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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83条记录   Push-Pull Aminobithiophenes - Highly Fluorescent Stable Fluorophores [作者：DONG YANMEI; BOLDUC ANDREANNE; MCGREGOR NICHOLAS; SKENE W G,期刊：Organic Letters, 页码：1844-1847 , 文章类型： Article，,卷期：2011年13-7] Stable 2-aminobithiophenes were prepared using the Gewald reaction. The resulting push pull bithiophenes exhibited both unprecedented high fluorescence yields and stability in addition to demonstrating fluorescence on-of... Ring-Enlargement Reactions of Donor - Acceptor-Substituted Cyclopropanes: Which Combinations are Most Efficient? [作者：SCHNEIDER TOBIAS F; WERZ DANIEL B,期刊：Organic Letters, 页码：1848-1851 , 文章类型： Article，,卷期：2011年13-7] A detailed theoretical study of ring-enlargement reactions of 72 differently substituted donor-acceptor-substituted cyclopropanes Is presented. Transition states, activation barriers, and, for representative examples, th... Direct Alkylation of Heteroaryls Using Potassium Alkyl- and Alkoxymethyltrifluoroborates [作者：MOLANDER GARY A; COLOMBEL VIRGINIE; BRAZ VALERIE A,期刊：Organic Letters, 页码：1852-1855 , 文章类型： Article，,卷期：2011年13-7] A direct alkylation of various heteroaryls using stoichiometric potassium alkyl- and alkoxymethyltrifluoroborates has been developed. This method leads to the synthesis of complex substituted heterocycles, which have bee... Enantiodifferentiating Photoisomerization of (Z,Z)-1,3-Cyclooctadiene Included and Sensitized by Naphthoyl-Curdlan [作者：FUKUHARA GAKU; IMAI MAMI; YANG CHENG; MORI TADASHI; INOUE YOSHIHISA,期刊：Organic Letters, 页码：1856-1859 , 文章类型： Article，,卷期：2011年13-7] 6-O-(2-Naphthoyl)curdlan was newly synthesized as a sensitizing polysaccharide host to examine the chiroptical properties, supramolecular complexation, and photochirogenic behavior with (Z,Z)-1,3-cyclooctadiene (1ZZ). Th... Chiral Phosphoric Acid Catalyzed Enantioselective Synthesis of beta-Amino-alpha, alpha-difluoro Carbonyl Compounds [作者：KASHIKURA WATARU; MORI KEIJI; AKIYAMA TAKAHIKO,期刊：Organic Letters, 页码：1860-1863 , 文章类型： Article，,卷期：2011年13-7] A biphenol-based chiral phosphoric acid bearing a 9-anthryl group at each of the 3,3'-positions catalyzed the asymmetric Mannich-type reaction of N-Boc Imine with difluoroenol silyl ethers In the presence of MS3A In THF ... Defensive Sesterterpenoids with Unusual Antipodal Cyclopentenones from the Leaves of Leucosceptrum canum [作者：LUO SHIHONG; WENG LINHONG; XIE MINGJIN; LI XIAONIAN; HUA JUAN; ZHAO XU; LI SHENGHONG,期刊：Organic Letters, 页码：1864-1867 , 文章类型： Article，,卷期：2011年13-7] Two novel sesterterpenoids, leucosceptroids C (1) and D (2), possessing unusual antipodal cyclopentenones while maintaining the stereochemistry and functionality of the tricyclic cores, were discovered from the leaves of... Enantio- and Diastereoselective Synthesis of (E)-1,5-syn-Diols: Application to the Synthesis of the C(23)-C(40) Fragment of Tetrafibricin [作者：KISTER JEREMY; NUHANT PHILIPPE; LIRA RICARDO; SORG ACHIM; ROUSH WILLIAM R,期刊：Organic Letters, 页码：1868-1871 , 文章类型： Article，,卷期：2011年13-7] A highly stereoselective synthesis of (E)-1,5-syn-diols 6 Is described. The kinetically controlled hydroboration of allenyltrifluoroborate 8 with Soderquist borane 2 provides the (Z)-allylic trifluoroborate 9, which unde... Gold-Catalyzed Direct Amination of Arenes with Azodicarboxylates [作者：GU LIUQUN; NEO BOON SIONG; ZHANG YUGEN,期刊：Organic Letters, 页码：1872-1874 , 