1,2-二苯乙烷的新合成法

氯化苄;还原偶联;Cu2Cl2;1;2-二苯乙烷的新合成法     

微波辐射法合成4-氨基邻苯二甲酰亚胺

以4-硝基邻苯二甲酰亚胺为原料,通过微波辐射合成了4-氨基邻苯二甲酰亚胺。结果表明:选择铁粉作为催化剂,乙酸乙酯为萃取剂,在4-硝基邻苯二甲酰亚胺/氯化铵/铁粉的摩尔比为1.0∶1.0∶3.5,微波辐射时间100 s,微波辐射功率480 W的条件下,4-氨基邻苯二甲酰亚胺的收率最高,达到93.4%。     

合成1，3－二（3－羟丙基）四甲基二硅氧烷的新方法

用二乙氧基二甲基硅烷与３－氯丙醇反应，合成了新化合物３－氯丙氧基乙氧基二甲基硅烷，然后用格氏反应代替Ｗａｌｔｅｒ的钠缩合反应，最后经水解制备了１，３－二（３－羟丙基）四甲基二硅氧烷，总收率为４２．０％。     

N-苄氧基邻苯二甲酰亚胺的合成

以N－羟基邻苯二甲酰亚胺、氯化苄和乙酸钠或三乙胺为原料,通过控制反应温度和反应时间高产率地制备了N－苄氧基邻苯二甲酰亚胺。     

4,4＇-二硝基二苯乙烷(烯)的合成

二硝基二苯乙烯;硝基甲苯;氧化二聚反应;4;4＇-二硝基二苯乙烷(烯)的合成     

5,7-二甲氧基-4-甲基苯酞和5,7-二羟基-4-甲基苯酞的新合成方法

以3,5-二甲氧基苯甲醇为起始原料, 经过五步反应, 合成了5,7-二甲氧基-4-甲基苯酞和5,7-二羟基-4-甲基苯酞这两个用于合成霉酚酸的重要中间体, 产率分别达到80%和72%. 6-氯甲基-2,4-二甲氧基苯甲醛经过亚氯酸钠氧化成酸的同时发生内酯化反应生成5,7-二甲氧基苯酞是最关键的一步.     

1,2-二[3-(6,8-二叔丁基-3,4-二氢-1,3-苯并(口恶)嗪)基]乙烷的合成及晶体结构

N-取代的3,4-二氢-1,3-苯并(口恶)嗪具有生物活性,是潜在的安定剂和镇静剂,还是制备酚醛树脂的潜在中间体[1-3].一般以酚、伯胺和甲醛为原料,通过Mannish缩合反应来制备[4].本文通过2,4-二叔丁基苯酚、乙二胺和甲醛反应,合成了亚乙基桥联的双(口恶)嗪,X-射线单晶衍射测定了它的晶体结构.     

1,4-二乙氧基苯的合成研究

以甲醇或乙醇为溶剂,在氢氧化钾存在下对苯二酚与溴乙烷于60℃反应3h,可以直接合成1,4－二乙氧基苯,收率大于80％。     

1，2-二[3-（6，8-二叔丁基-3，4-二氢-1，3-苯并噁嗪）基]乙烷的合成及晶体结构

N-取代的3，4-二氢-1，3-苯并噁嗪具有生物活性，是潜在的安定剂和镇静剂，还是制备酚醛树脂的潜在中间体。一般以酚、伯胺和甲醛为原料，通过Mannish缩合反应来制备。本文通过2，4-二叔丁基苯酚、乙二胺和甲醛反应，合成了亚乙基桥联的双噁嗪，X-射线单晶衍射测定了它的晶体结构。     

1，2-二（3-甲氧基4-羟基苯基）乙烷的产生条件与表征

1,2-二(3-甲氧基-4-羟基苯基)乙烷(1,2-Bis(4-hydroxy-3-methoxyphenyl)ethane),又名亚乙基双愈创木酚(Ethylenediguaiacol),双香兰素(Divanillyl),结构如图1中副产物.较早的报道[1,2,3]是从原木素降解得到,具有抗氧化及抗肿瘤作用[4].     

High-yield synthesis and characterization of 1,2-bis(p-vinylphenyl)ethane

The quantitative synthesis and complete characterization of 1,2-bis(p-vinylphenyl)ethane (p,p-BVPE) and its meta-, para-mixed isomers are reported. These crosslinkers copolymerize randomly with p-methylstyrene, leading to random crosslink distributions. The crosslinkers are prepared by Grignard coupling of (m,p)-vinylbenzyl chloride in tetrahydrofuran at low temperature to give the statistical mixture of m,m-, m,p-, and p,p-isomers in quantitative yield. Pure p-vinylbenzyl chloride is converted to pure p,p-BVPE. p,p-BVPE has also been separated from the mixture of isomers. The isomers are characterized by elemental analysis, mass spectrometry, ¹H-NMR, and ¹³C-NMR and by reversed-phase HPLC. © 1994 John Wiley & Sons, Inc.     

