Preparation of phthalocyanines with eight benzylchalcogeno substituents from 5,6-dibromo-4,7-diethylbenzo[1,2,3]trichalcogenoles

Benzo[1,2,3]trichalcogenoles with two bromine atoms on the benzene ring, 5,6-dibromo-4,7-diethylbenzo[1,2,3]trichalcogenoles (1a) and (1b) (chalcogen: 1a = S; 1b = Se), were first prepared by treating 2,3,5,6-tetrabromo-1,4-diethylbenzene (TBDEB) with elemental sulfur or amorphous selenium in DBU at 140 degrees C (for 1a) and 100 degrees C (for 1b) for 24 h. The structures of 1a and 1b were verified by NMR spectroscopy, mass spectrometry, and elemental analysis. X-ray crystallographic analysis ultimately showed that the substitution reactions of TBDEB proceeded at the two adjacent bromine atoms. To apply 1a and 1b to construction of phthalocyanine derivatives with sulfur or selenium functional groups, 4,5-bis(benzylchalcogeno)-3,6-diethylphthalonitriles (5a) and (5b) as key intermediates were prepared by way of introduction of alkyl groups (2-cyanoethyl or 4-nitrophenethyl groups) on two chalcogen atoms, substitution of two bromine atoms with nitrile groups, and subsequent exchange of alkyl groups with benzyl groups. Compound 5a was treated with lithium in n-pentanol at 100 degrees C for 1 h to produce 2,3,9,10,16,17,23,24-octakis(benzylthio)-1,4,8,11,15,18,22,25-octaethylphthalocyanine (6a). A similar treatment of 5b in n-hexanol at 100 degrees C for 2 h gave phthalocyanine 6b. The structures of 6a and 6b were determined by (1)H NMR spectroscopy and MALDI-TOFMS. X-ray crystallographic analysis of 6a was also performed. The Q-band absorptions (lambda(max)) for 6a and 6b in UV-vis spectra were observed at 755 nm (log epsilon = 5.1) and 757 nm (log epsilon = 5.1), respectively, and their electrochemical properties were verified by cyclic voltammetry in dichloromethane with Ag/AgNO(3) as a reference electrode. Compounds 6a and 6b were further treated with lithium in THF/NH(3) at -78 degrees C and then with dibutyltin dichloride to produce phthalocyanine derivatives 8a and 8b with four dichalcogenastannole rings by way of octachalcogenate phthalocyanines 7a and 7b.     

Application of Phase Transfer Catalysis in Heterocyclic Synthesis: Synthesis of Some New Polyfunctional Thiophenes,Thiopyrans, Pyridines and Oxazines

The reaction of compound 1 with CS 2 and different active halo compounds gave the corresponding thiophene derivatives 2a,b-4a,b , whereas treatment of compound 1 with CS 2 and active methylene compounds afforded the corresponding thiopyran derivatives 5a,b , 6a,b , 7 , and 8 . Also, 1,3-thioxane derivatives 9 and 10 were obtained by reacting compound 1 with CS 2 and different cycloalkanones. Thiophene and pyrrolidene derivatives 11 , 12a,b , and 13a,b were obtained by reacting compound 1 with phenyl isothiocyanate and different halo compounds. The active methylene compounds and/or cycloalkanones were treated with compound 1 in the presence of phenyl isothiocyanate to give pyridines, thiopyran and oxazine derivatives 14a,b-16a,b , 17a-19a , and 19b , respectively.     

Synthesis of Calix [4] resorcinarene Core Dendrimers with Peripheral Salicylideneimine Functional Groups

IntroductionOver the past two decades, dendrimers have at-tracted considerable attention because of their inherentnovel structural features and their potential applicationsin various scientific and industrial fields such as cataly-sis or newmaterials, and…     

(硫杂)杯[4]芳烃缩氨基(硫)脲(桥联)衍生物的合成

对叔丁基(硫杂)杯[4]芳烃-1,3-二醛基衍生物4a和4b与苯基氨基硫脲进行“1＋2”缩合反应, 合成了杯[4]芳烃缩氨基硫脲衍生物5a和5b, 产率为84%和85%. 化合物4a和4b与1,6-己基双氨基脲发生“1＋1”缩合反应, 合成了杯[4]芳烃双缩氨基脲桥联衍生物6a和6b, 产率为83%和80%. 新化合物的结构与构象经元素分析、质谱、核磁共振谱等表征证实.     

