2-羟基-3-甲氧基苯甲醛与α-萘胺Schiff碱硝酸稀土配合物的合成与表征

合成邻香兰素(2-羟基-3-甲氧基苯甲醛)与α-萘胺Schiff碱硝酸稀土配合物[LnL~2(NO~3)~2]NO~3(Ln: 镧系元素, L: Schiff碱配体)。配合物由一个中心稀土离子, 两个Schiff碱和三个硝酸根组成, 两个Schiff碱都是氮、氧双配位, 两个硝酸根是双齿配位, 另一硝酸根在配合物外界。中心稀土离子是八配位的, 满足稀土八配位的稳定结构。     

N,N′-双(2-羟基-3-甲氧基-5-甲基苯甲叉基)乙二胺合钴(Ⅱ)类似物的合成及其对氧分子的加合性能

2-羟基-3-甲氧基-5-甲基苯甲醛分别与乙二胺、1,2-丙二胺、1,3-丙二胺、2,3-二甲基-2,3-丁二胺及邻苯二胺反应,合成出一系列二元Schiff碱型化合物.测定Schiff碱与钴(Ⅱ)离子配合后的配合物对氧分子的加合常数,讨论了结构与加合性能之间的关系.配合物中二胺-钴螯合环的刚性对配合物的氧加合性有重要影响.     

2-羟基-3-甲氧基苯甲醛与α-萘胺Schiff碱硝酸稀土配合物的合成与表征

合成邻香兰素(2-羟基-3-甲氧基苯甲醛)与α-萘胺Schiff碱硝酸稀土配合物[LnL_2(NO_3)_2NO_3(Ln:镧系元素,L:Schiff碱配体)。配合物由一个中心稀土离子,两个Schiff碱和三个硝酸根组成,两个Schiff碱都是氮、氧双配位,两个硝酸根是双齿配位,另一硝酸根在配合物外界。中心稀土离子是八配位的,满足稀土八配位的稳定结构。     

2-氨基-5-(4-吡啶基)-1, 3, 4-噻二唑Schiff碱的合成及其生物活性

2-氨基-5-(4-吡啶基)-1;3;4-噻二唑Schiff碱的合成及其生物活性;噻二唑;Schiff碱;合成;生长素;细胞分裂素     

片螺素中间体——2,4,5-三甲氧基-α-卤代苯乙酮的合成研究

片螺素[1](Lamel larin)及其类似生物碱是近年来自海洋生物中分离得到的一种海洋活性物质,迄今为止发现有39种[1][2]。所有的片螺素都具有一定的生物活性[3]。但由于海洋生物中片螺素具有含量低,分离困难等特点,因而其合成研究是十分有意义的。本课题组在国家自然基金资助下,设     

5-甲氧基吲哚的合成

5-甲氧基吲哚是重要的有机合成中间体 ,可用于合成吲哚类衍生物 ,如 5-甲氧基色胺和松果腺素等[1,2 ] 。经典的 Reissert法[3] 以 2 -甲基 -4-甲氧基硝基苯与草酸二乙酯经缩合、还原、脱羧而得 ,该路线最后一步脱羧所需温度过高、易炭化导致收率低而难以工业化 ;Kita等[4 ] 以三甲硅基乙氧基甲酰 ( TEOC)将 2 -氨乙基 -4-甲氧基苯酚中的氨基保护后 ,在乙腈 -甲醇溶液中以高价碘试剂 PIFA( phenyliodinebistrifluoroacetate)催化氧化得醌式亚氨的缩醛化合物 ,分子内成环时去掉保护基团 TEOC,再以 1 0 %Pd/ C处理而得 5-甲氧基吲哚 ,该…     

