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1.
报道俘精酸酐类化合物(E/Z)4-二环丙亚甲基-3-[1-(2, 5-二甲基-3-呋喃基)亚乙基]四氢呋喃-2, 5-酮的拆分, 及(E)和(Z)-5-二氰亚甲基-4-二环丙亚甲基-3-[1-(2, 5-二甲基-3-呋喃基)亚乙基]四氢呋喃-2-酮 4(E)和4(Z)的合成, 并对它们的光致变色特性进行了初步研究。 相似文献
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以6,7-十二烷二酮(或1,2-环烷基二酮)和3-碘-2-碘甲基-1-丙烯为原料,铟粉为催化剂,在水相中经烯丙基化反应合成了4个新型的单烯丙基化产物[7-羟基-7-(2-碘甲基-烯丙基)-十二烷-6-酮和2-羟基-2-(2-碘甲基-烯丙基)-环烷酮]和3个新型的双烯丙基化产物{4-亚甲基-1,2-二戊基-1,2-环戊二醇,2-羟基-2-[2-(1-羟基-2-羰基-环癸基甲基)-烯丙基]-环癸酮和2-羟基-2-[2-(1-羟基-2-羰基-环十二基甲基)-烯丙基]-环十二烷酮},其结构经1H NMR,IR和HR-MS表征。 相似文献
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以4-甲酰基-2,2,5,5-四甲基四氢呋喃-3-酮和间甲基苯胺为原料,经缩合反应制得配体(Z)-4-[(间甲苯胺基)亚甲基]-2,2,5,5-四甲基二氢呋喃-3(2H)-酮(L);以Cu(CH_3COO)_2为铜源,L经配位反应合成了一个新型的铜(Ⅱ)配合物[Cu(L)_2]_n(I),其结构经FT-IR,X-射线单晶衍射和元素分析表征。I属单斜晶系,P2(1)/c空间群,晶胞参数a=11.361 3(19)?,b=24.564(4)?,c=12.026(2)?,α=γ=90°,β=110.452(3)°,V=3 144.6(9)?~3,Dc=1.226 g·cm~(-3),Z=4,R_1=0.051 5,wR_2=0.113 2。 相似文献
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以5-芳基-1,3-环基环己二酮为原料合成了8个未见报道的吖啶酮衍生物,其结构均经元素分析,IR和^1H NMR光谱确证。其中3-呋喃基-6,7-亚甲二氧基-9-甲基-1(2H,4H)-吖啶醇对一些肿瘤细胞有抑制作用。 相似文献
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羟甲基或碘甲基取代的3,4-亚乙基二氧噻吩(EDOT)衍生物与含氰乙基或羧酸基的四硫代富瓦烯(TTF)衍生物通过酯化或醚化反应可生成EDOT-TTF类型的化合物.在此过程中发现,由3,4-二羟基噻吩-2,5-二羧酸甲酯(1)与环氧溴丙烷经醚化反应生成的关环产物是一个由3,4-二氧-羟甲基乙基噻吩-2,5-二羧酸甲酯(2)与3,4-二氧-2’-羟基亚丙基噻吩-2,5-二羧酸甲酯(2’)组成的混合物,两者很难用常规手段分离.由(2+2’)衍生的2,5-二羧酸甲酯-3,4-二氧-碘代甲基亚乙基噻吩(3)和3,4-二氧-碘代亚丙基噻吩-2,5-二羧酸甲酯(3’)以及3,4-二氧-羟甲基亚乙基噻吩(4)与3,4-二氧-2’-羟基亚丙基噻吩(4’)与2-氰乙基硫-3-甲基硫-6,7-二(正己基硫)-四硫代富瓦烯(TTF-1)或2-羧甲基硫-3-甲基硫-6,7-二(正己基硫)-四硫代富瓦烯(TTF-3)进行醚化或酯化反应表现出了高度的选择性,只有3能与TTF-1反应生成结构单一的EDOT-TTF 1.同样只有4能与TTF-3反应生成结构单一的EDOT-TTF 2. 相似文献
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异氰酸苯酯和N-[2-(4, 6-二甲基)-嘧啶基]-羟胺(5)反应生成1-[2-(4, 6-二甲基)-嘧啶基]-1-羟基-3-苯基脲(6)。化合物(6)在三乙胺存在下和氯甲酸乙酯反应生成2-[2-(4, 6-二甲基)-嘧啶基]-4-苯基-1, 2, 4-恶二唑烷-3, 5-二酮(1)。 相似文献
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2,6-二羟甲基-4-氯苯甲醚(3)和2,6-二羟甲基-4-苯基苯甲醇(4)与三缩四乙二醇和四缩五乙二醇的二对甲苯磺酸酯在含有叔丁醇钾的无水四氢呋喃中反应生成甲氧基冠醚5—7。后者与过量无水碘化锂在无水吡啶中廻流有选择性地除去甲基而不影响大环苄醚基的破裂生成三种2’-羟基-1’,3’-亚苯基二甲基冠醚8—10,产率为85—89%。 相似文献
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A novel class of fulgimide, (Z)-4-oxazolylfulgimide ((Z)-1-benzyl-4-isopropylidene-3-[1-(2-aryl-5-methyloxazolyl)ethylidene]tetrahydropyrrole-2,5-dione), was synthesized by the reaction of (Z)-4-oxazolyl fulgide (4-isopropylidene-3-[1-(2-aryl-5-methyloxazolyl) ethylidene]tetrahydrofuran-2,5-dione) with benzyl amine. Photochromic property of (Z)-4-oxazolylfulgimide was studied. Compared with (Z)-4-oxazolylfulgide, the absorption maximum of the colored form of (Z)-4-oxazolylfulgimide is bathochromic-shifted. Substituents on the aryl ring affect the absorption maximum of the open form and the colored form of (Z)-4-oxazolylfulgimide. 相似文献
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S. I. Luyksaar M. M. Krayushkin Yu. A. Pyankov V. A. Barachevsky 《Chemistry of Heterocyclic Compounds》2010,46(7):822-828
The first representatives of thiophene derivatives with two fulgimide fragments in one molecule have been obtained by the
condensation of (3Z)-3-[1-(2,5-dimethyl-3-thienyl)ethylidene]-4-isopropylidene-2,5-furandione with aromatic diamines. The
photochromic properties of the obtained compounds have been investigated and the effect of a spacer, linking the two fulgimide
fragments, on the reaction rates of photocoloration and photodecoloration of these compounds has been studied. 相似文献
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Katritzky AR Jishkariani D Sakhuja R Hall CD Steel PJ 《The Journal of organic chemistry》2011,76(10):4082-4087
