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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50条记录   PREPARATION AND OPTICAL AND ELECTROCHEMICAL PROPERTIES OF UNSYMMETRICAL PHTHALOCYANINES WITH ONE OR TWO TTF UNITS [作者：KIMURA TAKESHI; TAKAHASHI NOBUHIRO; TAJIMA TOMOYUKI; TAKAGUCHI YUTAKA,期刊：Heterocycles, 页码：333-337 , 文章类型： Article，,卷期：2012年84-1] Unsymmetrical phthalocyanines with one or two TTF units were obtained by treating mixed 3,6-dioctyltetrathiafluvalenophthalonitrile and 4,5-dioctoxyphthalonitrile with Li in n-hexanol. Their optical and electrochemical p... NI-CATALYZED MULTI-COMPONENT COUPLING REACTION OF NORBORNENE, DIMETHYLZINC, BUTADIENE, AND ALDIMINE [作者：NAKAMURA TOSHIYUKI; MORI TAKAMICHI; TOGAWA MARIKO; KIMURA MASANARI,期刊：Heterocycles, 页码：339-347 , 文章类型： Article，,卷期：2012年84-1] In the presence of a Ni catalyst and dimethylzinc, aldimines, which are prepared from aldehydes and primary amines, undergo a multi-component coupling reaction with 1,3-butadiene and norbornene to provide homoallylamines... CONDENSATION OF CATECHIN AND EPICATECHIN INCORPORATING A TBS-PROTECTING GROUP [作者：NAKAJIMA NORIYUKI; HORIKAWA KEIKO; TAKEKAWA NORIMASA; HAMADA MASAHIRO; KISHIMOTO TAKAO,期刊：Heterocycles, 页码：349-354 , 文章类型： Article，,卷期：2012年84-1] Stereoselective synthesis of catechin and epicatechin dimers incorporating a tert-butyldimethylsilyl (TBS)-protecting group under intermolecular condensation is achieved using SnCl4 as the Lewis acid. Four TBS-protected ... PALLADIUM-CATALYZED SELECTIVE AND SEQUENTIAL FUNCTIONALIZATION OF 2,4,6-TRIHALOPYRIDINE RINGS: SYNTHESIS OF ETHYNYLPYRIDINE POLYMERS DIRECTLY JOINED WITH AZA-CROWN ETHERS [作者：TAKASHIMA SHUNSUKE; YAMAMOTO TSUYOSHI; ABE HAJIME; INOUYE MASAHIKO,期刊：Heterocycles, 页码：355-360 , 文章类型： Article，,卷期：2012年84-1] meta-Ethynylpyridine polymer directly joined with 1-aza-18-crown-6 ether was synthesized by applying 2,4,6-trihalopyridines as a starting material. By using a Pd(OAc)(2)-BINAP combination with an excess of Cs2CO3, 2,6-di... OPTIMIZED SYNTHESES OF THE FURAN FATTY ACIDS F-5 AND F-6 FEATURING CONVERTION OF A beta-IODOFURAN INTO A beta-METHYLFURAN IN A SINGLE OPERATION [作者：KNIGHT DAVID W; SMITH ANDREW W T,期刊：Heterocycles, 页码：361-369 , 文章类型： Article，,卷期：2012年84-1] Optimized syntheses of the furan fatty acids F-5 1a and F-6 1b are described, which give >60% overall yields over 7 or 8 steps respectively starting from 10-undecenal 6. The F-6 approach also features a conversion of a b... HIGHLY EFFICIENT CONDENSATION OF GLYCEROL TO CYCLIC ACETALS CATALYZED BY TITANIUM-EXCHANGED MONTMORILLONITE [作者：MITSUDOME TAKATO; MATSUNO TSUYOSHI; SUEOKA SHOICHIRO; MIZUGAKI TOMOO; JITSUKAWA KOICHIRO; KANEDA