Regeneration of 2-amino-2-methyl-1-propanol used for carbon dioxide absorption

To improve the efficiency of the carbon dioxide cycling process and to reduce the regeneration energy consumption, a sterically hindered amine of 2-amino-2-methyl-1- propranol （AMP） was investigated to determine its regeneration behavior as a CO2 absorbent. The CO2 absorption and amine regeneration characteristics were experimentally examined under various operating conditions. The regeneration efficiency increased from 86.2% to 98.3% during the temperature range of 358 to 403 K. The most suitable regeneration temperature for AMP was 383 K, in this experiment condition, and the regeneration efficiency of absorption/regeneration runs descended from 98.3% to 94.0%. A number of heat-stable salts （HSS） could cause a reduction in CO2 absorption capacity and regeneration efficiency. The results indicated that aqueous AMP was easier to regenerate with less loss of absorption capacity than other amines, such as, monoethanolamine （MEA）, diethanolamine （DEA）, diethylenetriamine （DETA）, and N-methyldiethanolamine （MDEA）.

Investigation of liquid–liquid equilibrium of the ternary system(water +1,6-diaminohexane + 2-methyl-1-propanol or 3-methyl-1-butanol) at different temperatures

In this study, the LLE data of ternary system(water + 1,6-diaminohexane + 2-methyl-1-propanol) and(water +1,6-diaminohexane + 3-methyl-1-butanol) were measured at 293.15, 303.15 and 313.15 K under atmospheric pressure. Reliability of the experimental tie-line data was checked by empirical Hand, Othmer-Tobias and Bachman equations. Distribution coefficient(D) and selectivity(S) were calculated in order to investigate capability of the studied organic solvents for 1,6-diaminohexane extraction. The high values of separation factors demonstrated that 2-methyl-1-propanol and 3-methyl-1-butanol were applicable for this purpose. The experimental data were correlated by nonrandom two-liquid(NRTL) and universal quasi-chemical(UNIQUAC) models.The percent-root-mean-square deviation(RMSD) values for NRTL and UNIQUAC models were less than 0.15,which indicated that the experimental data have been sufficiently correlated.

Synthesis and Structural Characterization of a Tetranuclear Copper Complex with 2-Amino-1,3-thiazole

The title tetranuclear complex,（μ4-oxo）-hexakis（μ2-chloro）-tetrakis（2-amino-1,3-thiazole-N）-tetra-copper（ii） [Cu4（μ4-O）（μ-Cl）6L4]（1,L=2-amino-1,3-thiazole） was synthesized by the reaction of CuCl2·2H2O with 2-amino-1,3-thiazole in methanol and characterized by IR spectra and X-ray diffraction.Complex 1 crystallizes in triclinic,space group P1 with a=9.7137（2）,b=10.7005（2）,c=14.6505（2）,α=83.9550（10）,β=82.0930（10）,γ=67.1640（10）°,V=1387.84（4）3,Mr=883.43,Z=2,μ=3.927 mm-1,Dc=2.1144 g/cm3,F（000）=868,R=0.0332 and wR=0.0814.The complex contains a tetrahedron of four CuII atoms coordinating to a central μ4-O atom,with the six edges of the tetrahedron bridged by six Cl atoms.The Cu-O bond distances range from 1.910（2） to 1.918（2）,Cu-Cl from 2.3501（11） to 2.5924（10）,and Cu-Cu from 3.1003（6） to 3.1663（6）.The coordination geometries of the four coppers distort from trigonal bipramid to tetragonal pyramid with different distortion factors.The free animo groups of the ligands result in a lot of N-H···Cl and N-H···N intra-and intermolecular hydrogen bonds.

