新型硫杂杯[4]芳烃衍生物的合成

在对叔丁基硫杂杯[4]芳烃(1)的下缘1,3-位引入芳醛基制得硫杂杯[4]二醛基衍生物(3);3在水合肼中肼解制得硫杂杯[4]二醛腙基衍生物(4);4与5,5'-亚甲基二水杨酰基二水杨酰氯经缩合反应合成了具有桥连结构的硫杂杯[4]芳烃桥联氮杂衍生物(6),3,4和6为新化合物。其结构经1H NMR,IR,ESI-MS和元素分析表征。     

硫杂杯芳烃冠醚的合成及其与氨基酸配合性能的研究

在普通杯芳烃骨架中引入硫原子可以改善普通杯芳烃的配合性能。文中首先合成了硫杂杯[4]芳烃四酰肼衍生物3,在弱酸的催化下继续与化合物4反应,高产率地合成了同时含酰胺和席夫碱单元的硫杂杯[4]芳烃冠醚衍生物5,新化合物的结构经1H NMR、元素分析、ESI-MS等表征证实。同时探讨了新型硫杂杯[4]芳烃衍生物5与系列-α氨基酸的配合性能。     

一些新型含氮、硫杂官能团的杯[4]芳烃衍生物的合成

以杯[4]芳烃-1,3-二溴乙氧基衍生物1为合成平台,在K2CO3/MeCN体系中分别与乙醇胺、L-亮氨醇、2-巯基苯并咪唑、巯基乙酸乙酯反应,以49%～76%的产率合成了4种新型含氮、硫杂官能团的杯[4]芳烃衍生物2,4,5和6.化合物2进一步与异硫氰酸苯酯反应,以84%的产率得到了新型树枝状杯[4]芳烃氮、硫杂衍生物3.新化合物的结构与构象经元素分析、质谱、核磁共振谱等表征证实.     

硫杂杯[4]芳烃衍生物的合成及萃取性能研究

通过两个不同的平台合成了一系列结构新颖的硫杂杯[4]芳烃衍生物,阳离子萃取试验表明该硫杂杯[4]芳烃衍生物比含有相似官能团的杯[4]芳烃衍生物具有更好的软金属离子萃取性能,新化合物的结构经IR, 1H NMR,MS和元素分析等证实.     

系列新型硫杂杯[4]芳烃氮杂衍生物的合成

在对叔丁基硫杂杯[4]芳烃的下缘1,3位引入芳醛基, 合成了硫杂杯[4]二醛基衍生物2. 化合物2与苯胺、水杨酰肼、烟酰肼、异烟酰肼等通过席夫碱缩合反应得到新型硫杂杯[4]氮杂衍生物3a～3d, 产率分别为83%, 80%, 77%和79%. 化合物2与邻苯二胺、乙二酰肼、丙二酰肼、己二酰肼等通过“1＋1”分子间缩合得到新型1,3-桥联硫杂杯[4]氮杂衍生物4a～4d, 产率53%, 51%, 59%和66%. 新化合物的结构经IR, ¹H NMR, MS和元素分析等证实.     

硫杂杯[4]芳烃酰胺型氮杂冠醚的合成

硫杂杯[4]芳烃与N,N'-亚乙基双(2-氯乙酰胺)发生分子内"1+1"缩合反应,合成了新型硫杂杯[4]芳烃酰胺型氮杂冠醚--25,27-二羟基-26,28-(1',10'-二氧杂-4',7'-二氮杂-3',8'-二氧代亚癸基)-硫杯[4]芳烃(叔丁基硫杯[4]-1,3-酰胺冠醚)(3),产率68%.1H NMR,ESI-MS和元素分析确证3为1,3-桥联模式且为杯式构象.     

硫杂杯[4]芳烃酰胺基硫脲衍生物的合成

硫杂杯[4]芳烃四乙酸乙酯衍生物与水合肼反应生成硫杂杯[4]芳烃四酰肼衍生物(3),3与异硫氰酸苯酯反应得到新型硫杂杯[4]芳烃酰胺基硫脲衍生物,总产率61%。     

(硫杂)杯[4]芳烃缩氨基(硫)脲(桥联)衍生物的合成

对叔丁基(硫杂)杯[4]芳烃-1,3-二醛基衍生物4a和4b与苯基氨基硫脲进行“1＋2”缩合反应, 合成了杯[4]芳烃缩氨基硫脲衍生物5a和5b, 产率为84%和85%. 化合物4a和4b与1,6-己基双氨基脲发生“1＋1”缩合反应, 合成了杯[4]芳烃双缩氨基脲桥联衍生物6a和6b, 产率为83%和80%. 新化合物的结构与构象经元素分析、质谱、核磁共振谱等表征证实.     