KIYOTOMI,期刊：Heterocycles, 页码：371-376 , 文章类型： Article，,卷期：2012年84-1] Titanium cation-exchanged montmorillonite (Ti4+-mont) showed high catalytic activity for the condensation reaction of glycerol with ketones or aldehydes to provide cyclic acetals under mild conditions. The solid Ti4+-mon... ASYMMETRIC SYNTHESIS OF ISOQUINUCLIDINE BY DIELS-ALDER REACTION OF 1,2-DIHYDROPYRIDINE AND CHIRAL DIENOPHILE UTILIZING A CHIRAL LEWIS ACID [作者：HIRAMA MASAFUMI; SUTTIBUT CHONTICHA; HUTABARAT N D M ROMAULI; SEKI CHIGUSA; SAKUTA NORITAKA; TSUCHIYA TAKEFUMI; KOHARI YOSHIHITO; NAKANO HIROTO; UWAI KOJI; TAKANO NOBUHIRO; YASUI MITSUKUNI; OKUYAMA YUKO; OSONE KENICHI; TAKESHITA MITSUHIRO; MATSUYAMA HARUO,期刊：Heterocycles, 页码：377-384 , 文章类型： Article，,卷期：2012年84-1] The asymmetric Diels-Alder reaction of 1-phenoxycarbonyl-1,2-dihydropyridine l with 3-acryloyl (4S)-4-benzyl-1,3-oxazolidin-2-one (45)-2 {or (4R)-2} in the presence of Ti-TADDOLate 4 as a chiral Lewis acid afforded the c... ENANTIOENRICHED FORMATION OF SYNTHONS OF 1,5-HEXADIENE BIS-EPOXIDES FOR CONSTRUCTION OF NONRACEMIC CIS- AND TRANS-2,5-DISUBSTITUTED TETRAHYDROFURANS [作者：WILLIAMS DAVID R; DE RAMKRISHNA,期刊：Heterocycles, 页码：385-391 , 文章类型： Article，,卷期：2012年84-1] A pathway for the synthesis of enantioenriched his-epoxides derived from 2,6-heptadien-1-ol is described. Use of the Katsuki titanium salalen catalyst affords high asymmetric induction for mild epoxidation of the monosub... [3+2] CYCLOADDITION OF SELENO- AND THIOALDEHYDES WITH CYCLIC AZOMETHINE IMINES [作者：MAEDA HAJIME; TAKAMIZAWA YUSUKE; SEGI MASAHITO,期刊：Heterocycles, 页码：393-400 , 文章类型： Article，,卷期：2012年84-1] Reaction of seleno- and thioaldehydes with cyclic azomethine imines in refluxing toluene gave [3+2] cycloadducts as a diastereomeric pure form in high yields. Thermal cycloreversion of the [3+2] cycloadducts regioselecti... DESIGN AND SYNTHESIS OF G-QUADRUPLEX LIGANDS BEARING MACROCYCLIC HEXAOXAZOLES WITH FOUR-WAY SIDE CHAINS [作者：IIDA KEISUKE; MAJIMA SATOKI; OHTAKE TERUMI; TERA MASAYUKI; SHINYA KAZUO; NAGASAWA KAZUO,期刊：Heterocycles, 页码：401-411 , 文章类型： Article，,卷期：2012年84-1] Macrocyclic hexaoxazole compounds bearing four-way side chains L2H2-(4M)6OTD derivatives 3 and 4 were synthesized as new G-quadruplex ligands. Stabilization of G-quadruplex forming oligonucleotides in human telomeres, c-... REACTIONS OF AN OVERCROWDED SILYLENE WITH PYRIDINES: FORMATION OF A NOVEL 2H-1,2-AZASILEPINE AND ITS FURTHER CYCLOADDITION [作者：MIZUHATA YOSHIYUKI; SATO TAKAHIRO; TOKITOH NORIHIRO,期刊：Heterocycles, 页码：413-418 , 文章类型： Article，,卷期：2012年84-1] The reactions of an overcrowded silylene [Tbt(Mes)Si:] with two types of pyridines were performed. In the case using