1,3,4,6-四-O-乙酰基-β-D-氨基葡萄糖的合成

分别用对甲氧基苯甲醛和苯甲醛保护D-氨基葡萄糖的氨基，再将羟基用乙酰基保护，以氯化氢脱去氨基上的保护基团，最后脱去氯化氢得到1，3，4，6-四-0-乙酰基-β-D-氨基葡萄糖。两种方法的总产率分别为59％和61％。道关键中间体3b未见报，其结构经^1H NMR表征。     

The Direct Resolution of the Enantiomers of Four Chiral Pesticides

Cellulose-tris(3,5-dimethylphenylcarbamate)(CDMPC) were synthesized as highperformance liquid chromatography (HPLC) chiral stationary phase(CSP). The successful resolution of four chiral pesticides on the CSP was realized and the influence of the temperature on the separation was studied.     

Diaqua­bis[2′‐(4,5‐diaza­fluoren‐9‐yl­idene)picolinohydrazidato‐κ2N,O]zinc(II) tetra­hydrate: a metal–water chain complex containing cyclic water hexa­mers

In the title compound, [Zn(C₁₇H₁₀N₅O)₂(H₂O)₂]·4H₂O, cyclic water hexa­mers forming one‐dimensional metal–water chains are observed. The water clusters are trapped by the co‐operative association of coordination inter­actions and hydrogen bonds. The Zn^II ion resides on a centre of symmetry and is in an octa­hedral coordination environment comprising two O atoms and two N atoms from two 2′‐(4,5‐diaza­fluoren‐9‐yl­idene)picolinohydrazidate ligands and two water mol­ecules.     

Two Novel Antifungal Saponins from Tibetan Herbal Medicine Clematis tangutica

Antifungal assay-guided isolation of the ethanol extract of the aerial parts of Clematis tangutica yielded two novel triterpene saponins. Their structures were determined to be 3-O-α-L-arabinopyranosyl hederagenin 28-O-α-L-rhamnopyranosyl ester (1) and 3-O-β-D-glucopyranosyl-(1→4)-α-L-arabinopyranosyl hederagenin 28-O-α-L-rhamnopyranosyl ester (2) on the basis of spectral data and chemical reactions.     

聚1-氨基蒽醌在二次锂电池正极材料中的应用

采用化学方法合成聚1-氨基蒽醌并用于二次锂电池正极材料,通过红外光谱、扫描电镜、粒度测试、循环伏安以及充放电测试等方法对材料的官能团结构、微观形貌、颗粒大小以及电化学性能等进行了研究与分析.实验表明,与金属锂组成二次锂电池后,聚1-氨基蒽醌达到了218.3 mAh•g－1的首次放电容量,经过25次循环后仍可保持较高的充放电效率.由于材料具有较高的能量密度且不含对环境有污染的元素S,因此是二次锂电池非常有希望的正极材料.     

LaSrBO4型复合氧化物的合成及其CO氧化活性研究

LaSrBO4(B=Cu、Ni、 Co、 Fe、 Mn、 Cr ) was studied with respect to their preparation, characteristics and catalytic oxidation activity by means of XRD, XPS, electric conductivity and activity evaluation. Results showed that the calcination temperature has great influence on the formation of the phases of such samples, and was associated with the radius of B ion. The greater the B ion radius, the higher the calcination temperature required for the formation of the phases. It was also found that the activity and the relative content of adsorptive oxygen and lattice oxygen on the sample surf are, the activation energy of electron conduction and the CO oxidation activity may vary with different B ions, and demonstrate a dual-peak pattern with the increase in the number of 3d electrons of the B ion.     

阿利新蓝的合成

阿利新蓝 (ＡｌｃｉａｎＢｌｕｅ)是一种从植物中提取出的天然物。于 1 944年由Ｈａｄｄｏｃｋ和Ｗｏｏｄ在实验室通过多次实验后所发现。它的水溶液呈天蓝色 ,着色性好而且吸光系数很大。又因它较好的水溶性。所以可以作为高效的生物染色剂[1,2 ] ,用于粘蛋白染色、细菌染色及聚酯、纤维素等人造和天然纤维的染料[3 ] 。基于它的重大应用前景和较高的商业价值 ,探索出一条合理的工业化合成路线就非常重要了。有关阿利新蓝的应用虽然有很多 ,但始终未见合成阿利新蓝的文献报道。在设计它的有机合成时必然涉及酞菁铜 (ＰｃＣｕ)的氯甲基化反…     

A New Dimeric Phthalide from Angelica sinensis

Angelica sinensis (Oliv.) Diels (Umbelliferae), known as Danggui in Chinese, one of the most important traditional Chinese medicines, is used for tonifying blood and treating female irregular menstruation and amenorrhoea. It is also used for treatment of …     

2-取代亚肼基-1,3-二硫杂环戊烷类化合物的合成及其生物活性研究

以取代苯甲醛、取代吡啶和取代苯甲酸酯等为原料合成了 10种含硫杂环化合物 (其中 2a～ 2g化合物为国内外未见报道 ) .在合成过程中采用了超声波技术 ,极大地缩短了反应时间 ,提高了收率 .所得化合物的结构经IR ,1 HNMR ,MS和元素分析证实 .对其生物活性进行了初步测试 ,结果证明一些化合物具有良好的抑菌或杀菌作用 ,其中 2b ,2c ,2e ,2h ,2i和2j对大肠杆菌 ( 10 40 7号 )的抗菌效果与CET和SMZ相当 ;2b ,2c ,2f对草绿色链球菌 ( 112 3号 )的抗菌效果与CET和SMZ相当 .     

Investigation of Isomerization of 2—Seleno—1,3,2—diazaphospholidine Derivatives

For the first time the isomerization of 1,3,2-diazaphospholidine-2-sclenide dervatives in refluxing benzene in the presence of trace water was observed. The structures of isomerized products were determined by IR, ^1H NMR,^31P NMR, elemental analysis and X-ray crystallography. The mechanism of isomerization was also proposed.