Potassium iodide catalyzed reductive dehalogenation ofα-halo-ketones using Hantzsch ester diethyl 1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylate as reductant

In the presence of diethyl 1,4-dihydro-2,6-dimethylpyridine-3,5-dicarboxylate（DHP） and a catalytic amount of potassium iodide,severalα-halo ketones were easily reduced to the corresponding ketones in acetone media.The procedure presented here showed several merits such as short reaction time,practical experimental and isolated procedure,and excellent yields of products.

A facile synthesis of 2,3-dihydro-2-aryl-4(1H)-quinazolinones catalyzed by scandium(Ⅲ) triflate

2,3-Dihydro-2-aryl-4（1H）-quinazolinones were prepared in good yields via condensation of o-aminobenzamide with aldehydes promoted by a catalytic amount of Sc（OTf）3 under mild conditions.

1,6-二氢-4-甲基-6-氧代-3-吡啶磺酰氯的合成工艺研究

1,6-二氢-4-甲基-6-氧代-3-吡啶磺酰氯是一种重要医药化工中间体。本文以4-甲基-5-硝基吡啶-2-醇为原料,经两步反应得到目标化合物。该合成方法操作简便、后处理操作简便,花费时间少且产物纯度高,产品收率为33.51%;此方法为1,6-二氢-4-甲基-6-氧代-3-吡啶磺酰氯的合成提供了合成路线,也为进一步相关类似的合成研究奠定基础。

Synthesis and Crystal Structure of Ethyl 3-(4-Chlorophenyl)-3,4-dihydro-6-methyl-4-oxo-2-(pyrrolidin-1-yl)furo[2,3-d]pyrimidine-5-carboxylate

The crystal structure of the title compound ethyl 3-（4-chlorophenyl）-3,4-dihydro-6- methyl-4-oxo-2-（pyrrolidin-1-yl）furo[2,3-d]pyrimidine-5-carboxylate （C20H20ClN3O4, Mr= 401.84） has been prepared and determined by single-crystal X-ray diffraction. The crystal is of monoclinic, space group P21/n with a = 20.6215（9）, b = 8.5311（4）, c = 21.6886（9） A^°, β = 91.607（1）°, V = 3814.0（3）A^°^3, Z = 8, Dc = 1.400 g/cm^3, F（000） = 1680, μ = 0.233 mm^-1, R = 0.0718 and wR = 0.1545 for 6717 observed reflections with I 〉 2σ（I）. X-ray diffraction analysis reveals two crystallographically independent molecules in the asymmetric unit.

Crystal Structure of Phenol,2-[4(S)-4-Dihydro-4-benzyl-2-ozazolinyl]

The compound phenol,2-[4（S）-4,5-dihydro-4-phenyl-2-ozazolinyl（1,C15H13NO2） was synthesized with a simple,one step method free of water and air.It was obtained in a moderate yield from the reaction of 2-hydroxybenzonitrile with optically active amino alcohol in chloroben-zene under dry,anaerobic conditions.It belongs to the orthorhombic system,space group P212121 with a = 5.786（5）,b = 10.730（5）,c = 19.722（5）,C15H13NO2,Mr = 239.26,V = 1224.4（12）3,Z = 4 and Dc = 1.298 mg/m3.The final R = 0.0324 for 1627 observed reflections with Ⅰ 〉 2σ（Ⅰ） and Rw = 0.0826 for all data.The structure of compound 1 was determined by X-ray diffraction,NMR and HRMS.

Extraction of Th(IV) from nitric acid with 4-benzoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione

The BMPPT (4-benzoyl-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-thione)was synthesized from BMPP. Its m.p. is 106-108℃. The results of the element analysis are as follows: C, 68.51%, H, 4.51%, N, 9.26%, S, 11.47%, which are in conformity with the theoretical value (C, 69.15%, H, 4.76%, N, 9.52%, S, 10.90%). The solvent extraction of Th4+ from nitric acid solution by BMPPT in benzene was studied. The extraction ability of BMPPT is not so high as that of its parent (BMPP). The Th4+ distribution ratio (DTh) increases with the increasing pH of the aqueous phase, and pH1/2 for Th4+ was 3.2 ([BMPPT]=0.10 mol/L). When the pH increases, the distribution ratio of Th4+ increases linearly with the slope of 1 .59. When the concentration of BMPPT increases, the distribution ratio of Th4+ increases rapidly. The lgDTh-lg[BMPPT] is linear with the slope of 1.42 and the extraction mechanism is the cation ion-exchange.

