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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54条记录   MOLECULAR RECOGNITION OF 2-(ARYLMETHYLTHIO)-INDOLIZINE DERIVATIVES THROUGH AN INTRAMOLECULAR ARENE-pi (CATION) INTERACTION [作者：KAKEHI AKIKAZU; ITOH KENNOSUKE; SUGA HIROYUKI; YAMAGUCHI NOBUHIRO; ABE TAKASHI; YUDA YOHEI; KATSUMATA HARUKA,期刊：Heterocycles, 页码：753-764 , 文章类型： Article，,卷期：2012年84-2] Some 2-(arylmethylthio)indolizines bearing ethoxycarbonyl and/or cyano group(s) at the 1- and 3-positions were synthesized and their conformations were investigated by H-1-NMR spectra and X-ray analyses. Interestingly, i... MICROWAVE-ASSISTED MULTICOMPONENT REACTION IN WATER: HIGHLY STEREOSELECTIVE SYNTHESIS OF PYRIMIDINESPIROISOXAZOLO[5,4-b]PYRIDINE DERIVATIVES [作者：JIANG BO; MA NING; WANG XINGHAN; TU SHUJIANG; LI GUIGEN,期刊：Heterocycles, 页码：765-774 , 文章类型： Article，,卷期：2012年84-2] A multicomponent reaction has been established for the synthesis of pyrimidinespiroisoxazolo[5,4-b]pyridines that can serve as versatile building blocks for both organic and medicinal research. The reasonable reaction me... PREPARATION OF FURAN RING FROM 2-(OXIRAN-2-YL)-1-ALKYLETHANONE CATALYZED BY NAFION (R) SAC-13 [作者：TOMBE RIHOKO; MATSUBARA SEIJIRO,期刊：Heterocycles, 页码：775-783 , 文章类型： Article，,卷期：2012年84-2] Treatment of a 2-(oxiran-2-yl)-1-alkylethanone with Nafion (R) SAC-13 induced a cyclization reaction into furan ring. This method gave furans with a small amount of acid without aqueous work up. REARRANGEMENT REACTION OF 1-ETHOXY- AND 1-HYDROXY-2-PHENYLINDOLE [作者：YAMADA KOJI; SOMEI MASANORI,期刊：Heterocycles, 页码：785-799 , 文章类型： Article，,卷期：2012年84-2] Photoirradiation of 1-ethoxy-2-phenylindole in methanol and the reaction of 1-hydroxy-2-phenylindole with tosyl chloride produced 6-ethoxy- and 6-tosyloxy-2-phenylindoles, respectively, as minor products. The latter was ... FIRST SYNTHESIS OF A NATURAL ISOXANTHOPTERIN GLYCOSIDE, ASPEROPTERIN-A [作者：HANAYA TADASHI; EJIRI KAZUMASA; YAMAMOTO HIROSHI,期刊：Heterocycles, 页码：801-813 , 文章类型： Article，,卷期：2012年84-2] The key precursor, N-2-(N,N-dimethylaminomethylene)-6-hydroxymethy1-8-methyl-3[2-(4-nitroph enypethyl]-7-xanthopterin (9) was efficiently prepared from 2,5-diamino-6-methylam1no-3H-pyrimidin-4-one (3) and ethyl 3-(tert-b... SYNTHESIS AND PROPERTIES OF UNSYMMETRICAL N,N '-DIALKYLTERRYLENEBIS(DICARBOXIMIDE) DERIVATIVES AND THEIR RELATED DERIVATIVES [作者：NAGAO YUKINORI; IWANO TOMOHIRO; HIRANO MAKI; ARIMITSU KOJI; KOZAWA KOZO,期刊：Heterocycles, 页码：815-828 , 文章类型： Article，,卷期：2012年84-2] Terrylene derivatives have optical absorptions in the longer wavelength region than the perylene dyes and an unsymmetrical terrylene derivatives are expected to have an improved orientation and solubility. Unsymmetrical ... FASILE SYNTHESIS OF 4,9-DIHYDRO-2H-BENZ[f]- AND 4,11-DIHYDRO-2H-NAPHTH[2,3-f]-ISOINDOLES AND THEIR UTILITY FOR PORPHYRIN SYNTHESIS [作者：CAI CHENXIN; UOYAMA HIROKI; NAKAMURA MITSUNORI; UNO HIDEMITSU,期刊：Heterocycles, 页码：829-841 , 文章类型： Article，,卷期：2012年84-2] Esters of 4,9-dihydro-2H-benz[2,3-f] isoindole-1-carboxylate and 4,11-dihydro-2H-naphth[2,3-f]isoindole-1-carboxylate were prepared by the modified Barton-Zard reaction of 2,3-bis(phenylsulfonyl)-1,2,3,4-tetrahydro-napht... DEVELOPMENT OF AN INTRAMOLECULAR GASSMAN'S [2+2] CYCLOADDITION [作者：FELTENBERGER JOHN B; KO CHANGHONG; DENG JUN; GHOSH SUNIL K; HSUNG RICHARD P,期刊：Heterocycles, 页码：843-878 , 文章类型： Article，,卷期：2012年84-2] The development of an intramolecular variant of Gassman's cationic [2 + 2] cycloaddition is described herein. Mechanistic aspects of the stepwise nature of this cycloaddition process between vinyl acetals and unactivated... CATALYTIC ASYMMETRIC AMINATION OF OXINDOLES UNDER DINUCLEAR NICKEL SCHIFF BASE CATALYSIS [作者：MOURI SHINSUKE; CHEN ZHIHUA; MATSUNAGA SHIGEKI; SHIBASAKI MASAKATSU,期刊：Heterocycles, 页码：879-892 , 文章类型： Article，,卷期：2012年84-2] Catalytic asymmetric synthesis of 3-aminooxindoles with a tetrasubstituted carbon stereocenter is described. 