几种新的4-酰代吡唑啉酮衍生物的合成与结构

利用4-酰代吡唑啉酮与氨基硫脲类化合物反应制备了新的吡唑啉酮类衍生物,并用IR,NMR,MS和元素分析进行表征,最后用X射线四圆衍射对其中的2个化合物进行了晶体结构测定。     

Syntheses of Hitherto Unknown Thiazole,Ylidene and Pyridinethione Derivatives Having a Piperidin‐1‐yl Moiety and Their Use as Antimicrobial Agents

The novel hydrazone derivatives 2a‐c were prepared by treatment of aldehydes 1a,b with some hydrazines. Thiocarbamoyl functional group in compound 2a was subjected to cyclization reactions with some α‐halocarbonyl reagents and furnished the novel thiazoles 4‐6 , 8 and 9 . Enaminonitrile 10 and pyridinone 13 derivatives were synthesized by interaction of active methylene compound 2b with N,N‐dimethylformamide‐dimethylacetal and ketene dithioacetal 11 , respectively. Aliphatic, aromatic and heteroaromatic active methylene compounds were condensed with aldehydes 1a,b to afford the new ylidenes 15a‐d , 19a,b , 20 and 21 . Substituted pyridinethiones 22 and 23 were prepared in high yields by cyclocondensation of 15c with malononitrile and ethyl cyanoacetate, respectively. Indeno[1,2‐b]pyridines 26a,b were obtained by the reaction of ylidenes 19a,b with cyanothioacetamide in ethanol and in the presence of sodium ethoxide under reflux. The structures of the synthesized compounds were established from their analytical and spectral data. The prepared compounds were also screened for their antimicrobial activity.     

6,7-二氧亚甲基-3-氮杂(硫杂)-1(2H,4H)吖啶酮及其衍生物的合成

氮杂吖啶酮;硫杂吖啶酮;杂环化合物;6;7-二氧亚甲基-3-氮杂(硫杂)-1(2H;4H)吖啶酮及其衍生物的合成     

Potassium hydroxylamine complexes

Potassium complexes of N,N-dialkylhydroxylamines [KONR2, R=Me (1a), iPr (2a), CH2C6H5] were synthesized by the deprotonation of the corresponding N, N-dialkylhydroxylamines with KH. 1a and 1b [(KONMe2)(HONMe2)] dissolve in THF under the addition of an additional equiv of the parent hydroxylamine to give 1b and [(KONiPr2)(HONiPr2)(THF)] 2b. 1b, 2b and [(KONBn2)6(THF)4] (3) were characterized by NMR and IR spectroscopy, by elemental analyses, and by X-ray diffraction of single crystals. 1b and 2b crystallize as polymers, whereby compound 1b with smaller groups leads to higher coordination numbers at the potassium atoms (CN=7) and double-stranded more complex ladder-type aggregates, whereas 2b with the larger iPr groups contains potassium atoms with a coordination number of 5 and is a single-stranded polymer. The compound {[KON(CH2C6H5)2]6(THF)4} (3) exists in a hexameric bis-cubane-based form in the solid state. Quantum chemical calculations were undertaken to examine the nature of the hydrogen bonding in the (R2NO...H...ONR2) units of 1b and 2b, which is asymmetric in the first and symmetric in the second case.     

高效合成氯代苯醌基碳糖苷

报道一种简便、高效的氯代苯醌碳糖苷3a (3b)的合成新方法: 以苯醌基碳苷1a (1b)为原料, 经CH3COCl/THF/H2O体系进行加成反应, 高区域选择性获得糖基间位氯代的氢醌基碳苷2a (2b), 继而通过硝酸铈铵(CAN)氧化得到目标结构3a (3b), 并对所合成的化合物进行了结构表征.     

