A Novel Fused Phosphorus Heterocycle: 4-(1'''',2'''',3'''',4-Tetrahydro-1, 3, 2-benzodiazaphosphorin-2''''-sulfide)-3, 4b, 4a-thiazphosphaphenanthridine Derivative

Organophosphorus compounds are ubiquitous in nature and they have broad applications in the fields of agriculture and medicine1-4. There has been a considerably growing interest in heterocyclic compounds due to their pharmaceutical importance and extensive application in organic synthesis, and the application of heterocycles is suggested to enhance the biological activity and/or offer other diverse properties5-7. In the previous work8, we have reported that 11-ethoxycarbonylmethyl-6-oxo-3, 4…     

Structure of Ethanol Coordinated 1,8,15,22-Tetra-(2'''',2'''',4''''-trimethyl-3''''-pentoxy)phthalocyaninatocobalt

1 INTRODUCTION Phthalocyanine and their metal complexes are important materials for the application in advanced technologies[1]. To meet some special purposes in various applications, the introduction of certain kind of substituents to the peripheral po…     

三七中2-(1'''',2'''',3'''',4''''-四羟基丁基)-6-(2",3",4"-三羟基丁基)-吡嗪的分离、鉴定及药理活性研究

从三七水溶性成分中首次分离得到一个多羟基吡嗪衍生物 .该化合物经 MS,NMR,1 H-1 H COSY,1 3 C-1 H COSY和 HMBC等鉴定其结构为 2 -( 1 ,2 ,3 ,4 -四羟基丁基 ) -6 -( 2 ",3",4 "-三羟基丁基 ) -吡嗪 .对该分离样品进行了合成对照和药理活性研究     

Crystal Structure of trans－2－（1－Naphthyl）－1－（p－（4＇，4＇，5＇，5＇－tetramethyl－4＇，5＇－dihydro－1＇H－imidazolyl－1＇－oxy－3＇－oxide）－phenyl）－imine，C_（24）H_（24）N_3O_2

ＣｒｙｓｔａｌＳｔｒｕｃｔｕｒｅｏｆｔｒａｎｓ－２－（１－Ｎａｐｈｔｈｙｌ）－１－（ｐ－（４＇，４＇，５＇，５＇－ｔｅｔｒａｍｅｔｈｙｌ－４＇，５＇－ｄｉｈｙｄｒｏ－１＇Ｈ－ｉｍｉｄａｚｏｌｙｌ－１＇－ｏｘｙ－３＇－ｏｘｉｄｅ）－ｐｈｅｎｙｌ）－ｉｍ...     

2＇，3＇－O－异亚丙基－5＇－O－［N，N－二（2－氯乙基）磷酰胺基］核苷的合成

２＇，３＇－Ｏ－异亚丙基－５＇－Ｏ－［Ｎ，Ｎ－二（２－氯乙基）磷酰胺基］核苷的合成陈茹玉，迟国臣，陈小茹（南开大学元素有机化学研究所，天津，３０００７１）关键词核苷，亚磷酰化，抗肿瘤活性很多核苷类化合物具有很好的抗肿瘤、抗病毒等生物活性，某些化合物已...     

3-烷基/芳基-6-(3’-吡啶基)均三唑并[3,4,-b]-1,3,4-噻二唑类化合物的合成

前文指出,三唑并噻二唑类化合物之所以显示出广谱生物活性,无疑起因于其基本骨架。但核上取代基位置及结构的影响又是不可忽视的,深入研究很有必要。考虑烷基以及芳氧亚甲基醚能增加分子脂溶性及负电性,有可     

［Cu_2（C_6H_5COO）_4（C_3H_4N_2S）_2］的合成、晶体结

在２－氨基噻唑存在下，利用铜粉和过氧化苯甲酰的氧比加成反应，在丙酮中合成了双核铜（Ⅱ）配合物［Ｃｕ_２（Ｃ_６Ｈ_５ＣＯＯ）_４（Ｃ_３Ｈ_４Ｎ_２Ｓ）２］．晶体属单斜晶系，Ｐ２１／ｎ空间群，晶胞参数：ａ＝１．０６８５（１）ｎｍ，ｂ＝１．９０２８（６）ｎｍ，ｃ＝１．７０４６（９）ｎｍ；α＝γ＝９０°，β＝９６．４９（３）°，Ｖ＝３．４４３（４）ｎｍ~３，Ｚ＝４．Ｆ（０００）＝８２４，Ｄｃ＝１．５５５８ｇ／ｃｍ~３，μ＝１４．０７８ｃｍ~（－１），最终偏离因子Ｒ＝０．０４８２１，Ｒｗ＝０．０５３１４．通过元素分析、ＩＲ、ＴＧ、Ｘ射线粉末衍射表征了配合物的结构．     