1 mol% of homobimetallic (R)-Ni-2-Schiff base complex 1 catalyzed asymmetric amination of 3-alkyl-substituted o... EXPEDIENT SYNTHESIS OF 3,4-DIHYDROQUINAZOLINES VIA TANDEM ADDITION-CONJUGATE ADDITION CYCLIZATION OF CARBODIIMIDES BEARING A MICHAEL ACCEPTOR [作者：SAITO TAKAO; NAKANO HAYATO; TERADA HIDENORI; KUTSUMURA NORIKI; OTANI TAKASHI,期刊：Heterocycles, 页码：893-911 , 文章类型： Article，,卷期：2012年84-2] Michael acceptor-possessing N-phenylcarbodiimides, which were prepared by an aza-Wittig reaction of the corresponding functionalized iminophosphoranes with aromatic and aliphatic isocyanates, reacted with enolate carbon-... C-[o-(p-TOLYL)SULFINYL]PHENYLNITRONES. SYNTHESIS AND REACTIVITY IN [3+2] DIPOLAR CYCLOADDITIONS [作者：GARCIA RUANO JOSE LUIS; FRAILE ALBERTO; NUNEZ ALBERTO; ROSARIO MARTIN M; ALONSO INES,期刊：Heterocycles, 页码：913-928 , 文章类型： Article，,卷期：2012年84-2] The synthesis of the title compounds and the results obtained in their reactions with different dipolarophiles is presented. Alkylidene malonates afford the best conversions and stereoselectivities, providing enantiomeri... ASYMMETRIC SYNTHESIS OF 2-PROPYLISOFAGOMINE USING ALLYLIC HYDROXY GROUP ACCELERATED RING-CLOSING ENYNE METATHESIS [作者：TAGUCHI TATSUYA; IMAHORI TATSUSHI; YOSHIMURA YUICHI; KATO ATSUSHI; ADACHI ISAO; KAWAHATA MASATOSHI; YAMAGUCHI KENTARO; TAKAHATA HIROKI,期刊：Heterocycles, 页码：929-944 , 文章类型： Article，,卷期：2012年84-2] An asymmetric synthesis of 2-propylisofagomine 5 using allylic hydroxy group accelerated ring-closing enyne metathesis (AHA-RCEM) was conducted with high diastereoselectivity in 13% overall yield starting from the commer... REACTIVITY OF N-ALKYLTHIIRANIMINES TOWARD SIMPLE NUCLEOPHILES AND ISO(THIO)CYANATES [作者：NIMMESGERN HILDEGARD; SCHAUMANN ERNST; ADIWIDJAJA GUNADI,期刊：Heterocycles, 页码：945-961 , 文章类型： Article，,卷期：2012年84-2] Hydrolysis of N-(1-dimethylcarbamoyl-1-methylethyl)-thiiranimines occurs with S-C(sp(2)) ring cleavage while attack of hydrochloric acid results in S-C(sp(3)) ring opening. The latter mode of ring opening is also observe... SYNTHESIS OF 6-HYDROXYISOCHROMENES AND 6-HYDROXYISOCOUMARINS FROM 3-ETHOXYCYCLOHEX-2-EN-1-ONE [作者：MAJETICH GEORGE; GROVE JEREMY L,期刊：Heterocycles, 页码：963-982 , 文章类型： Article，,卷期：2012年84-2] The synthesis of alkylated 6-hydroxyisochromenes and alkylated 6-hydroxyisocoumarins from 3-ethoxycyclohex-2-en-1-one was developed. The key reaction features a novel intramolecular hydroalkoxylation of a cyclohex-2-en-3... SYNTHESIS OF 8-HYDROXYISOCHROMENES AND 8-HYDROXYISOCOUMARINS FROM 3-ETHOXYCYCLOHEX-2-EN-1-ONE [作者：MAJETICH GEORGE; GROVE JEREMY L,期刊：Heterocycles, 页码：983-1012 , 文章类型： Article，,卷期：2012年84-2] Two strategies were developed to prepare 8-hydroxyisocoumarins from substituted 3-ethoxycyclohex-2-en-1-ones. The key reactions in the first strategy were the cyclization of a 2-hydroxymethy1-3-ethynyl-cyclohex-2-en-1-on... ALKYNE-ACETAL CYCLISATION REACTIONS MEDIATED BY FORMIC ACID; 3-ACYLATED-2,5-DIHYDROFURANS AND RELATED OXYGEN AND NITROGEN HETEROCYCLES [作者：CUTHBERTSON JAMES D; GODFREY ANDREW A; UNSWORTH WILLIAM P; TAYLOR RICHARD J K,期刊：Heterocycles, 页码：1013-1021 , 文章类型： Article，,卷期：2012年84-2] The utility of formic acid for the cyclisation of alkyne omega-acetals is described; the scope and limitations of this process are outlined and a range of acylated heterocyclic building blocks (2,5-dihydrofurans, 2,5-dih...