Synthesis and structure of 9,10-bis(2,4,6-triisopropylphenyl)-9,10-dihydro-9,10-disilaanthracene

We prepared a 9,10-dihydro-9,10-disilaanthracene (DSA) derivative 4 bearing a bulky aryl substituent, a 2,4,6-triisopropylphenyl (Tip) group, on the silicon atoms via a Wurtz-type coupling reaction between two molecules of (2-chlorophenyl)(2,4,6-triisopropylphenyl)silane (3) in a head-to-tail fashion. The structural determination of cis-4 and trans-4 was examined using ¹H NMR spectroscopy and theoretical calculations. In addition, the molecular structure of cis-4 was unambiguously determined by X-ray crystallography. The tricyclic DSA skeleton of cis-4 adopts a folded structure with a boat-like central ring in which the rotation about the Si-Tip bond is restricted. In contrast, theoretical calculations suggest that the tricyclic DSA skeleton of trans-4 has an almost planar structure.     

Total synthesis of (-)-sessilifoliamide C and (-)-8-epi-stemoamide

A convergent route featuring [3,3]-sigmatropic rearrangements of a linchpin azepinopyrrolidine served to install two of the four contiguous stereocenters present in the tricyclic Stemona alkaloids sessilifoliamide and stemoamide. In addition to the first total synthesis of (-)-sessilifoliamide C, a potential biosynthetic relationship between the sessilifoliamides and previously reported Stemona alkaloids is presented.     

2,6-双(对氨基苯基偶氮)-9,10-蒽二酮的合成

从2,6-二氨基蒽醌出发,经亚硝酰硫酸双重氮化,再与苯胺偶合合成了未见文献报道的三阶有机非线性光学材料———2,6-双(对氨基苯基偶氮)-9,10-蒽二酮,收率56.8%。其结构经1H NMR,IR和元素分析确证。     

Synthesis of 11-amino-9,10-dihydro-9,10-(ethano)anthracen-12-ylphosphonic acid

Synthesis of a new representative of β-aminophosphonic acids and related esters, namely, 11-amino-9,10-dihydro-9,10-(ethano)anthracen-12-ylphosphonic acid and the respective bis(2-chloroethyl)-phosphonate was carried out.     

2,6-双(对羟基苯基偶氮)-9,10-蒽醌的合成

以2,6-二氨基蒽醌为原料,经硝酸钠与盐酸双重氮化制得2,6-二氨基蒽醌双重氮盐(2);2与苯酚偶合合成了未见文献报道的双偶氮类化合物--2,6-双(对羟基苯基偶氮)-9,10-蒽醌(3),其结构经1H NMR,IR,MS和元素分析表征.最佳的偶合反应条件为: 2 2.0 mmol,n(2) ∶ n(苯酚)＝1.0 ∶ 2.5,在pH=9的条件下,于0 ℃～5 ℃反应4 h,3的收率60%.     

9,10-双-三甲基硅乙炔基蒽的合成及其光谱性质研究

<正>苯乙炔类化合物是一类π-共轭化合物,具有重要的理论研究价值,在分子导线、分子传感器、液晶显示中的偏振器、发光二极管和能量传输材料等光电领域有着广泛的应用[1-6]。目前对苯乙炔类聚合物和齐聚物的研究很多,而对苯乙炔类小分子研究得很少。我们采用对二溴蒽和三甲基     

Synthesis and crystal structure of 9,10-dihydro-9,10-etheno-1,8-dichloro-11-diphenylphosphinyl-12-(diphenylphosphinylethynyl)anthracene

The title compound, 9,10-dihydro-9,10-etheno-1,8-dichloro-11-diphenylphosphinyl-12-(diphenylphosphinylethynyl)anthracene (1), has been synthesized and its crystal structure has been determined. The compound 1 crystallized into the triclinic space group P-1 with =74.837(4)°, β=88.156(4)°, γ=65.398(4)°, Z=2, D_c=1.352 gcm⁻³. In the crystal structure of 1a, one chloroform molecule was included by the compound 1 with a 1:1 ratio and the existence of non-classical intermolecular C–HO hydrogen bonds, intramolecular C–HCl and C–HO hydrogen bonds and π–π stacking were observed.     

11,11,12,12-四氰基-2-对甲基苯基-9,10-蒽醌二甲烷的合成及其光谱性能

以邻苯二甲酸酐和对溴甲苯为原料,经Friedel-Crafts酰基化、浓硫酸催化、Suzuki偶联及Knoevenagel缩合合成了一种新型的四氰基-9,10-蒽醌二甲烷衍生物——11,11,12,12-四氰基-2-对甲基苯基-9,10-蒽醌二甲烷(5),其结构经1H NMR,ESI-MS和元素分析表征。UV-Vis和荧光光谱研究表明,5在249 nm,332 nm和426nm有较强吸收;在375 nm激发波长激发下,5的最大发射波长在595 nm。     

Transformation of 1-(acyl)(2-haloethyl)amino-9,10-anthraquinones into 1-(2-acyloxyethylamino)-9,10-anthraquinones

Acylation of 1-(2-haloethylamino)-9,10-anthraquinones gave 1-[(2-haloethyl)(aroyl, hetaroyl, or acetyl)amino]-9,10-anthraquinones which were converted into the corresponding 1-[2-(aroyloxy, hetaroyloxy, or acetoxy)ethylamino]-9,10-anthraquinone on keeping in dimethylformamide. According to the experimental data (including those obtained by kinetic study), the transformation involves intramolecular migration of the acyl group through aziridinium or oxazolidinium intermediates.     