1-(3-芳亚甲基氨基)丙基-2,8,9-三氧杂-5-氮杂-1-硅杂双环[3,3,3]十一烷金属络合物的合成及其抗肿瘤活性研究

我们曾对1-亚甲基氨基烷基-2,8,9-三氧杂-5-氮杂-1-硅杂双环[3,3,3]十一烷的合成及其抗肿瘤活性作过研究,发现1-[3-(2-羟基苯亚甲基氨基)丙基]-2,8,9-三氧杂-5-氮杂-1-硅杂双环[3,3,3]十一烷和1-[3-(2,4-二羟基苯亚甲基氨基)丙基]-2,8,9-三氧杂-5-氮杂-1-硅杂双环[3,3,3]十一烷具有较好的抗肿瘤活性。已知亚甲胺类(Schiff碱)化合物与某些金属离子形成络合物后,能提高它们的抗肿瘤活性。为此,我们进一步研究了这两种亚甲胺衍生物的合成及其抗肿瘤活性。     

(±)-3,5-二羟基-7,4′-二甲氧基二氢黄酮醇和(±)-3,5,7-三羟基-4′-甲氧基二氢黄酮醇的全合成

3,5-二羟基-7,4′-二甲氧基二氢黄酮醇(1)从Cephalanthus spathelliferus中分离得到后[1], 又在Haplopappus bayahuen[2]和Lannea coromandelica[3]等植物中被发现, 在印度一直被用于治疗象皮病、阳痿、溃疡、阴道炎、口臭、痢疾和风湿病等. 3,5,7-三羟基-4′-甲氧基二氢黄酮醇(2)首次从Prunus donestica[4]中分离出来后, 又从Salix caprea L., Brazilian propolis中得到. 研究表明, 该化合物具有抗菌、抗肿瘤活性. 我们用与文献[5]类似的方法以2, 4, 6-三羟基苯乙酮和茴香醛为起始原料, 经选择性保护、缩合、环氧化、关环首次完成了化合物(±)-1和(±)-2的全合成. 合成路线如下:     

三氮唑类席夫碱的合成及其荧光性能

近年来,Schiff碱因其结构的多样化以及具有光、电、磁等物理材料性能[1-3]的配位化学性能[4-5]等引起人们的关注,同时一些特殊结构的Schiff碱的合成和性质研究具有更为重要的理论意义和应用价值.     

1-甲基-2-咪唑醛缩甘氨酸Schiff碱配合物的合成与抑菌活性

以1-甲基-2-咪唑醛和甘氨酸缩合的Schiff碱为配体,合成了4种新的过渡金属配合物[M(C7N3H8O2)(H2O)n]Cl O4(M=Co,Ni,Cu,Zn).经元素分析、摩尔电导率测定、红外光谱、电子光谱和热重分析确证配合物的组成和结构.初步抑菌活性实验表明,合成的配合物对多种菌株有明显的抑菌活性.     

双核Pt(Ⅳ)配合物与Guanosine-5''''-Monophosphate和Glutathione反应的核磁共振光谱研究

合成了一个新型的双核Pt(Ⅳ)配合物{[cis-Pt(NH3)2Cl(OH)2]2(4,4'-methylenedianiline)}(NO3)2(化合物1)及相应的 15N标记化合物{[cis-Pt(15NH3)2Cl(OH)2]2(4,4'-methylenedianiline)}(NO3)2(化合物15N-1).利用1H NMR和ESMS进行了结构表征,化合物15N-1的2D[1H,15N]HSQC NMR发现,该化合物在水溶液中存在同分异构体.2D[1H,15N]HSQC NMR技术跟踪了化合物15N-1与Guanosine-5'-Monophosphate(5'-GMP)和Glutathione(GSH)的反应.结果显示,5'-GMP能在0.5 h内将化合物1还原,而GSH在6 h以后才能够部分的将化合物1还原.化合物1所表现出来的反应性能将有利于提高其治疗效果和降低毒副作用.     

Preparation of a carbon-based solid acid catalyst by sulfonating activated carbon in a chemical reduction process

Sulfonated (SO(3)H-bearing) activated carbon (AC-SO(3)H) was synthesized by an aryl diazonium salt reduction process. The obtained material had a SO(3)H density of 0.64 mmol·g-1 and a specific surface area of 602 m2·g-1. The catalytic properties of AC-SO(3)H were compared with that of two commercial solid acid catalysts, Nafion NR50 and Amberlyst-15. In a 10-h esterification reaction of acetic acid with ethanol, the acid conversion with AC-SO(3)H (78%) was lower than that of Amberlyst-15 (86%), which could be attributed to the fact that the SO(3)H density of the sulfonated carbon was lower than that of Amberlyst-15 (4.60 mmol·g-1). However, AC-SO(3)H exhibited comparable and even much higher catalytic activities than the commercial catalysts in the esterification of aliphatic acids with longer carbon chains such as hexanoic acid and decanoic acid, which may be due to the large specific surface area and mesoporous structures of the activated carbon. The disadvantage of AC-SO(3)H is the leaching of SO(3)H group during the reactions.     