新型受阻胺光稳定剂3-（2，2，6，6-四甲基哌啶4-氨基）丙酸十二酯的合成

建立了受阻胺光稳定剂3-(2,2,6,6-四甲基哌啶-4-氨基)丙酸十二酯的合成工艺.以2,2,6,6-四甲基-4-哌啶胺、丙烯酸甲酯为原料,经M ichael加成,生成的3-(2,2,6,6-四甲基哌啶-4-氨基)丙酸甲酯再与十二醇进行酯交换反应制得.并对所涉及的酯交换反应的工艺参数进行了优化.实验结果表明,四异丙基钛酸酯催化剂的催化效果最好;在3-(2,2,6,6-四甲基哌啶-4-氨基)丙酸甲酯与十二醇的摩尔比为1∶1.10,四异丙基钛酸酯催化剂的用量为反应物总质量的0.30%,反应温度180℃,反应时间8 h的条件下,酯交换反应收率为90.6%.该工艺总收率为86.3%.目标产物及中间体的结构通过MS进行了表征.     

4＇－甲氧基－2＇，7－二羟基黄烷酮的合成

２－羟基－４－甲氧基甲氧基苯乙酮与２－甲氧基甲氧基－４－甲氧基苯甲醛经缩合、环化、除保护基等反应合成了４＇－甲氧基－２＇，７－二羟基黄烷酮。     

由2',4'-二氢-6'-甲氧基-3',5'-二甲基查耳酮合成新黄酮

在DMSO/ I2的氧化作用下,由2',4'-二氢-6'-甲氧基-3',5'-二甲基查耳酮可合成一种全新结构的黄酮:7-羟基-5-甲氧基-6,8-二甲基黄酮(产率91%),而在HCl/MeOH作用下则得到了两种黄烷酮:7-羟基-5-甲氧基-6,8-二甲基黄烷酮 (产率70%) 和 5,7-二羟基-6,8-二甲基黄烷酮 (产率20%).     

6′，6″-二吡啶基-2，2′：4′，4″：2″，2′′′-四联吡啶稀土配合物的合成、表征及荧光性质研究(英)

Two series of solid complexes of rare earth nitrates and picrates with the “back-to-back” terpyridine, 6′,6″-bis(2-pyridyl)-2,2′:4′,4″:2″,2′′′-quaterpyridine (L) have been synthesized. These complexes have been characterized by elemental analysis, conductivity measurements, thermal analysis and IR spectroscopy. At the same time, the luminescent properties of the Eu(Ⅲ) and Tb(Ⅲ) complexes were also studied.     

Enantioselective synthesis of 2-amino-4-(nitromethyl)-4H-chromene-3-carbonitriles from 2-iminochromenes

A series of medicinally important 2-amino-4-(nitromethyl)-4H-chromene-3-carbonitriles were synthesized using enantioselective conjugate addition of nitromethane to 2-iminochromenes. The reactions were performed using L8-Cu (II) catalytic system and moderate to good enantioselectivities (62–88%) and yields (66–96%) were obtained.     

Synthesis and Crystal Structure of (p-{2-[p-(5''''-Phenyl-1'''',3'''',4''''-oxadiazole-2''''-yl)-phenyl]- vinyl}-phenyl)-di-p-tolyl-amine

1 INTRODUCTION Triarylamines constitute a well known class of hole conducting material[1～4]. On the other hand , oxadiazole-based compounds as good electron- transporting materials[5,6] have played an important role in the fabrication of multiple-layer light- emitting diode devices. It is well known that, to achieve good performance in electroluminescence (EL) devices, the injection of electron and hole should be in balance[7]. The requirement might be met in a new compound containing …     