Synthesis of Dialkyl 4-Ethoxy-2,5-dihydro-1-(9,10-dihydro-9,10-dioxoanthracen-1-yl)-5-oxo-1H-pyrrole2,3-dicarboxylates

Abstract

The reaction of ethyl 9,10-dihydro-9,10-dioxoanthracen-1-yl-carbamoyl-formate with dialkyl acetylenedicarboxylates in the presence of triphenylphosphine leads to dialkyl 4-ethoxy-2,5-dihydro-1-(9,10-dihydro-9,10-dioxoanthracen-1-yl)-5-oxo-1H-pyrrole-2,3-dicarboxylates in fairly good yields. A dynamic NMR effect is observed as a result of restricted rotation around the single bond linking the anthraquinone moiety and the heterocyclic ring system, which is attributed to the interaction between the pyrrole residue and the peri C═O group.     

Synthesis of 12-aza analogs of epothilones and (E)-9,10-dehydroepothilones

N-Boc-12-aza-epothilone analog (azathilone) 1 is a potent inhibitor of human cancer cell growth and represents a structurally new class of natural product-derived microtubule-stabilizing agents. Compound 1 has been prepared employing a convergent strategy that is based on the consecutive assembly of building blocks 3, 4, and 19 into diene 20 and subsequent RCM-mediated macrocycle formation. The aldol reaction between aldehyde 3 and ketone 4 delivered the required 6R,7S diastereoisomer 5 with good selectivity and provided a reliable entry into the stereoselective synthesis of carboxylic acid 12. RCM with diene 20 was highly E-selective, thus giving efficient access to (E)-9,10-dehydro-1 (2). The latter is a key analog in SAR studies with 1.     

Synthesis and Properties of 2-(2-Furyl)- and 2-(2-Thienyl)-1-methylphenanthro[9,10-d]imidazoles

Condensation of 9,10-phenanthrenequinone with 2-furaldehyde and 2-thiophenecarbaldehyde in glacial acetic acid in the presence of ammonium acetate gave 2-(2-furyl)- and 2-(2-thienyl)phenanthro[9,10-d]imidazoles which were converted into the corresponding 1-methyl derivatives. The furan and thiophene rings in the products lose their acidophobic properties. Depending on the conditions, electrophilic substitution reactions in 2-(2-furyl)- and 2-(2-thienyl)phenanthro[9,10-d]imidazoles occur both at the furan (thiophene) and phenanthrene moieties.     

Synthesis and polymerization of (E,E)-[6.2](9,10)anthracenophane-1,5-diene

The title compound has been synthesized by dimerization of a substituted p-xylylene, generated via a 1,8-Hofmann elimination. Several unique isomers of this dimer are also obtained. The title diene can be polymerized cationically to give low molecular weight polymer. Oxidative doping of this polymer with iodine forms a material with a conductivity of 3 × 10^?4 S/cm. In contrast to previously reported anthracenophanes this polymer is photochemically unreactive.     

2,2,7,7-四甲基-5,6-二氧代-9-(2-氯苯基)-10-(4-甲基苯基)-9,10-二氢-2H-吖啶的合成和晶体结构

标题化合物2,2,7,7-四甲基-5,6-二氧代-9-(2-氯苯基)-10-(4-甲基苯基)-9,10-二氢-2H-吖啶(C30H32ClNO2,Mr=474.02)是由邻氯苯甲醛和5,5-二甲基-1,3-环己二酮和对甲基苯胺以乙二醇作溶剂在微波辐射下而得到的。结构通过单晶X-射线衍射分析确定,其晶体属于单斜晶系,空间群P21/c,a=12.048(3),b=11.044(2),c=19.989(5)?b=101.42(2),Z=4,V=2607(1)3,Dc=1.208g/cm3,m(MoKa)=0.173mm-1,F(000)=1008,R=0.0450,wR=0.0869。X-射线衍射分析表明:原子C(8),C(13),C(14),C(15),C(20)和N形成1个六员环,采用船式构象,六员环C(8)~C(13)和C(15)~C(20)采用半椅式构象。     

9,10-双-(对-(甲氧基二缩三乙二醇基)苯基乙炔基)蒽的合成、自组装及其光谱分析

通过Sonogashira偶联等反应,合成了三嵌段化合物9,10-双-(对-(甲氧基二缩三乙二醇基)苯基乙炔基)蒽,通过¹H NMR和基质辅助激光解吸电离时间飞行质谱(MALDI-TOF-MS)对其结构进行了表征。利用差示扫描量热仪(DSC)、偏光显微镜(POM)及小角X射线散射仪(SAXS)等技术手段对其本体自组装行为进行了研究,结果表明,化合物在固态相自组装成近晶A相(SmA相)。光谱分析表明,该化合物继承了二取代蒽类发光材料具有高荧光量子产率(Φ_f)的特点,是一种性能良好的光致发光材料。     

Synthesis and transformations of 2-(2-furyl)- and 2-[β-(2-furyl)vinyl] phenanthr [9,10]imidazoles

The corresponding 2-(2-furyl)- and 2-[-(2-furyl)vinyl] phenanthr[9,10]imidazoles were obtained by the condensation of 9,10 phenanthrenequinone with furfural, -(2-furyl)acrolein, and their 5-bromo and 5-nitro derivatives in the presence of ammonium acetate in glacial acetic acid. Their metallation, acetylation, nitration, and replacement of halogen by a nitro group were studied.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1014–1016, August, 1971.