新型水溶性杯[4]-1,3-氮杂冠醚衍生物的合成及其催化性能

杯[4]芳烃与N,N′-亚乙基双(2-氯乙酰胺)反应得杯[4]-1,3-氮杂冠醚衍生物(2);2经浓硫酸磺化合成了新型水溶性杯[4]-1,3-氮杂冠醚衍生物(3),其结构经1H NMR,ESI-MS和元素分析表征。探讨了3作为反相转移催化剂对氯化苄和硫氰酸钾的亲核取代反应的催化性能,结果表明,3具有一定的催化活性。     

选择性合成三取代乙氧羰基甲氧基硫杂杯[4]芳烃

对叔丁基硫杂杯[4]芳烃与氯乙酸乙酯在K2CO3/丙酮体系中反应,选择性地合成了三取代乙氧羰基甲氧基硫杂杯[4]芳烃,产率78%,其结构经1H NMR,MS和元素分析表征.     

含噻二唑官能基的对叔丁基硫桥杯[4]芳烃衍生物的合成及结构

以对叔丁基硫桥杯[4]芳烃(1)为原料, 在碳酸钾存在下与碘甲烷反应, 生成1,3-二取代桥杯[4]芳烃(2), 其分别与1,2-二溴乙烷, 1,3-二溴丙烷在碳酸钾的存在下进行烷基化反应, 生成硫桥杯[4]芳烃衍生物3和4. 在氢氧化钠存在下,其与过量的含不同官能团的2-巯基-1,3,4-噻二唑反应, 生成下缘含1,3,4-噻二唑基的硫桥杯[4]芳烃衍生物5a, 5b, 6a和6b, 并通过了¹H NMR, ¹³C NMR, IR, MS和元素分析的确证. 同时, X射线分析确定了硫桥杯[4]芳烃3和5a的晶体结构.     

含苯并噁唑基的硫桥杯[4]芳烃衍生物的合成及结构

在碳酸钾存在下, 对叔丁基硫桥杯[4]芳烃(1)分别与端基二溴代烷和碘甲烷反应, 生成硫桥杯[4]芳烃衍生物2～4. 含端基溴代的硫桥杯[4]芳烃衍生物2和4分别与2-巯基苯并噁唑在碳酸钾存在下反应, 生成硫桥杯[4]芳烃衍生物5a～5d. 通过1H NMR, 13C NMR, IR, MS和元素分析等手段对产物进行了表征. 同时, X射线分析确定了硫桥杯[4]芳烃5b的晶体结构.     

Mn4-硫杂杯[4]芳烃单元的溶剂导向超分子组装

以去叔丁基硫杂杯[4]芳烃与Mn(II)为研究对象,通过改变体系溶剂分别得到了两个四核化合物Mn4(T4A)2 (1)和Mn4(T4A)2(DMF)2(2) (T4A = thiacalix[4]arene)。当反应溶剂为氯仿(CHCl3)和甲醇的混合溶剂时,形成的是以四核锰为结构单元的二维“笼目”(Kagomé)状超分子化合物1,而当反应溶剂为N,N-二甲基甲酰胺(DMF)和甲醇的混合溶剂时,得到的是格子状二维超分子互穿的三维结构化合物2。化合物1具有很大的溶剂占有空隙,是一个潜在的多孔材料,而化合物2是一个紧密堆积的拓展结构。     

Thiacalix[4]arene derivatives as radium ionophores: a study on the requirements for Ra2+ extraction

The synthesis and NOE-based structural characterization is described of thiacalix[4]arene tricarboxylic acid (7), thiacalix[4]crown-5 and -6 monocarboxylic acids (2 and 5), and the bis(N-methylsulfonyl)thiacalix[4]crowns-5 and -6 (4a,b). The 226Ra2+ selectivity coefficients, log(K(Ra)ex/K(M)ex), of the new thiacalix[4]arene derivatives are compared directly with those of thiacalix[4]crown-5 and -6 (1a,b), thiacalix[4]crown-5 and -6 dicarboxylic acids (3a,b), and thiacalix[4]arene di- and tetracarboxylic acids (6 and 8). Thiacalix[4]arene dicarboxylic acid (6) already exhibits a high 226Ra2+ selectivity, but this is significantly improved in the case of 3b, having an additional crown-(6-)ether bridge. The covalent combination of a crown ether and carboxylic acid substituents as in the thiacalix[4]arenes 2,3a,b,4a,b, and 5 gives a better 226Ra2+ selectivity in the presence of Sr2+ or Ba2+ than mixtures of dibenzo-21-crown-7 and thiacalix[4]arene dicarboxylic acid (6) or of pentadecanoic acid and thiacalix[4]crown-6 (1b).     

