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文章名     作者     期刊名     摘要     卷     期         如果没有找到您所需要的文献，请点击 ——此处申请     共17条记录   Improved convenient and environmentally benign synthesis of biological active benzimidazoles using activated carbon and molecular oxygen. [作者：Tagawa, Yoshinobu;Yamagata, Kenji;Sumoto, Kunihiro;,期刊：Heterocycles, 页码：415-418 , 文章类型： 研究论文，,卷期：2008年75-2] The reaction of 1,2-phenylenediamine with a variety of arom. aldehydes in xylenes gave the corresponding benzimidazole derivs. in good to excellent yields (82-93%) in the presence of dry activated carbon and bubbling mol... A novel synthesis of 1,4-bis(thiopyrano[2,3-d]thiazolyl)benzene derivatives. [作者：Metwally, Nadia Hanafy;,期刊：Heterocycles, 页码：319-329 , 文章类型： 研究论文，,卷期：2008年75-2] The novel 5-(4-formylphenyl)methylenethiazolidine-2,4-dithione (I) and were synthesized by condensation of each of 4-thioxo-thiazolidin-2-one (III) and thiazolidine-2,4-dithione (IV) with terephthalaldehyde (V) in good y... An improved quinoline synthesis in the presence of nickel chloride. [作者：Dabiri, Minoo;Baghbanzadeh, Mostafa;Arzroomchilar, Elham;,期刊：Heterocycles, 页码：397-401 , 文章类型： 研究论文，,卷期：2008年75-2] NiCl2.6H2O was used as an efficient catalyst for the synthesis of quinolines by the reaction of 2-aminoaryl ketones and a-methyleneketones under the solvent-free conditions. The clean, mild acidity conditions and quant.... Synthesis of in vivo metabolites of the new adenosine A3 receptor PET-radiotracer [18F]FE UPPY. [作者：Shanab, Karem;Wadsak, Wolfgang;Mien, Leonhard-Key;Mitterhauser, Markus;Holzer, Wolfgang;Polster, Victoria;Viernstein, Helmut;Spreitzer, Helmut;,期刊：Heterocycles, 页码：339-356 , 文章类型： 研究论文，,卷期：2008年75-2] The synthesis of three expected metabolites I (R1 = OH, R2 = SH, SEt; R1 = OCH2CH2F, R2 = SH) of the new adenosine A3 receptor PET-radiotracer [18F]FE UPPY is described. The target compds. I - all pentasubstituted pyrid... Facile synthesis of a series of 2-(4-alkyloxyphenyl)-5-cyanopyridine liquid crystalline compounds. [作者：Chia, Win-Long;Cheng, Yu Wei;,期刊：Heterocycles, 页码：375-382 , 文章类型： 研究论文，,卷期：2008年75-2] This study describes the facile synthesis of a homologous series of pyridine-contg. liq. cryst. 2-(4-alkyloxyphenyl)-5-cyanopyridines (nOPPyCN, n = 3-7). The subject liq. crystals were prepd. in a short two-step reactio... Asymmetric synthesis of stellettamides A and C. [作者：Yamazaki, Naoki;Suzuki, Takeshi;Yoshimura, Yuta;Kibayashi, Chihiro;Aoyagi, Sakae;,期刊：Heterocycles, 页码：285-290 , 文章类型： 研究论文，,卷期：2008年75-2] The first synthesis of the marine indolizidine alkaloids, (+)-stellettamide A (I) and (-)-stellettamide C (II) as the H2PO4- and Cl- salts, resp., was achieved through a coupling reaction with the aminomethylindolizidine... Oligomers containing ethynylpyridazine moieties: synthesis, fluorescence and liquid crystalline properties. Diazines 50. [作者：Achelle, Sylvain;Ple, Nelly;Kreher, David;Mathevet, Fabrice;Turck, Alain;Attias, Andre-Jean;,期刊：Heterocycles, 页码：357-374 , 文章类型： 研究论文，,卷期：2008年75-2] Conjugated oligomers with ethynylpyridazine units, e.g. I, have been synthesized by Sonogashira and Suzuki cross-coupling reactions. Some of them present interesting liq. crystal properties investigated by differential s... N-Bromosuccinimide (NBS) as promoter for acylation of sydnones in the presence of acetic anhydride under neutral conditions. [作者：Ghasemnejad-Bosra, Hassan;Haghdadi, Mina;Gholampour-Azizi, Issa;,期刊：Heterocycles, 页码：391-395 , 文章类型： 研究论文，,卷期：2008年75-2] Various 4-acetyl-sydnones were prepd. by reaction of the corresponding 3-aryl-sydnones with acetic anhydride at ~110 癈 promoted by