Reactions of [Re(NO)2(PR3)2][BArF 4] complexes with phenylacetylene

The reaction of [Re(NO)₂(PR₃)₂][BAr^F ₄] (R = cyclo-C₆H₁₃ (1a), Prⁱ (1b); [BAr^F ₄]^– = [B(3,5-(CF₃)₂C₆H₃)₄]) with phenylacetylene in the presence of a non-nucleophilic base, like 2,6-bis(tert-butyl)pyridine (BTBP) or Bu^tOK, affords the phenylethynyl complexes [Re(CCPh)(NO)₂(PR₃)₂] (R = cyclo-C₆H₁₃ (2a); Prⁱ (2b)) in moderate yields. In the absence of a base, complexes 1a and 1b are transformed into the compounds [Re(CCPh)(CH=C(Ph)ONH)(NO)(PR₃)₂][BAr^F ₄] (3a and 3b, respectively). The structure of complex 3a was confirmed by X-ray diffraction analysis. The latter reaction is proposed to be initiated by deprotonation of the terminal alkyne H atom by the bent nitrosyl ligand followed by the subsequent 1,3-dipolar addition of the ReN(H)O moiety to phenylacetylene.     

The preparation of 3-methyl-4-nitro-5-(2-alkylethenyl)isoxazoles

We report the first synthetic route to prepare 3-methyl-4-nitro-5-(2-alkylethenyl)isoxazoles in high yields and exclusively as E-diastereoisomers.     

Study on the syntheses of new 1-o-chlorobenzoyl-3-(5''''-substituted phenylamino-6''''-phenyl)-1'''',2'''',4''''-triazinyl ureas

Eight new 1-o-chlorobenzoyl-3-(5'-substituted phenylamino-6'-phenyl)-1',2',4'-triazinyl ureas (5a-h) have been synthesized and their bioactivities were detected.     

2′-脱氧-2′-氟-2′-尿嘧啶-3′,4′-O-异亚丙基-L-阿拉伯糖甲苷的合成

目前,氟代糖和氟代糖苷在抗肿瘤和抗病毒的研究方面已引起人们的广泛兴趣,由于     

2',3'-二脱氧-2',3'-二去氢鸟嘌呤核苷构象稳定性的理论研究

采用密度泛函方法在B3LYP/6-31＋G**水平上研究了2',3'-二脱氧-2',3'-二去氢鸟嘌呤核苷分子(D4G)的构象. 分别研究在气相中的孤立分子和一水合物异构体的相对稳定性和异构体之间的相互转变过程, 分析了水分子的参与对D4G异构体的相对稳定性和几何结构参数以及自然电荷的影响. 结果表明, 孤立的D4G分子在气相中存在8种稳定构象, 其中构象d4g-2是所有构象中最稳定的, 气相中D4G主要以d4g-2存在. 气相中各构象的相对稳定性为: d4g-2＞d4g-1＞d4g-5＞d4g-3＞d4g-6＞d4g-4＞d4g-8＞d4g-7. 计算得到的各构象键长和键角数据与实验值接近. 一个水分子的加入对D4G分子的构型参数有所影响, 基本不改变D4G分子各构象的稳定性顺序, 但构象转变的能垒有所提高. 氢键在分子构象中发挥了重要作用.     

核磁共振方法表征2,2''''-二(对羧酸苯氧基)-1,1''''联萘

利用１Ｈ ＮＭＲ，１３Ｃ ＮＭＲ研究了 ２，２’－二（对羧酸苯氧基）－１，１’－联萘结构，并通过１Ｈ－１Ｈ ＣＯＳＹ及１３Ｃ－１Ｈ异核相关谱进一步确定了其１Ｈ谱和１３Ｃ谱中各谱峰的归属，为同类化合物的表征提供了一个依据。     

LiFe(MoO4)2, LiGa(MoO4)2 and Li3Ga(MoO4)3

The structures of lithium iron dimolybdate, LiFe(MoO₄)₂, and lithium gallium dimolybdate, LiGa(MoO₄)₂, are shown to be isomorphous with each other. Their structures consist of segregated layers of LiO₆ bicapped trigonal bipyramids and Fe(Ga)O₆ octahedra separated and linked by layers of isolated MoO₄ tetrahedra. The redetermined structure of trilithium gallium trimolybdate, Li₃Ga(MoO₄)₃, shows substitional disorder on the Li/Ga site and consists of perpendicular chains of LiO₆ trigonal prisms and two types of differently linked Li/GaO₆ octahedra.