基于高亮度高纯度LED旋光色散仪的研制

使用高亮度高纯度LED为光源,成功地研制出旋光色散仪,并通过对手性物质灰黄霉素溶液及氯酸纳晶体在不同波长下的旋光角的多次测量、比较,显示该旋光色散仪具有较高的精度,较好的重复性和方便性。     

手性Schiff碱——铜配合物的合成研究

利用合成的脱氢松香酸降解胺和工业生产的松香胺和水杨醛反应,制得手性Ｓｃｈｉｆｆ碱,再与醋酸铜反应,合成得两种新型的手性Ｓｃｈｉｆｆ碱－铜配合物,并对其进行了元素分析,红外光谱、紫外光谱表征。     

环糊精及其衍生物在高效毛细管电泳手性拆分中的应用

高效毛细管电泳 ( HPCE)在手性拆分中的应用近年受到普遍关注。含有手性添加剂环糊精 ( CD)及其衍生物的毛细管区带电泳 ( CZE)和胶束电动毛细管色谱 ( MECC)拆分体系方面研究非常活跃。综述了 CD- CZE和 CD-MECC体系 ,探讨了各体系的拆分机理和各实验条件对拆分结果的影响。     

手性表面活性剂在手性合成、识别及拆分中的应用

当今社会对单一对映体的需求越来越大,由于手性表面活性剂具有区域选择性、手性催化能力及手性识别能力,因而在手性合成、手性识别及手性拆分中的应用也越来越受封重视。文章综述了近年来手性表面活性剂在不对称催化、乎性识剐及手性拆分中的应用。     

毛细管电泳技术及其在药物分析中的应用

对毛细管电泳在药物中的分离测定,手性药物的拆分及药物中杂质含量的测定做了综述,并列举了部分手性药物拆分的应用实例。     

唑烷酮类化合物的光合成研究

通过光化学方法取代传统的金属催化等法合成重要的药物中间体唑烷酮,反应条件温和、操作简便、产率较高且污染少.同时研究了丙酮、甲醇、乙腈3种溶剂与水的不同配比对反应产物的影响.随着溶剂极性增加,立体选择性有一定提高.     

含哌啶基的酒石酸衍生物的合成

酒石酸衍生物在对映体拆分和不对称合成中得到广泛应用。文章以酒石酸二乙酯为原料,经过与苯甲醛缩合,氯化铝锂还原,对甲苯磺酰氯酰化,与哌啶亲核取代反应和脱保护五步反应得到1,4-二哌啶基-2,3-丁二醇。该化合物与氢化铝锂络合用于制备手性还原剂。     

Stereoelective polymerization of β-butyrolactone

Racemic β-butyrolactone was polymerized using chiral initiators obtained from the reaction of organometallic derivatives (ZnEt₂, CdMe₂, AlEt₃) with R(−) 3,3 dimethyl-1,2 butanediol. With the zinc initiator, R(+) enantiomer is preferentially incorporated in the polymer chain with a stereoelectivity ratio r_R equal to 1.6. Crude polymer was fractionated into a crystalline, predominantly isotactic, part and an amorphous heterotactic part, both optically active. Sites of different stereospecificities, present in the initiator, are all active for the stereoelective polymerization. With the cadmium initiator, S(−) enantiomer is preferentially polymerized (r_s = 1.01), extending homosteric-antisteric rules previously established for thiiranes. Aluminium initiator leads to an homosteric process (r_R = 1.1). Chiroptical properties (o.r.d. and c.d.) of polymers prepared with zinc initiator show a predominance of R-configurational units, indicating that ring-opening occurs by O-acyl cleavage with retention of configuration.     

Recognition of chiral carboxylic anions by artificial receptors

Many carboxylic molecules, ranging from drugs to flavors and fragrances, contain chiral centers. As a consequence, research has been carried out in order to design and synthesize artificial receptors for carboxylic anions. Many problems have to be solved for binding anions. The results obtained in the binding of carboxylic anions by guanidine, secondary ammonium and metal-center have been selected. The last part of this review focuses on chiral recognition of carboxylic anions by organic and metal-based chiral receptors.     

环糊精包合手性分子的新进展

介绍了环糊精的结构特征及包合性能,环糊精包合手性分子的新进展。重点综述了近几年各类环糊精的包合作用在医药、生命科学及材料科学等领域的新应用,展望了其广阔的前景,期望能在医药学、生命科学及材料科学的应用上更有意义。