Synthesis,Crystal Structure and Plant Growth Regulatory Activity of 1-(3-Amino-[1,2,4]triazol-1-yl)-3,3-dimethyl-butan-2-one

The title compound 1-（3-amino-[1,2,4]triazol-1-yl）-3,3-dimethyl-butan-2-one（3） was synthesized by Hofmann-alkylation reaction of 1-chloro-3,3-dimethyl-butan-2-one（1） and ~1H-[1,2,4]triazol-3-ylamine（2） with equal amount of K_2CO_3 as acid acceptor. The structure of compound 3 was characterized by ~1H NMR, 13 C NMR, HRMS and single-crystal X-ray diffraction. The compound crystallizes in the monoclinic system, space group P21/n with a = 5.7227（8）, b = 27.924（4）, c = 6.2282（7） ？, β = 101.892（11）°, V = 973.9（2） ？~3, Z = 4, T = 180.00（10） K, μ（MoKα） = 0.087 mm^（-1）, Dc = 1.243 g/cm^3, 3832 reflections measured（3.648≤θ≤26.022°）, 1916 unique reflections（Rint = 0.0359, Rsigma = 0.0572） used in all calculations. The final R = 0.0557（I 〉 2σ（I）） and w R = 0.1276（all data）. Bioassay showed that 3 displayed excellent activity as plant growth regulator with inducing lateral root formation and enhancing primary root elongation at 0.27 mmol/L（50 ppm） in soybeen（He Feng-50）. Good water solubility was found with 50 mg in 1 m L of water. Therefore, application of 3 in agriculture is more environmentally friendly due to cosolvent-free condition, and results in improved abiotic-stress tolerance by affecting the root growth. And furthermore, it can be used as a precursor to investigate the function of regulating plant root growth.

Syntheses and Characterization of Two New Alkaline Earth Metal-organic Topological Frameworks with 3-Amino-1H-1,2,4-triazole-5-carboxylate

Two new alkaline earth metal coordination polymers constructed from the deriva-tive of 1,2,4-triazole are presented herein,namely,{[Sr（AmTAZAc）2（H2O）]}（1） and {[Ba（AmTAZAc）2（H2O）]}（2）（AmTAZAc = 3-amino-1H-1,2,4-triazole-5-carboxylate）,which have been synthesized by using the layering method and structurally characterized by elemental analysis,IR,and single-crystal X-ray diffraction.Complexes 1 and 2 are isostructural,and both crystallize in the orthorhombic system,space group Fdd2.X-ray structural analysis shows that 1 or 2 has an intriguing 3-D infinite network of（318.438.510） topology based on a 2-D sheet structure of（4,4） net.The result shows that noncovalent interactions play an important role in strengthening the whole structures of the compounds.

2,5-二[(3-羟丙基)氨基]-1,4-苯醌的合成

以对苯二酚和3-羟基丙胺为原料,甲醇为溶剂合成2,5-二[(3-羟丙基)氨基]-1,4-苯醌。对反应产物进行了红外、紫外和质谱等表征。通过实验,得出优化的反应条件:苯二酚和3-羟基丙胺的物质的量比为1∶5,反应时间为4 h,反应温度为50℃,产品的产率为54.26%。

从头算研究3-氨基-1-丙醇的电离能

采用MP2／6—311＋＋G＊＊方法研究了3-氨基-11-丙醇势能面上能量最低的14种构象．运用B3LYP，MP3和MP4计算了构象的相对能量，结果说明含有分子内OH．．．N氢键的两种构象最稳定．电子传播子理论P3／aug—CC—pVTz近似方法计算了构象的电离能，与光电子能谱的实验数据符合较好．运用自然键轨道理论解释了构象间最外价壳层轨道电离能的筹异．结合统计力学原理，计算了不同温度下的构象分布，解释了光电子能谱依赖温度的原因。

1-(9H-咔唑-4-氧)-3-取代氨基-2-丙醇类化合物的合成及生物活性(Ⅰ)

