3-氨基环己基甲酸和cis-3-氨基环己烯基-5-甲酸立体异构体的合成

通过手性胺拆分方法，从3-环己烯基甲酸出发分别合成得到了3-氨基环己基甲酸（ACHC）的四个立体异构体，以及cis-5-氨基-3-环己烯基甲酸（ACHEC）的二个立体异构体。     

3,5-diBr-DMPAP直接光度法测定葡萄糖酸锌含量

为建立一种快速、简便、灵敏测定葡萄糖酸锌含量的方法,在非离子型表面活性剂聚氧乙烯异辛基苯基醚(TritonX-100)存在下,用2-(3,5-二溴-2-吡啶偶氮)-5-二甲氨基酚(3,5-diBr-DM-PAP)作显色剂,直接光度法测定了葡萄糖酸锌。结果表明,该法显色络合物最大吸收波长为560 nm,线性范围为0~1.5μg.mL-1,表观摩尔吸光系数为1.10×105L.mol-1.cm-1,回收率为98.7%~102.2%,具有操作快速、简便,结果灵敏可靠等优点,应用该法直接测定补锌口服液葡萄糖酸锌含量,结果满意。     

（Z）—3—丁烯基—4,5—二羟基苯酞的合成

（Ｚ）－３－丁烯基苯酞和它的衍生物广泛地存在于微形科植物，如当归、川芎等，这些植物有些是重要的中药材。（Ｚ）－３－丁烯基－４，５－二羟基苯酞是（Ｚ）－３－丁烯基苯酞的类似物；它对前列腺素Ｆ２α具有抑制作用。本文以３，４－二甲氧基苯甲醇（２）或价廉易得的胡椒醇（６）为起始原料，分别经四步反应顺利地合成了（Ｚ）－３－丁烯基－４，５羟基苯酞（１）。和一步是本方法的关键，即利用杂原子诱导的区域选择性的芳环     

Synthesis and kinetic evaluation of 4-deoxy-4-phosphonomethyl-d-erythronate, the first hydrolytically stable and potent competitive inhibitor of ribose-5-phosphate isomerase

4-deoxy-4-Phosphonomethyl-d-erythronate, an isosteric and hydrolytically stable analogue of the known ribose-5-phosphate isomerase inhibitor 4-deoxy-4-phospho-d-erythronate, was obtained by a 14-step synthesis from d-arabinose through an highly improved synthesis of the precursor 5-deoxy-5-phosphonomethyl-d-arabinose. The title compound appears as the first stable and potent competitive inhibitor of the enzyme catalyzed isomerization of ribose-5-phosphate to d-ribulose-5-phosphate (K_i=74 μM, K_m/K_i=100), exhibiting only a 3-fold weaker inhibitory activity than its phosphate analogue.     

甲烷在Mo/HZSM-5催化剂上的脱氢聚合反应

对不同Mo含量的Mo／HZSM－5催化剂的结构进行了表征，并对这些催化剂的甲烷非氧气氛下的转化反应进行了考察．催化剂的BET比表面积及酸性随Mo含量的增加而降低，当Mo含量大于5％时，Mo对ZSM－5分子筛的晶型有影响，并出现MoO3物相．甲烷在700℃时可高选择性地生成苯和乙烯，最佳Mo含量大约为2％．纯的MoO3或HZSM－5上该反应几乎不进行，因此，可能是分散的钼氧离子和分子筛的酸中心是甲烷转化的活性中心，只有二者的协同作用才能促进甲烷的转化．反应后催化剂中的钼物种被还原了．催化剂上的积炭可能是催化剂失活的主要原因之一，烧炭后催化剂活性基本恢复．     

Crystal and Molecular Structure of the Nitramino Derivatives of Tetrazole and 1,2,4-Triazole. III. 5-Nitraminotetrazole Lithium Salt Monohydrate

The structure of 5-nitraminotetrazole lithium salt monohydrate was determined by X-ray diffraction analysis. Crystals are monoclinic, space group P2₁/c; a = 8.3789(5), b = 10.1872(6), c = 6.6709(5) ; = 106.63(1)°; V = 545.60(98) ³; Z = 4; _calc = 1.875 g/cm³. The anion has a planar nitrimine structure with a delocalized negative charge. Each lithium cation (c.n. 5) is bound to three anions and two hydration water molecules. Both oxygen atoms of the nitro groups and the N(3) atom of the tetrazole ring are involved in cation coordination. The geometrical characteristics of the anion are similar to those found for other monosalts of 5-nitraminotetrazole.     

A novel and efficient approach to highly substituted indolizines via 5-endo-trig iodocyclization

A new approach to indolizines has been developed using a 5-endo-trig iodocyclization of allylic esters followed by isomerization and dehydroiodination facilitated by triethylamine at rt. This mild procedure enabled us to synthesize a number of highly substituted indolizines in good yields.     

镓改性ZSM-5沸石中镓活性中心的形成与表征

采用脉冲微反体系研究了经不同程度还原和不同镓含量的GaZSM-5沸石的芳构化性能与吡啶吸附红外光谱特征谱带吸收度的关联，证实了1458 cm~(-1)吸收带的用于表征与Ga物种有关的活性中心，并研究了沸石的硅铝比对Ga中心形成和Ga的价态对芳构化性能的影响。结果表明，对Ga含量相同的样品来说，硅铝比愈低，起始Ga中心生成量愈多，高价态与低价态的Ga中心对丙烷芳构化反应都有促进作用。     

Molecular and crystal structures of 5,7-dichloro-4-nitro-2,1,3-benzoxadiazole and products of its reactions with secondary amines

The molecular and crystal structures of 5,7-dichloro-4-nitro-2,1,3-benzoxadiazole and products of its reactions with hexamethyleneimine and dimethylamine were established by X-ray diffraction analysis. The molecular structures and the systems of hydrogen bonds in the crystals of these compounds are discussed.     

PEO-LiClO_4-ZSM5 composite polymer electrolyte (IV): Polarized optical microscopy study

All solid-state lithium polymer batteries may be one of the best choices for the future electrochemical power source, characterized by high energy densities, good cyclability, reliability and safety[1,2]. Owing to its potential capability to replace the t…