Synthesis and Crystal Structure of 4-tert-Butyl-6-(4-chlorophenyl)-3,6-dihydro-2H-1,3-thiazin-2-iminium Chloride

The title compound, 4-tert-butyl-6-（4-chlorophenyl）-3,6-dihydro-2H-1,3-thiazin- 2-iminium chloride （C14H18C12N2S）, has been synthesized by the reaction of 1-（4-chlorophenyl）- 4,4-dimethylpent-1-en-3-one with thiourea, and its crystal structure was determined by single- crystal X-ray diffraction. The crystal belongs to the monoclinic system, space group P211c with a = 16.3064（11）, b = 9.4471（6）, c = 11.2626 （8）A, β = 108.400（1）°, Z = 4, V = 1646.28（19） A^3, Mr = 317.26, Dc = 1.280 g/cm^3, S = 1.078,μ = 0.510 mm^-1, F（000） = 664, the final R = 0.0514 and wR = 0.1412 for 3210 observed reflections （I 〉 2σ（I））. The thiazine ring system displays a twisted boat conformation, and three N-H,..Cl hydrogen bonds exist in the crystal. The combination of two N-H...Cl hydrogen bonds generate an R2^1 （6） ring.

1,5-Dimethy-4-[(3-nitro-benzylidene)-amino]-2-pheyl-1,2-dihydro-pyrazol-3-one

The title compound C18H16N4O3 （Mr = 336.35） has been synthesized and characterized by elemental analysis and single-crystal X-ray diffraction. The Schiff base compound is a derivative of 4-aminoantipyrine. As expected, the molecular structure adopts a trans configuration about the central C=N double bond. It crystallizes in orthorhombic, space group P2dc with a = 7.632（1）, b = 7.816（1）, c = 28.082（5） A,β = 96.18（1）°, V= 1665.48（51） A^3, Z= 4, Dc = 1.341 g/cm^3, F（000） = 704,μ = 0.094 mm^-1, the final R = 0.0448 and wR = 0.1058. Of the total 3748 collections, 3105 were unique. In the molecule there exist two different planes of pyrazoline and C（11）-C（16） phenyl ring, which are approximately coplanar （r.m.s. de deviation from the combined mean plane is 0.03 A） with the dihedral angle between them of 9.8%.

Synthesis and Crystal Structure of Tert-butyl 4-[(E)-4-(1,3-Dioxo-1,3-dihydro-2H-isoindol-2-yl)-1-butenyl] Benzoate

The title compound tert-butyl 4-[（E）-4-（1,3-dioxo-1,3-dihydro-2H-isoindol-2-yl）- 1-butenyl] benzoate has been synthesized and characterized by X-ray crystallography. It crystallizes in monoclinic, space group C2/c with a = 14.875（3）, b = 8.9796（13）, c = 34.736（6） A°, β = 95.981（4）°, V= 4614.4（14）A°^3, Z= 8, Dc = 1.213 g/cm^3, F（000） = 1792,μ（MoKα） = 0.084 mm^-1, R = 0.0602 and wR = 0.1445 for 4613 unique reflections with 2272 observed ones （I〉 2σ（I））. The results of crystal structure determination show that the title compound has a layer structure, and the two benzene rings in molecule are parallel to each other.

Synthesis and Crystal Structure of a New Quinazolinone Compound 2,3-Dihydro-2-(2-hydroxyphenyl)-3-phenyl-quinazolin-4(1H)-one

A new quinazolinone compound 2,3-dihydro-2-(2-hydroxyphenyl)-3-phenyl- quinazolin-4(1H)-one 3 ([C20H16O2N2]?C2H5OH, Mr = 362.42) and compound 2-(2-hydroxy- benzylidene-amino)-N-phenyl-benzamide 2 (C20H16O2N2, Mr = 316.34) were prepared from a precursor of 2-amino-N-phenyl-benzamide 1 (C13H12ON2, Mr = 212.25). Compound 3 was characterized by single-crystal X-ray diffraction analysis. The crystal belongs to orthorhombic, space group Pbca with a = 1.2889(11), b = 1.6170(14), c = 1.7729(15) nm, V = 3.695(6) nm3, Z = 8, F(000) = 1536, Mr = 362.42, Dc = 1.303 g/cm3, μ(MoKα) = 0.087 mm-1, R = 0.0447 and wR = 0.0879. The crystal structure analysis indicates that the title compound has a two-dimensional network structure formed by hydrogen bonds and electrostatic interactions.