Carbene-mediated transformations of N-(3-butylbenzimidazol-3-ium-1-yl)-1-arylmethanimine iodides with carbon disulfide and benzoyl isothiocyanate gave the corresponding NHC·CS(2) betaines in 68-85% and benzoyl-[1-butyl-3-[(E)-(aryl)methyleneamino]benzimidazol-1-ium-2-carbothioyl]azanides, respectively, in 74-85% yields. However, reaction with excess isopropyl isothiocyanate in NaH/THF at room temperature yielded the 1-butyl-1',3'-diisopropyl-3-[(E)-(aryl)methyleneamino]spiro[benzimidazole-2,5'-imidazolidine]-2',4'-dithiones (74-77%). 相似文献
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[reaction: see text] The (Z)-2,3-difluoro-3-stannylacrylic ester is readily prepared from (Z)-1,2-difluorovinyltriethylsilane via stereospecific stannyl/silyl exchange with KF/(Bu3Sn)2O or Bu3SnCl in DMF at 70 degrees C. The corresponding (E)-2,3-difluoro-3-stannylacrylate is prepared by stereospecific carbonylation of (E)-1,2-difluorovinyl iodide followed by low temperature/in situ stannylation of the resultant (Z)-2,3-difluoroacrylic ester. With Cu(I) iodide and Pd(PPh3)4 catalysis, the (Z)- and (E)-stannylacrylate esters readily couple with aryl iodides and vinyl bromides, as well as 2-iodothiophene, at room temperature to stereospecifically produce the respective (E)- and (Z)-2,3-difluoro-3-aryl substituted acrylic esters or conjugated dienes in high yields. 相似文献
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Synthesis of (Z)-4-hydroxytamoxifen and (Z)-2-[4-[1-(p-hydroxyphenyl)-2-phenyl]-1butenyl]phenoxyacetic acid 总被引:1,自引:0,他引:1
The synthesis of (Z)-4-hydroxytamoxifen and (Z)-2-[4-[1-(p-hydroxyphenyl)-2-phenyl]-1-butenyl]phenoxyacetic acid was accomplished using a McMurry reaction as the key step. The perfluorotolyl derivatives of the McMurry products enabled the separation of the minor undesirable geometrical isomer. The methodology proceeds without E,Z isomerization, employs a very mild final debenzylation step compatible with a large array of functional groups, and can be applied to the generation of a variety of 4-hydroxytamoxifen analogues. 相似文献
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C. Cativiela M. D. Diaz De Villegas E. Melndez 《Journal of heterocyclic chemistry》1985,22(6):1655-1657
Several Z-2-methyl(or phenyl)-4-[α-arylethylidene]-5(4H)-oxazolones 3Z, 4Z were prepared. The results obtained were compared by diazomethane insertion and condensation procedure. In order to synthesize E-2-phenyl-4-[α-arylethylidene]-5(4H)-oxazolones 4E hydrogen bromide isomerization in dry benzene was used. 相似文献
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1 INTRODUCTION Organic phosphine compounds always attract great interest for their unique properties and extensive uses in biochemistry, pesticide chemistry and synthetic organic chemistry. In the last two decades, much attention has been paid to phosphorus-containing olefin and acetylenic compounds for their applications in transition metal chemistry, asymmetric catalysis and photorearrang- ement [1~7 ]. Previously, we have reported the crystal structure of a novel host compound which … 相似文献
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Hashimoto H Suzuki K Setaka W Kabuto C Kira M 《Journal of the American Chemical Society》2004,126(42):13628-13629
Novel disilene-iron complexes [(E)- (1E) and (Z)-(eta2-R3SiClSi=SiClSiR3)Fe(CO)4 (1Z), SiR3 = tBu2MeSi] were synthesized by the reaction of the corresponding tetrachlorodisilane with an excess amount of K2Fe(CO)4, and the structures of 1E and 1Z were determined by X-ray crystallography. These complexes constitute not only the first transition-metal complexes with E,Z-isomerism but also the first complexes with halogen-substituted disilene ligands. The initial formation of 1Z during the synthetic reaction and the slow one-way isomerization of 1Z to 1E are rationalized by the intervention of the corresponding silylene complex (R3SiCl2Si)(R3Si)Si=Fe(CO)4. 相似文献