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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72条记录   Ruthenium tetroxide oxidation of N-acyl cyclic amine-2-phosphonic acid diesters. [作者：Kaname, Mamoru;Mashige, Hironori;Yoshifuji, Shigeyuki;Sashida, Haruki;,期刊：Heterocycles, 页码：429-438 , 文章类型： 研究论文，,卷期：2008年76-1] The utility of the RuO4 oxidn. of N-acyl cyclic amine-2-phosphonate esters was investigated. The oxidn. of the N-protected 2-pyrrolidine- and 2-piperidinephosphonate diesters under the std. double layer condition of AcO... Synthesis of 1,2,4-trisubstituted imidazoles and 1,3,5-trisubstituted 1,2,4-triazoles. [作者：Baumgartner, Corinne;Brandli, Lukas;Diederich, Francois;,期刊：Heterocycles, 页码：401-428 , 文章类型： 研究论文，,卷期：2008年76-1] Synthetic strategies are reported to easily access 1,2,4-trisubstituted followed by substitution at N(1). Furthermore, a synthesis of trisubstituted 1,2,4-triazoles via a cyclization of hydrazonamides is described. Heteropoly acids: green chemical catalysts in organic synthesis. [作者：Ueda, Tadaharu;Kotsuki, Hiyoshizo;,期刊：Heterocycles, 页码：73-97 , 文章类型： 综述，,卷期：2008年76-1] A review. Heteropoly acids were used in various fields of org. synthesis mainly due to their characteristic features: they are cost-effective reagents that are strongly acidic, environmentally friendly, and highly effic... Efficient preparation of 2-imidazolines from aldehydes and ethylenediamines with 1,3-diiodo-5,5-dimethylhydantoin. [作者：Takahashi, Shogo;Togo, Hideo;,期刊：Heterocycles, 页码：507-514 , 文章类型： 研究论文，,卷期：2008年76-1] Various 2-imidazolines were prepd. in high yields by reacting aldehydes and ethylenediamines with 1,3-diiodo-5,5-dimethylhydantoin. Moreover, chiral 1,3-diimidazolin-2-ylbenzene and 2,6-diimidazolin-2-ylpyridines, which... Preparation of new nitrogen-bridged heterocycles. Part 63. [作者：Unexpected formation of thieno[3',4':4,5]imidazo[1,2-a]pyridines. Kakehi, Akikazu;Suga, Hiroyuki;Izumita, Atsushi;Abe, Takashi;,期刊：Heterocycles, 页码：391-399 , 文章类型： 研究论文，,卷期：2008年76-1] The alk. treatment and dehydrogenation of pyridinium salts, obtainable from the S-alkylation of 3,5-dimethylpyridinium 2-alkylthio-1-cyano-2-thioxoethylides with phenacyl bromides, afforded unexpected heterocycles, 3-alk... Chiral cationic Pd-phosphinooxazolidine catalysts for a highly efficient asymmetric Diels-Alder reaction in ionic liquids. [作者：Nakano, Hiroto;Nishiuchi, Yasuhiro;Takahashi, Kouichi;Fujita, Reiko;Uwai, Koji;Takeshita, Mitsuhiro;,期刊：Heterocycles, 页码：381-390 , 文章类型： 研究论文，,卷期：2008年76-1] Chiral cationic palladium-phosphinooxazolidine catalysts in ionic liq. afforded good to excellent enantioselectivity in Diels-Alder reactions of cyclic and acyclic 1,3-dienes with N-acryloyl-2-oxazolidinones. The cataly... Silver-catalyzed synthesis of 1,2-dihydroisoquinolines through direct addition of carbon pronucleophiles to ortho-alkynylaryl aldimines. [作者：Asao, Naoki;Salprima, Yudha S.;Nogami, Tsutomu;Yamamoto, Yoshinori;,期刊：Heterocycles, 页码：471-483 , 文章类型： 研究论文，,卷期：2008年76-1] AgOTf-catalyzed reaction of 2-alkynyl-aryl aldimines with various kinds of pro-nucleophiles afforded a variety of 1,2-dihydroisoquinolines in good to high yields. Treatment of 2-alkynyl-aryl aldimines with a stoichiomet... Enantiomeric resolution of racemic C2-symmetric trans-2,5-dimethyl-2,5-diphenylpyrrolidine and trans-2,5-dimethyl-2,5-bis(3-hydroxyphenyl)pyrrolidine by a diastereomer method. [作者：Uchida, Yoshiaki;Nakayama, Yoichi;Suzuki, Katsuaki;Oki, Shigeaki;Horiguchi, Masahiro;Tsue, Hirohito;Tamura, Rui;,期刊：Heterocycles, 页码：875-881 , 文章类型： 研究论文，,卷期：2008年76-1] The racemic samples of C2-sym. trans-2,5-dimethyl-2,5-diphenylpyrrolidine (I, R = H) and trans-2,5-dimethyl-2,5-bis(3-hydroxyphenyl)pyrrolidine (I, R = OH) have been resolved by the diastereomer method using D- or