Determination of Trace Silver( Ⅰ ) in Basic Aqueous Solution by Electrochemiluminescence of a New Reagent 6-(2-Hydroxy-4-Diethylaminophenylazo)-2,3-Dihydro-1,4-Phthalazine-1,4-Dione

The electrochemiluminescence (ECL) of a new reagent 6- (2-hydroxy- 4 diethy laminophenylazo)-2,3-dihydro-1 ,4-phthalazine-1,4-dione (HDEA) in a basic aqueous so lution was studied by using the apparatus designed by ourselves. Trace amounts of silver ( Ⅰ ) shows a significant effect on the efficiency of light emission of HDEA during a positive trigonometrical wave pulse was exerted on the solution. The linear relationship between the light intensity and the concentration of silver( Ⅰ ) occurs in the range of 5. 0×10-8 to 3. 0×10-8 mol/L Ag(Ⅰ ) in a medium of KOH-KCl-HDEA (pH= 12. 8). The detection limit of the method is 2. 0×10-8 mol/LAg( Ⅰ ), and the r. s. d. for 1.0×10-7 mo)/L Ag ( Ⅰ ) is 5%. Of 21 metal ions concerned, only nickel( Ⅱ ), cerium( Ⅳ ) and cobalt( Ⅱ ) interfere the silver detection seriously; Ⅰ and Br also have some interference.

过氧化物酶新型荧光底物3,4-二氢-2(1H)-喹喔啉酮的反应机理及性能的研究

合成了过氧化物酶新型荧光底物3，4-二氢-2（1H）-喹喔啉酮（DHQXL）．在过氧化物酶催化下，该化合物可被H2O2氧化生成强荧光物质2（1H）－喹喔啉酮（QXL）．用高压液相色谱法分离得荧光产物纯品，经核磁共振谱和质谱证实其结构，确证了提出的酶催化反应机理．对该化合物作为荧光底物的性能研究表明，它是一个很有应用前景的过氧化物酶的新型荧光底物．

1-芳基-3-烷基-1,4-二氢-4-取代-5H-1,2,4-三唑啉酮-5衍生物的合成及生物活性

为寻找新的高效非肽类血管紧张素Ⅱ（AⅡ）受体括抗剂,以SC-51316为先导,运用生物电子等排和拼合原理,设计并合成了9个1-芳基-3-烷基-1,4-二氢-4-取代-5H-1,2,4-三唑啉酮-5衍生物。所有目的化合物均未见文献报道,其结构经IR、1HNMR和MS鉴定。初步体外药理实验表明：在抑制AⅡ诱发的兔主动脉收缩反应模型中,化合物17h具有较好的活性。

2-取代-2,3-二氢-4(1H)-喹唑啉酮衍生物合成方法

在氯化铝催化作用下,以水为溶剂,将2-氨基苯甲酰胺和醛/酮室温研磨后,温度为60℃时加热反应,可有效环化合成一系列2-取代-2,3-二氢-4(1H)-喹唑啉酮衍生物。比较不同催化剂的催化活性,考察了催化剂和水的用量对收率的影响。结果表明,在n(2-氨基苯甲酰胺)/n(醛/酮)=1∶1,催化剂摩尔分数为1%,水体积2 mL的反应条件下,实验结果最好。产品结构经IR,1H-NMR,质谱,元素分析进行表征,并提出可能的催化反应机理。

6-溴甲基-3,4-二氢-2-甲基-4-氧代喹唑啉的合成

用对甲基苯胺与水合三氯乙醛、盐酸羟胺反应制得对甲基 (N 肟基乙酰 )苯胺 ,再与浓硫酸反应生成 5 甲基靛红 ,后经碱性过氧化氢氧化 ,制得 2 氨基 5 甲基苯甲酸。将 2 氨基 5 甲基苯甲酸与硫代乙酰胺反应生成的 3 ,4 二氢 2 ,6 二甲基 4 氧代喹唑啉 ,经N 溴代琥珀酰亚胺溴化得到标题化合物 ,其结构经IR、MS、1HNMR和元素分析确证 ,5步反应总收率为 2 3 1 %。

3H－1，2－二氢－2－（4－甲基苯胺基）甲基－1－吡咯里嗪酮在家兔体内主要代谢产物的研究

用高效液相色谱法对家兔单剂量ｉｇ７５０ｍｇ新抗炎镇痛剂３Ｈ－１，２二氢－２－（４－甲基苯胺基）－甲基－１－吡咯里嗪酮（Ｚ－４７）后尿中的代谢物进行了分离、检测。根据代谢物的色谱行为及与Ｚ－４７结构有关的其它药物的代谢途径，推测Ｚ－４７羧基衍生物［４－（３Ｈ－１，２－二氢－１－吡咯里嗪酮－２－甲基胺基）苯甲酸］是一可能的代谢产物，遂用化学方法合成了该衍生物。利用色谱保留值、紫外双波长吸收比值等对代谢物和标准品进行比较，并对尿样的酶水解产物进行色谱分析，证实Ｚ－４７羧基衍生物及其酯型β－Ｄ－葡糖苷酸结合物是Ｚ－４７在家兔体内的主要代谢产物。