A Rare and Exclusive Endoperoxide Photoproduct Derived from a Thiacalix[4]arene Crown‐Shaped Derivative Bearing a 9,10‐Substituted Anthracene Moiety

A rare and exclusive endoperoxide photoproduct was quantitatively obtained from a thiacalix[4]arene crown‐shaped derivative upon irradiation at λ=365 nm; the structure was unambiguously confirmed by ¹H/¹³C NMR spectroscopy and X‐ray crystallography. The prerequisites for the formation of the endoperoxide photoproduct have also been discussed. Furthermore, the photochemical reaction rate could be greatly enhanced in the presence of the thiacalix[4]arene platform because it served as a host to capture oxygen.     

Synthesis and properties of mono-O-[(N-(aminoalkyl)aminocarbonyl)-methoxy]thiacalix[4]arenes and novel mono-O-bridged bisthiacalix[4]arene

A simple method for thiacalix[4]arene O-monoamide preparation with high yields using 5,11,17,23-tetra-tert-butyl-28-(ethoxycarbonyl)methoxy-2,8,14,20-tetrathiacalix[4]arene reaction with diaminoalkanes is reported. The solid state cyclization reaction of the acylethylenediamines function of 5,11,17,23-tetra-tert-butyl-28-O-[(N-(2-aminoethyl)aminocarbonyl)-methoxy]thiacalix[4]arene leading to the formation of the 5,11,17,23-tetra-tert-butyl-28-[2-methoxy-imdazoline]thiacalix[4]arene compound is described for the first time for the calixarene macrocycle family. Finally, preliminary results show that O-mono-amide-thiacalixarene derivatives are promising candidates for the production of self-assembled materials and efficient precursors for the synthesis of bisthiacalix[4] arenes.     

Synthesis and conformational evaluation of p-tert-butylthiacalix[4]arene-crowns

Bridging of p-tert-butylthiacalix[4]arene afforded 1,3-dihydroxythiacalix[4]arene-monocrown-5 (3b), 1,2-alternate thiacalix[4]arene-biscrown-4 and -5 (4a,b), and 1,3-alternate thiacalix[4]arene-biscrown-5 and -6 (5a,b), depending on the metal carbonates and oligoethylene glycol ditosylates used. Starting from 1,3-dialkylated thiacalix[4]arenes, the corresponding bridging reaction gave 1,3-alternate, partial-cone, and cone conformers 10-19, depending on the substituents present. Temperature-dependent studies revealed that the conformationally flexible 1,3-dimethoxythiacalix[4]arene-crowns 10a-c exclusively occupy the 1,3-alternate conformation. Demethylation exclusively gave the cone 1,3-dihydroxythiacalix[4]arene-crowns (3a,c), which could not be obtained by direct bridging of thiacalix[4]arene. The different structures were assigned on the basis of several X-ray crystal structures and extensive 2-D (1)H NMR studies.     

Anion receptors based on ureido-substituted thiacalix[4]arenes and calix[4]arenes

The regioselective nitration of 25,27-dipropoxythiacalix[4]arene was carried out as a key step in the synthesis of thiacalix[4]arene derivative bearing two arylureido functions on the upper rim. The preorganisation of ureido units using the thiacalix[4]arene/calix[4]arene moieties as a molecular scaffold gave novel anion receptors. These compounds, albeit based on hydrogen bonding interactions, show good complexation ability even in highly HB-competitive solvent, such as DMSO. Direct comparison of otherwise identical structures 6a and 7a revealed remarkable dominance of the thiacalix[4]arene derivative over its classical analogue in anion binding.     

单取代罗丹明-硫杂杯[4]芳烃衍生物的合成及对Fe~(3+)离子的荧光探针性质研究

以1,3-交替-二羧基甲氧基硫杂杯[4]芳烃为原料,通过与罗丹明乙二胺衍生物的酰化反应得到罗丹明基团单取代的硫杂杯[4]芳烃衍生物。目标化合物结构经IR,NMR,MS及元素分析等技术表征。荧光及可见吸收光谱法研究表明化合物对Fe3+具有探针性质,在乙醇-水(1/1,V/V)Tris-HCl(pH=6.0)缓冲溶液中,对Fe3+呈现光关-开响应,并观察到显著的荧光增强和颜色变红现象。测定了Fe3+-配合物的组成、稳定常数及荧光量子产率。