α-单取代环十二酮肟及缩氨基硫脲的合成及晶体结构

单晶X射线衍射分析表明, α-单取代环十二酮与氨衍生物羟胺和氨基硫脲发生缩合反应得到两种母体构象均为[3333], 而取代基为边外向或角反向的α-单取代环十二酮肟或缩氨基硫脲. 利用底物的“角位羰基参与反应”原理, “记忆效应”及进攻试剂与底物是否形成氢键解释了这一实验结果. 通常情况下, 试剂从空间障碍小的一面进攻羰基而生成α-角反取代环十二酮肟或缩氨基硫脲. 当试剂与底物的取代基之间能够形成分子间氢键时, 则生成α-边外取代环十二酮肟或缩氨基硫脲.     

α-硝基环烷酮的制备及其合成应用

介绍了α-硝基环烷酮的制备方法, 以及它们的特殊反应性和合成应用, 参考文献40多篇.     

α-单取代环十二酮构象的研究

利用分子力学计算，单晶X射线分析和~1H NMR技术研究了α-单取代环十二酮 的构象。结果表明，它们的优势构象的环骨架仍是[3333]构象，而羰基则在2-C位 置上。在晶体中，它们的优势构象为α－角顺取代[3333]-2-酮构象，而在溶液中 则取α－角顺取代和α－边外取代[3333]-2-酮两种构象，且两种构象处于动力学 平衡之中，以α－边外取代[3333]-2-酮构象占优势。     

Development of a novel method combining HPLC fingerprint and multi-ingredients quantitative analysis for quality evaluation of traditional Chinese medicine preparation

A novel method combining high performance liquid chromatography (HPLC) fingerprint and simultanous quantitative analysis of multiple acitve components was developed and validated for quality evaluation of one type of traditional Chinese medicine preparations: Shuang-huang-lian (SHL) oral liquid formulation. For fingerprint analysis, 45 peaks were selected as the common peaks to evaluate the similarities among several different SHL oral liquid preparations collected from manufacturers. Additionally, simultanous quantification of eleven markers, including chlorogenic acid, caffeic acid, rutin, forsythiaside, scutellarin, baicalin, forsythin, luteoloside, apigenin, baicalein and wogonin, was performed. Statistical analysis of the obtained data demonstrated that our method has achieved desired linearity, precision and accuracy. Finally, concentrations of these eleven markers in SHL oral liquid prepared by different manufacturers in China were determined. These results demonstrated that the combination of HPLC chromatographic fingerprint and simultaneous quantification of multi-ingredients offers an efficient and reliable approach for quality evaluation of SHL oral liquid preparations.     

The generalization of charged AdS black hole specific volume and number density

In this paper, by proposing a generalized specific volume, we restudy the P–V criticality of charged AdS black holes in the extended phase space. The results show that most of the previous conclusions can be generalized without change, but the ratio \({\tilde{\rho }}_c\) should be \(3 {\tilde{\alpha }}/16\) in general case. Further research on the thermodynamical phase transition of black hole leads us to a natural interpretation of our assumption, and more black hole properties can be generalized. Finally, we study the number density for charged AdS black hole in higher dimensions, the results show the necessity of our assumption.     

6-烷氧基乙氧/硫基-6-氧/硫-双苯并[1,3,2]-二氧磷杂八环的合成与波谱特征

通过双(3,5-二氯-2-羟基-苯基)甲烷(1)分别与POCl₃或PSCl₃在三乙胺存在下关环, 再与单烷氧基乙醇钠作用, 得到了新化合物5或6; 以1与P₄S₁₀及三乙胺关环的产物4与烷氧基溴乙烷反应得到了7. 测试了5, 6和7的¹H, ¹³C和³¹P NMR及MS数据, 并讨论了其特征. 观察到了磷与C¹H (C¹¹H)或C³H (C⁹H)与P的⁵J_PH偶合常数(约为0.9 Hz). 在1与POCl₃关环产物与单甲氧基乙醇反应的产物中, 分离到了一个副产物8并确定了它的化学结构. 1与POCl₃按3∶2的物质的量比在三乙胺存在下反应, 得到收率75%的8.     

一种新的合成12-氧代-1,15-十五内酰胺的方法

设计了一种新的合成12-氧代-1,15-十五内酰胺(4)的方法, 即以α-硝基环十二酮(1)为原料, 经与丙烯腈的Michael加成, 氰基选择性还原为氨基后扩环, 再经Nef反应合成了4, 总收率为28%.     

两个新颖的联环十二烷衍生物的合成及结构表征

2-（2＇-Oxo-3＇-oximidocyclododecyl） cyclododecanone （1） and 2-（1＇-hydroxylcyclododecyl） cyclododecanone （2） were synthesized and characterized. The conformation analysis was carried out based on the NMR, molecular mechanics calculation and X-ray diffraction. The conformation of two cyclododecyl moieties of both 1 and 2 was found to be the [3333]-2-one or [3333] square conformation both in the crystal state and the solution. The dihedral angle between carbonyl and the oxime double bond of the ring B is 180°in the crystal of 1. The protons or hydroxyl group of carbon atoms to link the two cyclododecyl moieties of 1 and 2 constitute dihedral angles of 174°in the crystal, and 175°in the solution, and the C-C 6 bond between two cyclododecyl moieties can not freely rotate in the solid state and the solution. In addition, compound 2 was the first example of a-comer-anti-monosubstituted cyclododecanone. synthesis     

12-(酰氧亚氨基)-1,15-十五内酯的合成及结构表征

以α-硝基环十二酮为原料,与丙烯醛加成、扩环并经Nef反应合成了12-氧代-1,15-十五内酯,再经成肟和酰化及硅胶柱层析分离分别得到12-(酰氧亚氨基)-1,15-十五内酯的顺式及反式异构体.结构经IR,¹HNMR及元素分析确证.通过对个别化合物的单晶X射线分析,结合¹HNMR数据,分别确定了它们的Z,E构型.结果表明,12-氧代-1,15-十五内酯成肟时对顺、反异构体的形成缺少明显的选择性,而目标化合物环骨架的优势构象为[23434],羰基和肟基位于两个不同的角碳位置.     

N-取代-α-氧代环十二烷基磺酰胶的合成及其杀菌活性

以易得的环十二酮为原料，由磺化获得中间体α-氧代环十二烷基磺酸后，再经生成磺酰、氯和胺化反应合成了一系列N-取代-α-氧代环十二烷基磺酰胺（Ⅲ）．生物活性测定结果表明，它们对小麦赤霉病菌（Gibberellazeae）的生长具有抑制作用，其中活性最高的是氮上取代有一氯苯基的化合物（Ⅲ7、Ⅲ8），通过构象分析讨论了它们的结构-活性关系．