pyridine, a unique 2:2 adduct bearing five, six, and seven-membered rings was obtained. On the other ha... DEUTERIUM-LABELED BENZYLADENINE: SYNTHESIS AND APPLICATION AS A SURROGATE [作者：MODUTLWA NKAELANG; TADA HIROYUKI; SUGAHARA YOSHIKI; SHIRAKI KOICHI; HARA NOBUYUKI; DEYASHIKI YOSHIHIRO; MAEGAWA TOMOHIRO; MONGUCHI YASUNARI; SAJIKI HIRONAO,期刊：Heterocycles, 页码：419-429 , 文章类型： Article，,卷期：2012年84-1] N-6-Benzyladenine (benzyladenine), a plant growth regulator, was efficiently deuterated by the hydrogen deuterium (H D) exchange reaction catalyzed by palladium on carbon-ethylenediamine complex [Pd/C(en)], while use of ... SYNTHESIS OF STEREODEFINED 3,4-DISUBSTITUTED PIPERIDINES THROUGH REARRANGEMENT OF 2-(2-BROMO-1,1-DIMETHYLETHYL)AZETIDINES [作者：MOLLET KAREN; BROECKX LEEN; DHOOGHE MATTHIAS; DE KIMPE NORBERT,期刊：Heterocycles, 页码：431-447 , 文章类型： Article，,卷期：2012年84-1] cis-2-(2-Bromo-1,1-dimethylethyl)azetidines, synthesized by monochloroalane reduction of the corresponding beta-lactams, were shown to be excellent building blocks for the synthesis of stereodefined 4-bromo-, 4-fluoro-, ... ENAMINO ESTERS IN THE SYNTHESIS OF HETEROCYCLIC SYSTEMS. TRANSFORMATION OF DIMETHYL ACETONE-1,3-DICARBOXYLATE INTO POLYSUBSTITUTED 1,6-NAPHTHYRIDINE-8-CARBOXYLATES [作者：SPORAR JOZE; BEZENSEK JURE; URSIC UROS; GOLOBIC AMALIJA; SVETE JURIJ; STANOVNIK BRANKO,期刊：Heterocycles, 页码：449-459 , 文章类型： Article，,卷期：2012年84-1] A simple two-step synthesis of 1,6-naphthyridine derivatives is described. Methyl 2-(2-methoxy-2-oxoethyl)-6-oxo-1,6-dihydropyridine-3-carboxylate (3), prepared from dimethyl acetone-1,3-dicarboxylate (1) and propyolic a... SYNTHESIS OF BENZOTROPONE-ANNULATED 1-AZAAZULENES AND RELATED COMPOUNDS BY SUZUKI-MIYAURA COUPLING/ALDOL CONDENSATION CASCADE REACTION AND EVALUATIONS OF THEIR CYTOTIXIC ACTIVITY AGAINST HELA S3 CELLS [作者：NAKATANI MAKOTO; FUJII HIROYUKI; MURAFUJI TOSHIHIRO; GUNJI TAKAHIRO; IKEDA REIKO; KONAKAHARA TAKEO; ABE NORITAKA,期刊：Heterocycles, 页码：461-472 , 文章类型： Article，,卷期：2012年84-1] One-pot Suzuki-Miyaura coupling/aldol condensation cascade reactions of 3-acetyl-2-bromo-1-azaazulene (1b) with 2-formylphenylboronic acid and the reaction of 2-bromo-3-formyl-1-azaazulene (6b) with 2-acetylphenylboronic... MODEL STUDIES TOWARDS THE TOTAL SYNTHESIS OF THE STEMONA ALKALOID 1-HYDROXYPROTOSTEMONINE: SYNTHESIS OF ENT-1-HYDROXYSTEMOAMIDE [作者：SWAMY NALIVELA KUMARA; PYNE STEPHEN G,期刊：Heterocycles, 页码：473-492 , 文章类型： Article，,卷期：2012年84-1] As part of a model study towards the total synthesis of Stemona alkaloid 1-hydroxyprotostemonine 1, we have achieved the synthesis an A-B-C ring precursor, ent-1-hydroxystemoamide. Key steps involve an ene-yne RCM reacti...