Dinitrogen formation by oxidative intramolecular N---N coupling in cis,cis-[(bpy)2(NH3)RuORu(NH3)(bpy)2]4+

The (15)N-labeled diammine(mu-oxo)ruthenium complex cis,cis-[(bpy)(2)(H(3)(15)N)Ru(III)ORu(III)((15)NH(3))(bpy)(2)](4+) ((2-(15)N)(4+)) was synthesized from cis,cis-[(bpy)(2)(H(2)O)Ru(III)ORu(III)(H(2)O)(bpy)(2)](4+) by using ((15)NH(4))(2)SO(4) and isolated as its perchlorate salt in 17% yield. A 1:1 mixture of (2-(15)N)(4+) and nonlabeled cis,cis-[(bpy)(2)(H(3)(14)N)Ru(III)ORu(III)((14)NH(3))(bpy)(2)](4+) were electrochemically oxidized in aqueous solution. The gaseous products (14)N(2) and (15)N(2) were formed in equimolar amounts with only a small amount of (14)N(15)N detected. This demonstrates that dinitrogen formation by oxidation of the diammine complex proceeds by intramolecular N---N coupling.     

青蒿素生物合成的研究II. 前体[15-^2H]-和[15-^3H]-青蒿酸的 化学合成

青蒿酸甲酯(5)用NBS溴化产生的溴化物,经NaBD~3CN或NaBD~4氘解,生成[15-^2H]-青蒿酸甲酯(6),其结构由MS,^1H,^2H和^1^3C的NMR确定。(6)经水解生成[15-^2H]-青蒿酸(4),用同样方法以NaB^3H~4为氘化试剂与溴化物反应,合成了[15-^3H]-青蒿酸(1)。     

Effect of aluminum modification on catalytic properties of PtSn-based catalysts supported on SBA-15 for propane dehydrogenation

The catalytic properties of PtSn-based catalysts supported on siliceous SBA-15 and Al-modified SBA-15, such as Al-incorporated SBA-15 (AlSBA-15) and alumina-modified SBA-15 (Al2O3/SBA-15), for propane dehydrogenation were investigated. Al2O3/SBA-15 was prepared either by an impregnation method using aluminum nitrate aqueous solution, or by the treatment of SBA-15 with a Al(OC3H7)3 solution in anhydrous toluene. N2-physisorption, FT-IR spectroscopy, solid-state 27Al MAS NMR spectroscopy, hydrogen chemisorption, XRF, NH3 temperature-programmed desorption, X-ray photoelectron spectroscopy and TPO were used to characterize these samples. Among these catalysts, the PtSn-based catalyst supported on Al2O3/SBA-15, which was grafted with Al(OC3H7)3, exhibited the best catalytic performance in terms of activity and stability The possible reason was due to the high Pt metal dispersion and/or the strong interactions among Pt, Sn, and the support.     

三水硝酸镝与苯并-15-冠-5在丙酮中配合行为的研究

本文为进一步弄清Dy(NO3)3.3H2O与B15C5在丙酮中的配合行为, 作者用改进的半微量相平衡方法, 研究了Dy(NO3)3.3H2O-B15C5-CH3COCH3三元体系在18℃时的溶解度, 并进一步分离制备配合物, 研究了配合物的红外光谱, 热力学等性质.     