L-tart... Development of tightly convoluted polymeric phosphotungstate catalysts and their application to an oxidative cyclization of alkenols and alkenoic acids. [作者：Yamada, Yoichi M. A.;Guo, Haiquin;Uozumi, Yasuhiro;,期刊：Heterocycles, 页码：645-655 , 文章类型： 研究论文，,卷期：2008年76-1] Tightly convoluted polymeric phosphotungstate catalysts were prepd. via ionic-assembly of H3PW12O40 and poly(alkylpyridinium)s. An oxidative cyclization of various alkenols and alkenoic acids was efficiently promoted by... A facile and efficient synthesis of mono- and bis-functionalized meso-substituted porphyrins via palladium-catalyzed Negishi cross-coupling. [作者：Takanami, Toshikatsu;Yotsukura, Miku;Inoue, Wakaba;Inoue, Naoyuki;Hino, Fumio;Suda, Kohji;,期刊：Heterocycles, 页码：439-453 , 文章类型： 研究论文，,卷期：2008年76-1] A series of mono- and bis-functionalized meso-substituted porphyrins bearing chem. reactive functional groups such as CO2R, Cl, and CN in the alkyl substituents at the meso positions were efficiently synthesized by the r... Total synthesis of an endothelin converting enzyme inhibitor, TMC-66. [作者：Hosokawa, Seijiro;Fumiyama, Hitoshi;Fukuda, Hisato;Fukuda, Tomohiro;Seki, Masashi;Tatsuta, Kuniaki;,期刊：Heterocycles, 页码：699-713 , 文章类型： 研究论文，,卷期：2008年76-1] The first total synthesis and structural detn. of TMC-66, an ECE inhibitor, was achieved in short steps by efficient construction of two tricyclic segments and coupling reactions. The intramol. oxidative coupling with p... The octaethylporphyrin-dihexylbithiophene derivatives combined with pyridine and pyrimidine rings. Their syntheses and proton-mediated and heat-driven spectral changes. [作者：Higuchi, Hiroyuki;Hayashi, Naoto;Matsukihira, Takuya;Kawakami, Takanori;Takizawa, Toru;Saito, Junji;Miyabayashi, Keiko;Miyake, Mikio;,期刊：Heterocycles, 页码：353-380 , 文章类型： 研究论文，,卷期：2008年76-1] Nickel octaethylporphyrin (NiOEP)-dihexylbithiophene (DHBTh) derivs. combined with pyridine (Pyr) and pyrimidine (Pym) as proton-acceptable rings (PAR) were synthesized, describable as NiOEP-DHBTh-PAR, in which all the N... Proton dissociation-induced tautomerization of 4-substituted 7-hydroxycoumarin and its bridged dimer in the ground state. [作者：Umeto, Hirohide;Kobayashi, Kanna;Igarashi, Tetsutaro;Sakurai, Tadamitsu;,期刊：Heterocycles, 页码：161-168 , 文章类型： 研究论文，,卷期：2008年76-1] An investigation was undertaken to elucidate solvent effects on the intramol. interaction between the 7-hydroxycoumarin chromophores in the title bridged dimer in the presence of tertiary amine. Anal. of equil. consts. ... Reversible encapsulation of terminal alkenes and alkynes. [作者：Ajami, Dariush;Rebek, Julius, Jr.;,期刊：Heterocycles, 页码：169-176 , 文章类型： 研究论文，,卷期：2008年76-1] Equilibriums, Chemical Equilibriums, and Solutions) Section Mol. encapsulation is a modern form of recognition in which a host completely surrounds a guest mol. Unlike earlier covalent systems, reversible assembly allow... A simple chiral template for the synthesis of functionalized a-arylglycine derivatives. [作者：Nakata, Hiyoku;Imai, Takahiro;Yokoshima, Satoshi;Fukuyama, Tohru;,期刊：Heterocycles, 页码：747-757 , 文章类型： 研究论文，,卷期：2008年76-1] A simple chiral template for the synthesis of arylglycine derivs. was developed. The chiral template, which is derived from valinol in 3 steps, reacts with electron-rich arom. compds. to afford adducts in good yield wit... Study of synthetic routes for the spiroketal fragment in calyculin A based on conformational analysis. [作者：Matsumoto, Takatoshi;Kabeya, Mototsugu;Morishita, Eiichi;Shioiri, Takayuki;,期刊：Heterocycles, 页码：321-328 , 文章类型： 研究论文，,卷期：2008年76-1] The conformational anal. of the spiroketal fragment of calyculin A revealed that a series of the Wittig reaction by way of the Swern oxidn. was suitable for the addn. of the C1-unit for the prepn. of the spiroketal fragm...