阿立哌唑中间体3,4-二氢-7-(4-氯丁氧基)-2-(1H)-喹啉酮的合成

3,4-二氢-7-(4-氯丁氧基)-2-(1H)-喹啉酮(DCHQ)是抗精神分裂症药物阿立哌唑的关键中间体。以间氨基苯酚为原料,经酰化,傅克烷基化,取代反应合成阿立哌唑中间体。其中3-氯-N-(3-羟基苯基)-丙酰胺(中间体1)收率95%,3,4-二氢-7-羟基-2-(1H)-喹啉酮(中间体2)收率63.2%,DCHQ收率92%。该工艺反应条件温和易于控制,反应时间短,收率高,适合工业化生产。

2,6-二甲基-4-(2-氯苯基)-1,4-二氢-3,5-吡啶二羧酸二甲酯对大鼠野百合碱性肺动脉高压的防治作用

用野百合碱（ＭＣＴ）复制大鼠慢性肺动脉高压（ＰＨ）病理模型，探讨钙拮抗剂２，６－二甲基－４－（２－氯苯基）－１，４－二氢－３，５－吡啶二羧酸二甲酯（ＤＣＤＤＰ）对ＰＨ的防治作用．ＤＣＤＤＰ５，５０，５００μｇ·ｋｇ－１ｉｐ，每日１次，连续２８ｄ；ＭＣＴ６０ｍｇ·ｋｇ－１在第１次给ＤＣＤＤＰ后３０ｍｉｎｓｃ．观察肺血流动力学指标变化，血浆和肺匀浆中内皮素样免疫反应物（ｉｒ－ＥＴ），一氧化氮（ＮＯ）含量，超氧化物歧化酶（ＳＯＤ）活性和丙二醛（ＭＤＡ）含量的改变．三种不同剂量的ＤＣＤＤＰ分别使平均肺动脉压从４．５±０．９ｋＰａ（ＭＣＴ组）降至３．２±０．２，３．５±０．６和３．８±０．９ｋＰａ，肺血管阻力从１１８±１７ｋＰａ·ｍｉｎ－１·Ｌ－１（ＭＣＴ组）降至６５±１６，６８±１８和７６±１８ｋＰａ·ｍｉｎ－１·Ｌ－１（Ｐ＜０．０１），提示在本实验剂量范围内，中，低剂量ＤＣＤＤＰ防治效果似较好．ＤＣＤＤＰ不影响ＭＣＴ性ＰＨ时血浆和肺匀浆中ｉｒ－ＥＴ的改变，但可显著升高肺匀浆中ＮＯ的含量和ＳＯＤ活性，使肺匀浆中ＭＤＡ含量降至正常，这可能是其降低肺动脉压的机理之一．

2-芳基-2,3-二氢-4H-1,3-苯并噻嗪-4-酮类化合物的设计、合成及抗真菌活性

目的设计并合成2-芳基-2,3-二氢-4H-1,3-苯并噻嗪-4-酮类化合物,测定体外抗真菌活性、建立初步构效关系。方法以邻氨基苯甲酸为起始原料,经过重氮化及硫代反应制得二硫代水杨酸,再经过氯代、氨解、缩合等步骤制得目标化合物。采用2倍浓度稀释法,选用8种临床上常见的致病真菌为测试菌株,以氟康唑和伊曲康唑为阳性对照药,测试了目标化合物的体外抗真菌活性。结果与结论设计并合成了24个2-芳基-2,3-二氢-4H-1,3-苯并噻嗪-4-酮类化合物,目标化合物的结构经1H-NMR、MS确证;活性测试结果表明,目标化合物对测试真菌表现出不同程度的体外抑菌活性,所有化合物对红色毛藓菌和根霉菌的活性均好于阳性对照药。

除草剂氟酮磺隆中间体5-甲氧基-4-甲基-2,4-二氢-1,2,4-三唑-3-酮的合成

5-甲氧基-4-甲基-1,2,4-三唑-3-酮是氟酮磺隆的关键中间体。以硫氰酸钾和氯甲酸甲酯为起始原料,经三步反应得到目的产物。(1)以甲基异丁酮为溶剂,硫氰酸钠和氯甲酸甲酯、甲醇反应制得1,3-二甲基硫代亚胺二羟酸酯;(2)以上产物与水合肼环化制得5-甲氧基-2,4-二氢-3H-1,2,4-三唑-3-酮;(3)经硫酸二甲酯甲基化制得目的产物5-甲氧基-4-甲基-2,4-二氢-3H-1,2,4-三唑-3-酮(MMT)。分别考察了催化剂对1,3-二甲基硫代亚胺二羟酸酯,缚酸剂对5-甲氧基-2,4-二氢-3H-1,2,4-三唑-3-酮和pH值对5-甲氧基-4-甲基2,4-二氢-3H-1,2,4-三唑-3-酮收率的影响。产物总收率55.61%。