共查询到20条相似文献,搜索用时 15 毫秒
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TongKuanXU XingHaiSHEN HongChengGAO 《中国化学快报》2004,15(1):26-28
Two substituted 3H-indole quaternary ammonium molecules were designed andsynthesized using hexamethylphosphoramide (HMPA) as a solvent. The products were purified and characterized by IR, ^1H NMR, MS and elemental analysis. 相似文献
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3—氮杂环取代色酮的合成 总被引:1,自引:0,他引:1
报道了通过1-苯基-3-甲酰基-1,2,5-三唑合成3-杂环取代色酮的结果。化合物的结构经元素分析,紫外光谱,红外光谱,1HNMR及13CNMR谱证实。 相似文献
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Yu LIU* Shi Zhao KANG Chun Hua DIAO Department of Chemistry Nankai University Tianjin 《中国化学快报》2001,(10)
A number of cyclodextrin (CD) derivatives and crown ethers have been designed and synthesized in order to examine their molecular/ions recognition mechanics and control molecular assembly and self-assembly. However, CD derivatives linked by crown ether have rarely been synthesized and their molecular assembly has not been extensively investigated1. In the present communication, we report the synthesis of 4', 5'-dimercap -tomethylene-benzo-15-crown-5 tethered b-cyclodextrin and its self-asse… 相似文献
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Xiao Qi ZHENG Yong Hui WANG Qing Xiang GUO* Li YANG You Cheng LIU Department of Chemistry University of Science Technology of China Hefei National Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 《中国化学快报》2003,(8)
As artificial enzymes, the binding constants of cyclodextrins (CDs) and their substrates are expected to be high1. For this purpose, many kinds of bridged cyclodextrin dimers2 whose two cyclodextrins are linked by various spacers have been constructed. It was of interest to make the dimers, whose binding constants would exceed 108dm3/mol3. Up to date, the bridged cyclodextrin dimers have been extensively studied as enzyme models and as molecular receptors4-6. Recently, we synthesized a brid… 相似文献
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取代苯亚胺基噻唑啉的合成和抑菌活性 总被引:3,自引:0,他引:3
2-取代苯亚胺基噻唑啉化合物 ( )中的双键可以在环上或在环外 ,在一定条件下 ,两种异构体可以相互转换 .Ar为单取代或多取代的芳基 .先导化合物 唑烷酮是一种海藻类的毒素[1 ] ,能衍生出一些具有生物活性的化合物 .我们曾对此类化合物的植物激素活性和除草活性进行过研究 [2 ] ,也有文献对其动物麻醉效能进行了报道 [3] .本文采用改进的合成方法制备了 2 -取代苯亚胺基噻唑啉化合物 ,并进行了生物测定 ,发现其具有很好的抑菌活性 ,有的化合物未见文献报道 .标题化合物按下列途径合成 :NH2 CH2 CH2 OH H2 SO4 H2 NCH2 CH2 OSO3H C… 相似文献
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为优化抗倒胺结构。合成了30种化合物,用IR,1HNMR及元素分析确定了结构,并进行了水稻发芽试验及田间试验。 相似文献
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Phenyl sulfone-containing 2,3-diarylindole derivatives were designed and indentified to be selective COX-2 inhibitors. A convenient synthetic route was also developed for the synthesis of the novel inhibitors. 相似文献
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Summary. Inclusion complexes of β-cyclodextrin with two steroid derivatives, progesterone (pregn-4-ene-3,20-dione) and hydrocortisone
(11,17,21-trihydroxy-pregn-4-ene-3,20-dione), were studied in the liquid state by NMR spectroscopy. The complex formation
process was monitored by intermolecular dipolar interactions between 1H signals in the hydrophobic β-cyclodextrin cavity (H-3 and H-5 of the α-glucose units) and the steroid moiety in ROESY spectra.
The data revealed that progesterone is fully immersed in the β-cyclodextrin cavity; however, complete inclusion of the hydrocortisone
molecule was prevented by the polar hydroxyl groups on its surface.
Received April 26, 2001. Accepted (revised) May 18, 2001 相似文献
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Solid-phase methodology has been rapidly and extensively applied to the preparation of small organic molecules recently1. It might be argued that selenoxide syn-elimination provided the principal impetus for the development of organoselenium chemistry. In addition, the required selenoxides are readily available from the oxidation of the corresponding selenides, which in turn can be prepared by the reaction of selenium-stabilized carbanions with various electrophilic substrates2. However, or… 相似文献
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