Influence of dT20 and [d(AT)10]2 on cisplatin hydrolysis studied by two-dimensional [1H,15N] HMQC NMR spectroscopy

The influence of the presence of DNA on the kinetics of cisplatin (cis-[PtCl2(NH3)2]) aquation (replacement of Cl- by H2O) and anation (replacement of H2O by Cl-) involved in the hydrolysis of cisplatin have been determined by two-dimensional [1H,15N] HMQC NMR spectroscopy. Single-stranded dT20 and double-stranded [d(AT)10]2 oligonucleotides were used as DNA models, avoiding guanines which are known to react rapidly with aquated cisplatin forms. Reactions starting from cis-[PtCl2(15NH3)2], or from a stoichiometric mixture of cis-[Pt(15NH3)2(H2O)2]2+ and Cl- (all 0.5 mM Pt(II); in ionic strength, adjusted to 0.095 M or 0.011 M with NaClO4, pH between 3.0 and 4.0) were followed in an NMR tube in both the absence and presence of 0.7 mM dT20 or [d(AT)10]2. In the presence of dT20, we observed a slight and ionic-strength-independent decrease (15-20 %) of the first aquation rate constant, and a more significant decrease of the second anation rate constant. The latter was more important at low ionic strength, and can be explained by efficient condensation of cis-[Pt(15NH3)2(H2O)2]2+ on the surface of single-stranded DNA, in a region depleted of chloride anions. At low ionic strength, we observed an additional set of [1H,15N] HMQC spectral signals indicative of an asymmetric species of PtN2O2 coordination, and we assigned them to phosphate-bound monoadducts of cis-[Pt(15NH3)2(H2O)2]2+. Double-stranded [d(AT)10]2 slowed down the first aquation step also by approximately 15 %; however, we could not determine the influence on the second hydrolysis step because of a significant background reaction with cis-[Pt(NH3)2(H2O)2]2+.     

脂肪酸铕配合物聚合物材料的合成及发光性质

以一定比例正辛酸和月桂酸为第一配体,通过皂化法合成了脂肪酸铕配合物,并溶于甲基丙烯酸甲酯（MMA）单体通过本体聚合得到了含脂肪酸铕的PMMA光致发光聚合物材料AxByEu/PMMA（其中A=正辛酸根,B=月桂酸根,x、y分别表示正辛酸和月桂酸的比例）。考察了不同的第二配体（咔唑、二甲基-联吡啶、邻菲罗啉、噻吩甲酰三氟丙酮HTTA）对脂肪酸铕聚合物发光性能的影响,选择出合适的第二配体HTTA,进而合成了A3Eu/HTTA/PMMA聚合物。通过红外光谱、紫外光谱及荧光光谱对脂肪酸铕配合物及聚合物的结构和荧光性能进行表征。结果表明：合成的脂肪酸铕配合物及其聚合物均具有很好的光致发光性能,紫外激发能发射Eu3+离子的特征红光。当HTTA的质量分数减小至0.02%时,仍能很好地促进体系的发光,且不影响聚合物本身的透明性。     

Stereochemistry of the cyclization-rearrangement of (+)-copalyl diphosphate to (-)-abietadiene catalyzed by recombinant abietadiene synthase from Abies grandis

[reaction: see text] Syntheses and enzymatic cyclizations of 8alpha-hydroxy-17-nor copalyl diphosphate (8a), (15R)-[15-2H1] 8b, and (15R,17E)-[15-3H1,17-2H1] copalyl diphosphate ([2H,3H] 2) catalyzed by recombinant abietadiene synthase (rAS) gave 17-nor manoyl oxide (9a), (16E)-[16-2H1] 9b, and (15S,16R)-[16-2H1,16-3H1] abietadiene ([2H1,3H1] 4), respectively. These and other results indicate that conversion of CPP (2) to abietadiene (4) occurs by anti S(N)' cyclization to a sandaracopimar-15-en-8-yl carbocation intermediate (13+, 13beta-methyl) followed by hydrogen transfer and methyl migration suprafacially on the si face of the vinyl group.     

烯土硝酸盐冠醚配合物Y(NO3)3 3H2O-B15C5-CH3CN三元体系18`C时溶解度的研究

A semimicro method has been used to study the solubilities of the ternary system, Y(NO3)3.3H2O-B15C5-CH3CN, at 18C. The results indicated that there is only one complex formed in this system. The stable complex has been isolated and its composition was determined by chemical analysis to be Y(NO3)3.B15C5.3H2O and the dehydration behavior of the complex was studied using DTA and TG methods.