新的偶氮酚型和酚兰型生色开链冠醚的合成和配位性质

用酚型开链冠醚1a和1b为原料, 在碱溶液中合成了两类生色开链冠醚: 一类是与对硝基苯重氮氟硼酸盐反应生成的偶氮酚型(2b和2b); 另一类是与N, N-二甲基对苯二胺和K~3[Fe(CN)~6]反应生成的酚兰型(3a和3b)。用紫外-可见光谱法研究了这些生色开链冠醚与碱金属和碱土金属离子的配位性质。发现在THF-H~2O中, 2a对LiClO~4和Ca(ClO~4)~2, 2b对LiClO~4、NaClO~4和Ca(ClO~4)~2, 有较显著的选择性变色作用; 而3a和3b在CH~3CN中, 则对LiClO~4、NaClO~4和各种碱土金属盐,均有不同程度的变色作用, 尤其以对Ca^2^+和Sr^2^+作用时的△λ~m~a~x为最大。这些结果表明, 2a和2b的配位性质分别与由邻苯二酚衍生的2'a和2'b相似, 而3a和3b的配位性质则分别与由邻苯二酚衍生的3'b相似。     

硫代米氏酮与1-取代-1, 3-丁二烯的环加成反应

研究了硫代米代酮与反-1-苯基-1, 3-丁二烯(2a), 反-2, 4-戊二烯酸甲酯(2b), 反-1, 3-戊二烯(2c)的环加成反应, 硫酮与这些双烯在50-70℃下反应, 反应的区域选择性为生成的主要加成物位阻较小, 并用前线分子轨道理论及立体化学进行了解释。     

Synthesis and properties of hexakis(6-octyl-2-azulenyl)benzene as a multielectron redox system with liquid crystalline behavior

[structure: see text] This paper describes the cyclotrimerization reaction of di(2-azulenyl)acetylenes (2a,b) catalyzed by Co2(CO)8 to produce hexa(2-azulenyl)benzene derivatives (1a,b). The cyclooligomerization of 2a and 2b utilizing CpCo(CO)2 as a catalyst produced (eta5-cyclopentadienyl)[tetra(2-azulenyl)cyclobutadiene]cobalt complexes (3a,b). The redox behavior of hexakis(6-octyl-2-azulenyl)benzene (1b), bis(6-octyl-2-azulenyl)acetylene (2b), and the cobalt complexes 3a and 3b along with 6-octyl-2-phenylazulene (19) was examined by cyclic voltammetry (CV). The reduction of compound 1b exhibited multiple-electron transfers in one step upon CV with a reduction potential similar to that of compound 19. However, the CVs of compounds 2b, 3a, and 3b were characterized by stepwise waves because of the reduction of each azulene ring. The mesomorphic behaviors of 1b, 2b, and 19 were also studied by differential scanning calorimetry (DSC), polarizing optical microscopy (POM), and X-ray diffraction (XRD) techniques. A new series of azulene derivatives, 1b, 2b, and 19, substituted by a long alkyl chain at the 6-position shows mesomorphism with crystalline polymorphs. Compound 1b showed a large temperature range of hexagonal columnar mesophases (Col(ho)) from 115.5 to 199.9 degrees C. Compound 2b has rectangular columnar (Col(ro)), smectic E (S(E)), and nematic (N) mesophases. Compound 19 exhibited an S(E) mesophase.     

Reactions of some benzofuran derivatives with amides,nitriles and hydrazines

When 6-acetoacetyl-5-methoxy- ( 1b ) and 5-acetoacetyl-6-methoxy-2,3-diphenylbenzofuran ( 2b ) were treated with cyanoacetamide, the corresponding pyridinecarbonitriles were obtained. Compounds 1b and 2b reacted with ethyl cyanoacetate in the presence of ammonium acetate to give the benzofuranyl-pyrone derivatives. This reaction, when carried out in presence of diethylamine, led to the formation of furochromones. Hydrazine hydrate, phenylhydrazine and semicarbazide hydrochloride reacted with 1b and 2b with the formation of the corresponding pyrazoles. The corresponding isoxazole derivatives were formed by the reaction of 1b and 2b with hydroxylamine hydrochloride.     