目的 :寻找有 β-受体阻滞活性 ,且高效低毒的化合物。方法 :以 β-受体阻滞剂咔唑洛尔为先导化合物 ,根据药物设计中的结构拼合原理 ,对其丙醇胺侧链进行结构修饰 ,设计并合成了 1 0个 1 -( 9H-咔唑 -4 -氧 ) -3-取代氨基 -2 -丙醇类化合物 1 ～ 1 0 。结果和结论 :所合成的目的物均未见文献报道 ,结构经红外光谱、核磁共振氢谱、质谱、元素分析或高分辨质谱确证。初步药理筛选结果显示 ,1 0个化合物均能够不同程度地拮抗异丙肾上腺素引起的心动过速 ,其中化合物 1 、 3 、 4 的活性与先导化合物相似。

1-(9H-咔唑-4-氧)-3-取代氨基-2-丙醇类化合物的合成及生物活性(Ⅱ)

目的 寻找有 β-受体阻滞活性 ,且高效低毒的化合物。方法 以 β-受体阻滞剂咔唑洛尔为先导化合物 ,根据药物设计中的结构拼合原理 ,对其丙醇胺侧链进行结构修饰 ,设计并合成了 3个 1- ( 9H-咔唑 - 4-氧 ) - 3 -取代氨基 -2 -丙醇类化合物 V1 1 ～ V1 3及其 6个相应的酯化物 VI1 ～VI6 。结果和讨论 所合成的目的物均未见文献报道 ,结构经红外光谱、核磁共振氢谱、质谱、元素分析或高分辨质谱确证。初步药理筛选结果显示 ,9个化合物均能够不同程度地拮抗异丙肾上腺素引起的心动过速 ,其中化合物 1 2 、 3、

1,1-二甲基-3-甲硫基乙胺的合成

1,1-二甲基-3-甲硫基乙胺是合成新型杀虫剂氟虫双酰胺的关键中间体。比较了1,1-二甲基-3-甲硫基乙胺的各种合成方法,探索了一条工艺路线以2-氨基-2-甲基-1-丙醇为原料,经硫酸酯化,再与甲硫醇钠反应,合成得到标题化合物。考察了硫酸浓度、物料配比,加料方式等因素对反应的影响,总收率83.0%,含量95.0%以上。

UPLC-MS/MS法测定利奈唑胺及其中间体(S)-N-(2-乙酰氧基-3-氯丙基)乙酰胺中的遗传毒性杂质(S)-1-氨基-3-氯-2-丙醇

目的建立液质联用色谱法(UPLC-MS/MS)同时测定利奈唑胺及其中间体(S)-N-(2-乙酰氧基-3-氯丙基)乙酰胺中的基因毒性杂质(S)-1-氨基-3-氯-2-丙醇。方法采用Agilent Poroshell 120 EC-C_(18)色谱柱,流动相为0.1%甲酸水溶液-0.1%甲酸甲醇溶液(梯度洗脱),流速为0.3 mL·min^(-1),柱温为35℃,进样量为2μL,电喷雾离子源,正离子模式,多反应监测模式(MRM)测定,定量离子对为质荷比(m/z)110.0→91.9,定性离子对为质荷比(m/z)110.0→56.1。结果(S)-1-氨基-3-氯-2-丙醇在0.836~208.989 ng·mL^(-1)范围内线性关系良好(r=0.9996),检测限为0.279 ng·mL^(-1),定量限为0.774 ng·mL^(-1),利奈唑胺中该杂质平均加样回收率在96.6%~97.6%(RSD<2%),中间体中该杂质平均加样回收率在101.6%~105.6%(RSD<2%)。3批利奈唑胺中均未检出该杂质,3批中间体中该杂质含量均小于0.05%。结论本法灵敏、可靠,可用于利奈唑胺及其起始原料(S)-N-(2-乙酰氧基-3-氯丙基)乙酰胺中基因毒性杂质(S)-1-氨基-3-氯-2-丙醇的测定。

Synthesis, Crystal Structure, Antibacterial Activities and Theoretical Computation of 3-(2-Hydroxybenzly)-4-(4-isopropylbenzyl- ideneamino)-(1H)-1,2,4-triazole-5-thione

