毛细管电泳-电化学发光检测抗抑郁药氢溴酸西酞普兰

本文基于氢溴酸西酞普兰(CP)对联钌吡啶(Ru(bpy)23+)的电化学发光有很强的增敏作用,建立了一种毛细管电泳-电化学发光法测定CP的新方法。考察了初始电位、进样时间、进样电压、缓冲溶液组成、浓度及pH值等实验条件对化学发光强度的影响。优化条件下,CP浓度在5.0×10-8~5.0×10-6g/mL范围内与化学发光强度呈良好线性关系(r=0.9943),检出限(S/N=3)为2×10-9g/mL,对1.5×10-7g/mL的CP对照品平行测量9次,迁移时间和峰面积的相对标准偏差分别为1.7%和2.3%。方法成功应用于药物中西酞普兰含量的测定,结果为20.1 mg/tablet,与药品标示值20.0 mg/tablet基本一致,回收率范围在97.2%~102%。     

间接原子发射光谱法测定氢溴酸山莨菪碱

研究了电感耦合等离子体-原子发射光谱法间接测定氢溴酸山莨菪碱。在pH5．0溶液中过量四苯硼钠可使氢溴酸山莨菪碱沉淀完全，加入氯化钾沉淀滤液中剩余的四苯硼钠，测定滤液中过量的钾，可以计算得到氢溴酸山莨菪碱的含量。方法简单快速，回收率在97％～102％之间，相对标准偏差为1．3％。     

Preparation and Crystal Structures of Two Polymorphic Forms of Bupropion Hydrobromide

Two polymorphic forms (forms I and IV) of antidepressant bupropion hydrobro- mides were prepared and characterized by powder X-ray single-crystal diffractometer. Lots of commercial substances may consist of form I. Form I crystallizes in the triclinic system, space group P1 with Z = 2, a = 7.6943(8), b = 7.9347(9), c = 13.8558(15) , α = 85.971(3), β = 85.619(2), γ = 65.974(3)°, V = 769.66(14) 3, Dc = 1.384 g/cm3, formula C13H19ClNOBr, F(000) = 328, μ = 2.83 mm-1, the final R = 0.0579 and wR = 0.1282 for 1756 observed reflections with I > 2σ(I). Another polymorphic form, Ⅳ, belongs to the orthorhombic system, space group Pbca with a = 8.6365(3), b = 12.4167(4), c = 27.7299(9) , Z = 8, V = 2973.67(17) 3, Dc = 1.432 g/cm3, formula C13H19ClNOBr, F(000) = 1312, μ = 2.93 mm-1, the final R = 0.044 and wR = 0.1093 for 2018 observed reflections with I > 2σ(I). In the crystal structure of the two polymorphic forms, expected proton transfer from HBr to amino group of bupropion molecule occurs and intramolecular and intermolecular hydrogen bonds N–H···r are formed. These interactions result in hydrogen-bond dimers in these two forms. The bupropion molecule adopts different conformations in the two investigated solid state modifications.     

Synthesis and Crystal Structure of 4-Arylamino-6-chloropyrido[3,2-d]pyrimidine

The title compounds 4a～c were synthesized and characterized by IR,NMR and MS.The crystal structure of C16H13ClN4O2·HBr·H2O(I),the quaternary ammonium salt of 4c,was determined by X-ray diffraction analysis.I crystallizes in triclinic,space group P1 with a = 8.3121(8),b = 9.3885(8),c = 13.2903(12),α = 106.788(2),β = 95.204(3),γ = 110.871(2)o,V = 905.81(14)3,Z = 2,C16H16BrClN4O3,Mr = 427.68,Dc = 1.568 g/cm3,F(000) = 432.00,μ = 2.446 mm-1,R = 0.0496 and wR = 0.127.X-ray analysis reveals that C(15) in the BrCH2COOH molecule binds to the N(1) of pyrimidine ring to form the quaternary ammonium salt.Two adjacent I molecules are connected by hydrogen bonds through carboxylate oxygen,water molecule and hydrobromic acid.     

NMR法测定复方制剂3组份的相对含量

本文对复方制剂中盐酸伪麻黄碱（Pse)、盐酸苯海拉明（Dip)和氢溴酸右美沙酚（Dex)3组份进行了NMR相对含量的测定。RSD分别为2.22%、3．18％、3．35％，绝对误差（E）分别为1．87％、3．66％、4．23％，方法简便快速，且相当准确。     

离子对色谱法测定氢溴酸东莨菪碱注射液的含量和降解产物

建立了一种用离子对色谱法测定氢溴酸东莨菪碱注射液的含量和降解产物的新方法。该法氢溴酸东莨菪碱浓度在5.868～293.4μg·mL-1范围内与色谱峰峰面积呈良好线性关系,相关系数为0.9999,平均加样回收率为100.70%,相对标准偏差RSD为0.8%(n=6)。方法简便、快速,结果准确,专属性强。     

2α-甲基-2β-溴甲基青霉烷酸二苯甲酯的合成

以6,6-二氢青霉烷酸二苯甲酯-1-氧化物(Ⅰ)和2-巯基苯并噻唑为原料,通过热裂解开环反应和溴代环合反应,制备得到了β-内酰胺酶抑制剂他唑巴坦关键中间体2α-甲基-2β-溴甲基青霉烷酸二苯甲酯(Ⅲ)。考察了反应温度、反应时间、物料比、催化剂用量对目标产物的影响。结果表明,在n(Ⅱ)∶n(HBr)∶n(Na NO_2)=1∶3∶6,催化剂质量分数为4%,-5℃反应2. 5h的条件下,收率为85. 4%。产物结构经1HNMR、FTIR、MS等技术手段得到验证。     

碱金属和稀土溴化物Meyer反应的相化学研究（I）

研究了四元体系ＣｓＢｒ－ＬａＢｒ３－ＨＢｒ（１２％）－Ｈ２Ｏ（２５℃）的相化学关系，绘制了相应的溶度图。在该体系中发现一种新型化合物５ＣｓＢｒ．２ＬａＢｒ３．２２Ｈ２Ｏ；对该人合物进行了偏光、Ｘ射线粉末衍射、ＴＧ及ＤＴＡ等方面的，将本体系与四元系ＣｓＣｌ－ＬａＣｌ３－ＨＣｌ（１３％）－Ｈ２Ｏ（２５℃）相比较，发现两者在生命化合物的数量、种类和相化学行为方面均有较大的差异。     

CsBr与SmBr3在氢溴酸介质中反应的相化学

由于稀碱稀土卤化物特殊的材料性能，正日益受到各国科学家的关注［‘－3］．动年代初，M：y：：提出了下述4种类型卤化物A’RE？X7（1：2型）、AIREyXgta：2型）、AIRE”X6ta：l型）及AgRE”X。（2：l型）的合成方法（A为碱金属）分析Meyer等人的合成方法网；发现其初始反应是     

Quasi-classical trajectory approach to the O（1D）＋HBr ）OH＋Br reaction stereo-dynamics on X1A＇ potential energy surface

The vector properties of reaction O(¹D)+HBr→ OH+Br on the potential energy surface (PES) of X¹A′ ground singlet state are studied by using the quasi-classical trajectory (QCT) theory. The polarization-dependent differential cross sections (PDDCSs), the average rotational alignment factor 2(j′· k)>, as well as the distributions reflecting vector correlations are also computed. The analysis of the results shows that the alignment and the orientation distribution of the rotation angular momentum vector of product molecule OH is influenced by both the effect of heavy-light-heavy (HLH) type mass combination and the deep well of PES.