo-bearing structures are ideal building blocks for development of e.g. nanomaterials, smart polymers, molecular containers, photoswitches, and sensors. Important role play also macrocyclic compounds well known for their interesting binding properties. In this article selected macrocyclic compounds bearing azo group(s) are comprehensively described. Here, the relationship between compounds’ structure and their properties (as e.g. ability to guest complexation, supramolecular structure formation, switching and motion) is reviewed. 相似文献
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V. A. Sergeev V. I. Nedel'kin A. V. Astankov A. V. Nikiforov E. M. Alov Yu. A. Moskvichev 《Russian Chemical Bulletin》1990,39(4):763-766
A method has been developed for the directed synthesis of macrocyclic phenylene sulfides with 4–8 phenylene sulfide fragments, by condensation of dihaloaromatic compounds of various types with sodium sulfide or dithiophenate. A combination of this method with high dilution techniques has afforded pure macrocycles in high yields, and the macrocycle with six phenylene sulfide fragments in yields as high as 73%.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 854–858, April, 1990. 相似文献
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Francisco Palacios Author Vitae Concepción Alonso Author VitaeAuthor Vitae Gloria Rubiales Author VitaeAuthor Vitae 《Tetrahedron》2007,63(3):523-575
Recent advances in the aza-Wittig reaction of phosphazene derivatives with several carbonyl compounds are reviewed. Phosphazenes afford inter- and intramolecular aza-Wittig reactions with different compounds such as aldehydes, ketones, esters, thioesters, amides, anhydrides and sulfimides. One of the most important applications of this reaction is the synthesis of a wide range of acyclic and heterocyclic compounds, ranging from simple monocyclic compounds to complex polycyclic and macrocyclic systems. 相似文献
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Krystyna Zygo Wanda Wieczorek K. Michał Pietrusiewicz 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1)
Abstract Macrocyclic systems containing phosphine. phosphoryl or thiophosphoryl functions in the ring demonstrate high ability to complex metal ions Complexed structures of this type show interesting Fatalytic properties and can be used in homogenous and heterogenous catalysis[1,2] Macrocyclic compounds containg phosphorus are also useful as complexing agents for ammonlum salts. anions. etc [3,4] Generally three types of reactions are used to synthesize phosphorus containing macrocyclic compounds the cyclocondensation, the ring opening reaction and the reaction with metal as a matrix[5]. We have devoloped a new procedure for the synthesis of the title systems of different sizes and of different P and S contents It is based on a double conjugate addition of dithiolates to divlnyl phosphine oxides and sulfides and makes use of the so-called “cesium effect”. 相似文献
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Na Li Roger G. Harrison John D. Lamb 《Journal of inclusion phenomena and macrocyclic chemistry》2014,78(1-4):39-60
The applications of resorcinarene derivatives in modern separation techniques including high performance liquid chromatography (HPLC), gas chromatography (GC), capillary electrophoresis (CE), ion chromatrography (IC), and liquid membranes are reviewed in this paper. Resorcinarenes are macrocyclic compounds which can be modified with various substituents on upper and lower rims to provide specific functionality and selectivity. The derivatives can be adsorbed or covalently bound to the stationary phase of HPLC, GC, and IC, or used as pseudo-stationary phase in CE to separate organic or inorganic species. They have been tested as carriers to selectively transfer species from source phase to receiving phase in bulk liquid membranes, supported liquid membranes, and polymer inclusion membranes. These broad applications of resorcinarene-based macrocyclic ligands indicate that they are a promising class of compounds that are worthwhile to be explored in both synthesis and separation applications. 相似文献
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The possibility to modulate molecules reversibly by light has been fascinating chemists early on. One of the most powerful photochromic classes of compounds are azobenzenes, which have been incorporated in multiple molecular systems to alter their functionality. Recently, the incorporation of azobenzenes into macrocyclic scaffolds, azobenzenophanes, revealed a novel aspect of this interesting photoswitch. Especially, the build-in of more than one azobenzene moiety into the structure creates photochromic compounds with multiple accessible states. The cyclic arrangement also leads to a change in the photochemical properties, which offer new opportunities for functional molecular devices. In this article the synthesis as well as the photochemistry including applications of macrocyclic azobenzenes, containing more than one azobenzene unit, oligoazobenzenophanes, are reviewed. 相似文献
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药物研发的过程中,越来越多的化合物存在溶解性低的问题,因此提高药物溶解度是目前迫切需要解决的问题.环糊精、杯芳烃、葫芦脲等大环化合物可以通过主客体作用形成包合物从而增加难溶性药物的水溶性.本文介绍了几种大环化合物在药物增溶领域的应用.首先,基于大环化合物化学结构和空腔属性的差异,列举了它们可增溶药物的种类和范围;其次,... 相似文献
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Dieter Whrle 《Macromolecular rapid communications》2001,22(2):68-97
Phthalocyanines (Pc) and related macrocycles in combination with organic or inorganic macromolecules are reviewed. From the structural point of view, the macrocyclic compounds in macromolecular phases are subdivided into five types. Syntheses are described in detail, and characteristic experimental procedures are given. The properties of the materials are discussed: conductivity and photoconductivity, electrical charge/discharge, electrocatalytic reductions, photocatalytic reductions/oxidations of and at thin film electrodes, catalytic and photocatalytic oxidations, photoinduced electron transfer. 相似文献
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Shuai Zhang Yongjin Wang Prof. Hanchu Huang Prof. Derong Cao 《Angewandte Chemie (International ed. in English)》2023,62(37):e202308524
The ability to extend the polymerizations of thiyl radical propagation to be regulated by existing controlled methods would be highly desirable, yet remained very challenging to achieve because the thiyl radicals still cannot be reversibly controlled by these methods. In this article, we reported a novel strategy that could enable the radical ring-opening polymerization of macrocyclic allylic sulfides, wherein propagating specie is thiyl radical, to be controlled by reversible addition–fragmentation chain transfer (RAFT) agents. The key to the success of this strategy is the propagating thiyl radical can undergo desulfurization with isocyanide and generate a stabilized alkyl radical for reversible control. Systematic optimization of the reaction conditions allowed good control over the polymerization, leading to the formation of polymers with well-defined architectures, exemplified by the radical block copolymerization of macrocyclic allylic sulfides and vinyl monomers and the incorporation of sequence-defined segments into the polymer backbone. This work represents a significant step toward directly enabling the polymerizations of heteroatom-centered radical propagation to be regulated by existing reversible-deactivation radical polymerization techniques. 相似文献