Crosslinking of styrene–butadiene rubber with 1,2-bis(benzocyclobutenyl)ethane

1,2-Bis(benzocyclobutenyl)ethane (BBCB) was used as a thermally activated crosslinking agent in styrene–butadiene rubber (SBR), both in the raw and carbon black-filled materials. Diels–Alder crosslinking reactions occurred to a significant degree, despite the lack of substituents of opposing electronic effects. The reaction is free of toxic crosslinking promoters and evolved by-products. Various physical properties such as ultimate elongation, tensile strength, and modulus were measured and compared to those properties of a sulfur-cured sample of SBR. Linear relationships were found between the amount of BBCB present and the modulus of the materials, as well as the amount of BBCB and solvent uptake in swell tests. © 1993 John Wiley & Sons, Inc.     

Reaction of dialkyl H-phosphonates with azines and 1,2-bis(tert-butylimino)ethane

Acetaldehyde and butyraldehyde azines and 1,2-bis(tert-butylimino)ethane add only one molecule of dialkyl H-phosphonate at room temperature to form alkyl (-aminoalkyl)phosphonates. IR spectra of compounds obtained are discussed.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 2063–2065, August, 1996.     

Synthesis of 1,2-bis(1-boraadamant-2-yl)ethane derivatives. Crystal structure of the racemic form

Condensation of triallylborane with octa-1,7-diyne followed by treatment of the reaction mixture with methanol afforded a mixture of stereoisomeric 1,4-bis(3-methoxy-3-bora-bicyclo[3.3.1]non-6-en-7-yl)butanes (1a,b). Hydroboration of the latter with a solution of BH₃ in THF yielded the tetrahydrofuran complex of 1,2-bis(1-boraadamant-2-yl)ethane (2) as a mixture of diastereomers. Pure racemate (2a) was obtained by crystallization from the reaction mixture and it was converted into the pyridine complex of 1,2-bis(1-boraadamant-2-yl)ethane (3). The structure of the latter was established by X-ray diffraction analysis. Complex2a was converted into the corresponding racemic 1,2-bis(1-hydroxyadamant-2-yl)ethane (4a) by the carbonylation-oxidation reaction. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 501–505, March, 2000.     

Vibrational Spectroscopic Study of [1,2-bis(4-pyridyl)ethane]metal(II) Tetracyanonickelate(II). 2 m-Xylene Clathrates

Four new Hofmann-type clathrates of the form M(bpa)₂Ni(CN)_4· 2m-xylene (M = Mn , Fe , Co and Ni; bpa = 1,2-bis(4-pyridyl)ethane) have been synthesized and characterized by vibrational spectroscopy. The M(bpa)₂Ni(CN)₄ (M = Fe and Co) host structure is similar to the classical Hofmann-type host framework composed of layers of a two dimensional catena-metal tetra--cyanonickelate(II) network, but in M(bpa)₂Ni(CN)₄ (M = Mn and Ni), the Ni(CN)₄ moiety behaves as a bidentate –[NC-Ni(CN)₂-CN–]– unit in the host framework.     

Synthesis and Crystal Structure of 2,5—Bis（morpholino）—3,4—bis（p—chlorophenyl）thiophene

1 INTRODUCTION -Thiocarbonylthioformamide synthesized in 1980[1, 2] is a class of stable and almost unexplored compounds[3]. We have reported the reaction of - thiocarbonylthioformamides in our previous paper[4]. Here, we will report a novel synthesis of 2 by the reaction of 1 and trimethyl phosphite in refluxing xylene. In order to determine the structure of 2, X- ray crystallographic study was carried out. 2 EXPERIMENTAL 2. 1 Preparation of the title compound Trimethyl phosph…     

Experimental vapor pressures of 1,2-bis(dimethylamino)ethane, 1-methylmorpholine, 1,2-bis(2-aminoethoxy)ethane and N-benzylethanolamine between 273.18 and 364.97 K

In this work, the experimental vapor pressures of four amines 1,2-bis(dimethylamino)ethane, 1-methylmorpholine, 1,2-bis(2-aminoethoxy)ethane and N-benzylethanolamine using a static apparatus are reported. The temperature range is comprised between 273.18 and 364.97 K and the pressure range between 0.782 Pa and 333 kPa. The molar enthalpies of vaporization at 298.15 K were calculated from Clausius–Clapeyron equation fitted on the experimental results.     

1,2-双(2,4,6-三溴-3-甲基苯氧基)乙烷的合成

卤代二苯氧基烷烃是一类广泛应用的阻燃剂,其通式如下: 迄今已见诸文献的除m不同的品种外,已有20种以上^[1],其中应用最广泛并已工业化生产的是1,2-双(2,4,6-三溴苯氧基)乙烷^[2].