N-bromosuccinimide as an effective reagent for acylation of sydnones under neutral condit... First example of Diels-Alder reaction of 4-(1-ethenyl substituted)-3-methylisoxazoles with acetylenedicarboxylates. [作者：Chimichi, Stefano;Cosimelli, Barbara;Boccalini, Marco;Matteucci, Alessandra;Messaoudi, Abdelatif;,期刊：Heterocycles, 页码：331-338 , 文章类型： 研究论文，,卷期：2008年75-2] The first example of a [4+2] cycloaddn. reaction of 4-(1-ethenyl)isoxazoles I (R = Me, SiMe3) with acetylenedicarboxylates is reported, while the corresponding 5-substituted isomers do not react with the same dienophile;... Barton-Zard pyrrole synthesis and its application to synthesis of porphyrins, polypyrroles, and dipyrromethene dyes. [作者：Ono, Noboru;,期刊：Heterocycles, 页码：243-284 , 文章类型： 研究论文，,卷期：2008年75-2] (Heterocyclic Compounds (More Than One Hetero Atom)) Section A review. Pyrroles prepd. by the reaction of alkyl isocyanoacetates are useful for the synthesis of biol. active pyrroles, porphyrins, polypyrroles, and dipyr... One-pot synthesis of indolizine derivative and its application as multi-dentate ligand. [作者：Niyomura, Osamu;Yamaguchi, Yoshimi;Sakao, Ryo;Minoura, Mao;Okamoto, Yoshihisa;,期刊：Heterocycles, 页码：297-304 , 文章类型： 研究论文，,卷期：2008年75-2] 1-Cyano-3-(2-pyridinecarboxamido)-2-(2-pyridyl)indolizine I was readily synthesized by the one-pot reaction of 2-(cyanomethyl)pyridine with selenium dioxide. The reaction of 3- or 4-(cyanomethyl)pyridines under the same... Synthesis and antitumor activity of combretastatin D-4. [作者：Uno, Kanako;Tanabe, Takamasa;Ogamino, Takahisa;Okada, Ryoko;Imoto, Masaya;Nishiyama, Shigeru;,期刊：Heterocycles, 页码：291-296 , 文章类型： 研究论文，,卷期：2008年75-2] Combretastatin D-4 (I) was synthesized using electrochem. dimerization of phenols as the key step. Anodic oxidn. of bromochloro-phenol deriv. provided the corresponding diaryl ether. Manipulation of the two hydroxyl gro... Mass spectrometry of aromatic cyclic imides and amides. Part I: electron ionization induced decomposition of N-substituted 2,3-pyridinedicarboximides. [作者：Blanco, Maria Mercedes;Perillo, Isabel;,期刊：Heterocycles, 页码：305-317 , 文章类型： 研究论文，,卷期：2008年75-2] The behavior of a series of N-substituted 2,3-pyridinedicarboximides (1-14) under electron impact mass spectrometry at 70 eV is analyzed. Compds. under study were divided into three groups according to their substitution... Synthesis of 1,3-di(2-thiazolyl)azulene and its selective chromogenic response to mercury(II) ion. [作者：Wakabayashi, Shigeharu;Uriu, Ryoko;Asakura, Tomoko;Akamatsu, Chiharu;Sugihara, Yoshikazu;,期刊：Heterocycles, 页码：383-390 , 文章类型： 研究论文，,卷期：2008年75-2] Azulene derivs. bearing heteroaryl groups in the 1,3-positions were synthesized, and the color and spectral changes occurring upon the addn. of metal ions were examd. Of the compds. tested, title compd. 4 appears to exh... Three new flavonol glycosides from the aerial parts of Tetragonia tetragonoides. [作者：Lee, Kyu Ha;Park, Ki Myun;Kim, Kyung Ran;Hong, Jongki;Kwon, Hak Cheol;Lee, Kang Ro;,期刊：Heterocycles, 页码：419-426 , 文章类型： 研究论文，,卷期：2008年75-2] Three new flavonol glycosides (1-3) and three known lignan amides (4-6) were isolated from the MeOH ext. of the aerial parts of Tetragonia tetragonoides. The chem. structures of the new compds. (1-3) were detd. to be 6-... Constituents of green and ripened fruit of Garcinia subelliptica. [作者：Terashima, Kenji;Ishida, Tomoko;Furukawa, Tadashi;Takaya, Yoshiaki;Niwa, Masatake;,期刊：Heterocycles, 页码：407-413 , 文章类型： 研究论文，,卷期：2008年75-2] subelliptica fruit, (+)-4'''-O-methylfukugetin (I), and the comparison of the constituents from green and ripened G. subelliptica fruit are described.