The title compound C18H18N4OS has been synthesized by the reaction of 3-（2-hydroxy- benzyl）-4-amino-（1H）-1,2,4-triazole-5-thione with 4-isopropylbenzaldehyde in ethanol and characterized by IR, ^1H NMR spectra and elemental analysis. Its structure was determined by X-ray diffraction analysis. The crystal belongs to monoclinic, space group P21/c with a = 11.605（2）, b = 7.401（1）, c = 20.339（2） A, β= 103.05（2）°, V= 1701.8（4） A^3, Z = 4, Mr = 338.42,μ = 0.202 mm^-1, Dc = 1.321 g/cm^3 and F（000） = 712. The structure was solved by direct methods and refined to R = 0.0428 and wR = 0.1069. Due to the intramolecular O-H…N hydrogen bond and π-π stacking interactions between the benzene （C（1）～C（6）） and triazole rings, the two planes are essentially coplanar. Their biological activities have been measured, showing this type of compound has certain antibacterial activity for Staphylococous aureus and Bacillus subtilis. Based on the quantum chemistry calculation at the RHF/6-31G level, the frontier orbitals and electrostatic potential of the title compound were also discussed.

Syntheses of Coordination Compounds of 2-Amino-3-Methylbutanoic Acid Their Mixed Ligand Complexes and Antibacterial Activities

Coordination compounds of 2-amino-3-methylbutanoic acid were synthesized with chromium(III) and oxovanadium(IV) ions. M:L;1:2. Adducts of these complexes using 1,10-phenantroline and ethylenediamine were further synthesized, M:L, (1:2). These compounds were characterized using electronic, infra-red spectrophotometry, magnetic susceptibility measurement and percentage metal analyses. The zones of inhibition and minimum inhibitory concentrations of the compounds against eight microbes were studied. The results obtained indicated an octahedral geometry for the Cr(III) complexes, indicative of additional coordination of two water molecules. On the other hand a square pyramid geometry was obtained for the binary oxovanadium complex and its 1,10-phenantroline adduct. However, for the oxovanadium ethylenediamine adduct a distorted octahedral geometry was proposed. The result for the antibacterial studies indicated that both mixed ligand complexes of 1,10-phenantroline exhibited good antibacterial activity, and in some cases better activity than the standard, streptomycin.

3-甲基-5-苄基-2-芳基-2-吗啉醇盐酸盐的合成及生物活性

目的:合成并筛选新的抗抑郁活性化合物。方法:以间氯苯丙酮、苯丙酮、6-甲氧基-2-丙酰萘为起始化合物,经溴化反应合成2-溴-3-氯苯丙酮,2-溴苯丙酮,6-甲氧基-2-(2-溴丙酰基)萘,然后分别与外消旋化合物3-苯基-2-氨基-1-丙醇反应得到目标化合物。参照Porsolt法小鼠强迫游泳药理实验模型对所合成的化合物进行了初步抗实验性抑郁活性研究。结果:合成了目标化合物,目标化合物结构经IR,~1HNMR,MS确证。口服剂量为50 mg·kg^(-1)化合物4a的小鼠组强迫游泳静止时间显著低于空白对照组(P＜0．01)。结论:本合成方法反应时间短,溶剂无毒性,收率较理想。化合物4a显示良好的抗实验性抑郁活性,值得进一步研究。

Auxiliary Ligands Mediated One- and Two-dimensional Cd(Ⅱ) Coordination Polymers Incorporating Methyl-3- hydroxy-5-carboxy-2-Thiophenecarboxylate Ligand