Synthesis of Dibutadienyl Piperazines, 1,1-Dithio and 1,4-Dithio Substituted Dienes from Nitrodienes

Nitrodiene 1a , 1b reacted with 1,4-dithiolbutan and gave the heterocyclic compounds 3a , 3b . 1b gave with 1,3-acetonedithiol the compound 5b . The nitrodiene compound 1b reacted with o-dithiolbenzene ( 6 ) and yielded the ketene dithioacetal ( 7b ). Heterocyclic compounds 11a , 11b , 12a , and 12b were prepared from the reactions of 9a with 2,2'-oxydiethanethiol. The compounds 9a , 9b were prepared from 2-nitropentachloro-1,3-butadiene and alkylthiols ( 8a , 8b ). Mono(thio) substituted diene compound 9b gave dibutadienyl piperazine 14b with piperazine in diethylether.     

π-Extended Thiadiazoles Fused with Thienopyrrole or Indole Moieties: Synthesis, Structures, and Properties

We report the syntheses, structures, photophysical properties, and redox characteristics of donor-acceptor-fused π-systems, namely π-extended thiadiazoles 1-5 fused with thienopyrrole or indole moieties. They were synthesized by the Stille coupling reactions followed by the PPh(3)-mediated reductive cyclizations as key steps. X-Ray crystallographic studies showed that isomeric 1b and 2b form significantly different packing from each other, and 1a and 4a afford supramolecular networks via multiple hydrogen bonding with water molecules. Thienopyrrole-fused compounds 1b and 2b displayed bathochromically shifted intramolecular charge-transfer (CT) bands and low oxidation potentials as compared to indole-fused analog 3b and showed moderate to good fluorescence quantum yields (Φ(f)) up to 0.73. In 3b-5b, the introduction of electron-donating substituents in the indole moieties substantially shifts the intramolecular CT absorption maxima bathochromically and leads to the elevation of the HOMO levels. The Φ(f) values of 3-5 (0.04-0.50) were found to be significantly dependent on the substituents in the indole moieties. The OFET properties with 1b and 2b as an active layer were also disclosed.     

Synthesis and EPR studies of 2-N-tert-butylaminoxylpurine derivatives

[Structure: see text] 2'-Deoxyribofuranosylpurine derivatives bearing an N-tert-butylaminoxyl group (1a and 2a) were synthesized via oxidation of the corresponding N-tert-butylhydroxylamines (1b and 2b), which were synthesized by lithiation of 8-TIPS-6-chloropurine (3) at the 2-position and the following reaction with 2-methyl-2-nitrosopropane. Treatment of 1b and 2b with 1 equiv of NaIO4 resulted in efficient formation of 1a and 2a, which were isolated as purple and red solids, respectively. The EPR spectra of 1a showed pH dependency due to structural change of purine moiety.     

Two pairs of chlorine-containing phenylpropanoid enantiomers from Acorus tatarinowii

Two pairs of chlorine-containing phenylpropanoid enantiomers (1a/1b and 2a/2b) were isolated from the rhizomes of Acorus tatarinowii. Interestingly, these optical isomers (1a/1b and 2a/2b) were co-existed in the same plant, which were characterized as the first halogen-containing natural products from the genus Acorus. Their structures and absolute configurations were elucidated by a combination of spectroscopic analysis and a single-crystal X-ray diffraction, assisted by a modified Mosher's method. The phenylpropanoid isomers (1a/1b and 2a/2b) were evaluated for their antioxidant activities using DPPH assay and cytotoxic activities against five human cancer cell lines.     