文章类型： Article，,卷期：2011年13-7] Gold(III) chloride catalyzed direct amination of arenes with azodicarboxylates was developed. The new catalytic system was active to a broad range of substrates, and the reaction was carried out under mild conditions. It... Carboxylate-Assisted Ruthenium-Catalyzed Direct Alkylations of Ketimines [作者：ACKERMANN LUTZ; HOFMANN NORA; VICENTE RUBEN,期刊：Organic Letters, 页码：1875-1877 , 文章类型： Article，,卷期：2011年13-7] The mechanism of carboxylate-assisted ruthenium(II)-catalyzed direct aikylations of ketimines with unactivated alkyl halides was probed through experimental studies. The remarkable chemoselectivity of the broadly applica... Stereoselective Direct Amine-Catalyzed Decarboxylative Aldol Addition [作者：ROHR KERSTIN; MAHRWALD RAINER,期刊：Organic Letters, 页码：1878-1880 , 文章类型： Article，,卷期：2011年13-7] A stereoselective decarboxylative aldol addition of beta- and alpha-keto acids in the presence of catalytic amounts of amines is described. By the optional deployment of chiral enolizable aldehydes an access to enantiopu... Highly Enantioselective Hydrogenation of Styrenes Directed by 2 '-Hydroxyl Groups [作者：WANG XIANG; GURAM ANIL; CAILLE SEB; HU JACK; PRESTON J P; RONK MICHAEL; WALKER SHAWN,期刊：Organic Letters, 页码：1881-1883 , 文章类型： Article，,卷期：2011年13-7] A new synthetic strategy that turns styrene-type olefins into excellent substrates for Rh-catalyzed asymmetric hydrogenation by Installing a 2'-hydroxyl substituent is described. This methodology accommodates trisubstitu... Unprecedented Noncatalyzal anti-Carbozincation of Diethyl Acetylenedicarboxylate through Alkylzinc Group Radical Transfer [作者：MAURY JULIEN; FERAY LAURENCE; BERTRAND MICHELE P,期刊：Organic Letters, 页码：1884-1887 , 文章类型： Article，,卷期：2011年13-7] The radical carbozincation of diethyl acetylenedicarboxylate, performed at room temperature in the presence of air, leads to fumaric derivatives through a selective alkylzinc group radical transfer controlled by coordina... Palladium-Catalyzed Oxidative Allylic C-H Silylation [作者：LARSSON JOHANNA M; ZHAO TONY S N; SZABO KALMIN J,期刊：Organic Letters, 页码：1888-1891 , 文章类型： Article，,卷期：2011年13-7] Palladium-catalyzed allylic C-H silylation was performed with use of hexamethyldisilane as the silyl source. These C-H functionalization reactions occur only in the presence of hypervalent iodine reagents or other strong... A Photocycloaddition/Fragmentation Approach toward the 3,12-Dioxatricyclo[8.2.1.0(6,13)]tridecane Skeleton of Terpenoid Natural Products [作者：HEHN JOERG P; HERDTWECK EBERHARDT; BACH THORSTEN,期刊：Organic Letters, 页码：1892-1895 , 文章类型： Article，,卷期：2011年13-7] Starting from tetronate 1 (R = CH2OH), a short photochemical access to the 3,12-dioxatricyclo[8.2.1.0(6,13)]tridecane-skeleton 2 of briarellin and asbestinin diterpenes has been explored. In the course of these studies, ... Dynamic Kinetic Resolution of Azlactones Catalyzed by Chiral Bronsted Acids (vol 13, pg 356, 2011) [作者：LU GUOJIAN; BIRMAN VLADIMIR B,期刊：Organic Letters, 页码：1896-1896 , 文章类型： Correction，,卷期：2011年13-7] Direct Enantioselective Aldol-Tishchenko Reaction Catalyzed by Chiral Lithium Diphenylbinaphtholate [作者：ICHIBAKASE TOMONORI; NAKAJIMA MAKOTO,期刊：Organic Letters, 页码：1579-1581 , 文章类型： Article，,卷期：2011年13-7] Chiral lithium diphenylbinaphtholate is an effective catalyst for the enantioselective aldol-Tishchenko reaction, affording 1,3-diol derivatives with three contiguous chiral centers and high stereoselectivities. Successi...