Two N-donor ligands mediated Cd（Ⅱ） coordination polymers, namely,[Cd（L）（dmpz）2]n （1） and {[Cd（L）（atr）05（H20）]（H2O）}n （2） （H2L = methyl-3-hydroxy-5-carboxy-2-thiophenecarboxylate, dmpz = 3,5-dimethylpyrazole, and atr= 4-amino-l,2,4-triazole）, havebeen produced. Their structures were characterized by single-crystal X-ray diffraction analysis,elemental analyses and infrared spectra. Compound 1 possesses a one-dimensional （1D） chainstructure and is finally extended into a three-dimensional （3D） supramolecular architecturethough hydrogen bonding interactions. Compound 2 features a two-dimensional （2D） networkwith 4-connected sql topology based on dinuclear Cd（Ⅱ） clusters as nodes, which is alsoassembled into a 3D supramolecular architecture through hydrogen bonding interactions.Furthermore, compounds 1 and 2 exhibit high thermal stabilities and intense fluorescent emissionin the solid, and can be explored as potential luminescent materials.

Methylation of 5-Amino-3-methylthio-1 H-pyrazole Derivatives and Two Related Crystal Structures

5-Amino-3-methylthio-1H-pyrazoles are very important building blocks from which a wide variety of pyrazole de-rivatives can be prepared. When substituted 5-amino-3-methylthio-1H-pyrazole was treated with CH3I, the methy-lation occurres at endocyclic two nitrogens at the same time. The ratio of isomers in products was depended upon the nature of 4-position substituent in the pyrazole ring. The products were characterized by X-ray diffraction analysis, and the ratios of isomer were explained by means of the results of ab inito calculation.

Studies on 3-Amino-4-(1H-tetrazol-5-yl)-furazan:Crystal Structure, Thermal Behavior and Energetic Performance

The structure of 4-amino-3-(5-tetrazolate)-fiirazan(HAFT) was characterized by single crystal X-ray diffraction. The thermal decomposition process of HAFT was investigated by MS-FTIR-DSC-TG coupling technique. The result shows that the exothermic process occurs from 278.7-350℃, with a peak temperature of 324.7℃. The thennal decomposition gaseous products of HAFT are NO2, CO2, HCN, CO, NH3 and H2O. The detonation velocity and detonation pressure of HAFT were calculated by the nitrogen equivalent equation. The detonation velocity of HAFT is 7727.46 m/s, which is higher than that of TNT(7178 m/s). The detonation pressure of HAFT(25.27 GPa) is satisfactory. The sensitivity tests reveal HAFT possesses excellent insensitivities to impact and friction.

Improvement in the synthesis of 2-(5-amino-1,2,4-thiadiazol-3- yl)-2-(Z)-methoxyiminoacetic acid 2-benzothiazolyl thioester

2-(5-Amino-1,2,4-thiadiazol-3-yl)-2-(Z)-meth-oxyiminoacetic acid 2-benzothiazolyl thioester(III),an important intermediate of the fourth generation cephalos-porins,was efficiently synthesized by reacting 2-(5-amino-1,2,4-thiadiazol-3-yl)-2-(Z)-methoxyiminoacetic acid(I)with 2,29-dibenzothiazole disulfide(II)in the presence of triphenylphosphine.Effects of reaction time,temperature,solvents,catalysts and feeding molar ratio on the yield and quality of products were investigated,and an im-proved procedure suitable for industrial production was established.Using 1,2-dichloroethane as solvent,triphe-nylphosphine as reducer,and triethylamine as catalyst,n(I):n(II):n(triphenylphosphine)51.0:1.0:1.0,the product was obtained at room temperature in 98.1%yield.The purity of the product without further purification is 98.7%determined by HPLC method.This procedure could be a suitable alternative to the traditional processes because of its easy handling,high yield and low cost.

Copper(Ⅱ)-Catalyzed Synthesis of N-Substituted-3-amino-4- cyano-isoquinoline-1(2H)-ones by the Reaction of N-Substituted-2-iodobenzamides with Malononitrile

A novel Cu(OAc)_(2)•H_(2)O catalyzed coupling reaction of N-substituted-2-iodobenzamides with malononitrile to afford N-substituted-3-amino-4-cyano-isoquinoline-1(2H)-ones is described.The reaction proceeded in DMSO at 90℃ for 5 h in nitrogen without external ligands.