Mesoionic dimethyl derivatives of some 1,2,4-triazinones. The course of the reaction of 3,5-dimethoxy, 3-methoxy-5-methylthio, 5-methoxy-3- methylthio and 3,5-bis(methylthio)-1,2,4-triazine with methyl iodide

Treatment of 3,5-dimethoxy-1,2,4-triazine ( 1a ) with methyl iodide was found to give depending on the reaction time triazinium iodide 2a , triaziniumolates 4a and 6a as well as methoxytriazinones 7a and 8a . Thermolysis of 2a gave triaziniumolates 4a and 6a . Reaction of 2a , 4a or methoxytriazinone 9a with methyl iodide in acetonitrile yielded as the sole product 6a . Reaction of 3-methoxy-5-methylthio-1,2,4-tri-azine (1b ) with methyl iodide gave triazinium iodide 2b and methylthio triazinone 7b . Hydrolysis of 2a,b afforded 4a . Reaction of 5-methoxy-3-methylthio-1,2,4-triazine ( 1c ) with methyl iodide gave triazinium iodide 2c , triaziniumolate 4b , triazinium iodide 5b and triazinone 8b . Hydrolysis of 2c yielded 4b and its thermolysis gave a mixture of 4b and 5b . Reaction of 2c , 4b and triazinone 9b with methyl iodide afforded 5b . Treatment of 3,5-bis(methylthio)-1,2,4-triazine ( 1d ) with methyl iodide was found to give a mixture of N1 and N2 methiodides 2d and 3d which gave on hydrolysis 4b and 8b , respectively. Methylation of 6-methyl derivatives 1c-g gave analogous results, however the proportions of N1 methylated products were lower and the reaction rates higher in comparison to their respective lower homologues 1a,c,d . The structures of the mesoionic dimethyl derivatives were assigned from uv, ir, ¹H nmr and electron impact mass spectra. The structural assignments were eventually confirmed by quantum chemical calculations of net charge distributions, bond lengths and ipso angles of the C5?O bonds.     

新型萘并氧杂并喹啉酮和萘并吖啶二酮的合成及其荧光性质的研究

以2-溴甲基-3-喹啉甲酸乙酯(1)为底物, 分别与α-萘酚和β-萘酚“一锅法”高产率合成了2-(α-萘氧甲基)-3-喹啉甲酸(2a)和2-(β-萘氧甲基)-3-喹啉甲酸(2b). 化合物2a, 2b用Eaton试剂(五氧化二磷-甲基磺酸)作为环化试剂, 发生分子内Friedel-Crafts酰基化反应得到两种新型闭环产物: 萘并[2’,1’,6,7]氧杂并[3,4-b]喹啉-7(14H)-酮(3a)和萘并[1’,2’,6,7]氧杂并[3,4-b]喹啉-15(8H)-酮(3b). 化合物3a, 3b在氢氧化钾的乙醇-水溶液中经1,2-Wittig重排和空气氧化生成萘并[2,1-b]吖啶-7,14-二酮(4a)和萘并[1,2-b]吖啶-7,14-二酮(4b). 所合成新化合物2a～4a, 2b～4b的结构通过 IR, UV, 1H NMR, MS和元素分析进行了确认. 测定了化合物2a～4a, 2b～4b在三氯甲烷中的紫外光谱和化合物3a, 4a和3b, 4b的固体荧光光谱, 2a～4a, 2b～4b在三氯甲烷中的最大吸收峰分别位于280, 261, 312, 273, 256和313 nm; 3a, 4a和3b, 4b在固态状态下的最大发射波长分别为350, 300, 274和330 nm.     

Syntheses of N,N′-Bis(salicylideneiminoethyl)oxamidatodicopper(II), N,N′-Bis(salicylideneiminoisopropyl)-oxamidatodicopper(II), and N,N′-Bis(2-pyridylideneiminopropyl)oxamidatodicopper(II) Nitrate and Corresponding Perchlorate

Reactions of coordinated functional groups were carried out as follows: The product formed by reaction of A-1a

1 The four new complexes are shown as A-3a, A-3b, B-3a, and B-3b (cf. Fig. 1), and other related complexes are shown as A-1a, A-1b, A-2a, A-2b, B-n, B-1, B-4, and B-5 (cf. Fig. 2)

or A-1b with copper(II), reacts with salicylaldehyde to give A-3a or A-3b, respectively. And the product formed by reaction of B-1 with copper(II), reacts with pyridine-2-aldehyde to give B-3a or B-3b. The four binuclear copper(II) complexes thus isolated as the new compounds have been characterized by elemental analyses, u.v. and i.r. spectra, magnetic susceptibility, and electronic conductivity measurements. Attempts to exchange the reactants with one another were unsuccessful.