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Stereo-controlled synthesis of polyheterocycles via diene-transmissive hetero-Diels-Alder reaction of [small beta],[gamma]-unsaturated [small alpha]-keto esters

Org. and Biomol. Chem. - 18 April, 2015 - 05:17
Org. Biomol. Chem., 2015, Accepted Manuscript
DOI: 10.1039/C5OB00503E, CommunicationTakashi Otani, Yumiko Tamai, Kazunori Seki, Tomohiro Kikuchi, Taiichiro Miyazawa, Takao Saito
We describe the stereoselective synthesis of polyring fused heterocyclic compounds based on diene-transmissive hetero-Diels-Alder reactions utilizing [small beta],[gamma]-unsaturated [small alpha]-keto esters. This protocol consists of initial endo- or exo-selective DA reactions with...
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High Solid-State Luminescence in Propeller-Shaped AIE-active Pyridine-Ketoiminate-Boron Complexes

Org. and Biomol. Chem. - 18 April, 2015 - 05:17
Org. Biomol. Chem., 2015, Accepted Manuscript
DOI: 10.1039/C5OB00607D, PaperZhipeng Liu, Yanping Wu, Zhenyu Li, Qingsong Liu, Xiaoqing Wang, Hui Yan, Shuwen Gong, Weijiang He
Two pyridine-ketoiminate-based organoboron complexes (2 and 3) were developed. 2 and 3 showed very weak emission in low-viscosity organic solvents because of the intramolecular rotation induced non-radiative process. Their emission...
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Indium-Catalyzed Oxidative Cross-Dehydrogenative Coupling of Chromenes with 1,3-Dicarbonyls and Aryl Rings

Org. and Biomol. Chem. - 18 April, 2015 - 05:17
Org. Biomol. Chem., 2015, Accepted Manuscript
DOI: 10.1039/C5OB00277J, PaperLei Liu, Fanmei Li, Zhilin Meng, Jing Hua, Wei Li, Hongxiang Lou
An effective indium-catalyzed oxidative cross-dehydrogenative coupling of electronically varied chromenes with 1,3-dicarbonyl compounds and aryl rings has been established. Both the C-H alkylation and arylation proceed smoothly at room temperature...
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Organocatalytic Regioselective Asymmetric Michael Addition of Azlactones to o-Hydroxy Chalcone Derivatives

Org. and Biomol. Chem. - 18 April, 2015 - 05:17
Org. Biomol. Chem., 2015, Accepted Manuscript
DOI: 10.1039/C5OB00121H, PaperShao-Yun Zhang, Gui-Yu Ruan, Zhi-Cong Geng, Nai-Kai Li, Ming Lv, Yong Wang, Xingwang Wang
The regioselective Michael addition between azlactones with o-hydroxy chalcone derivatives is reported. Enantiomerically enriched N, O-aminals with two continuous stereogenic centers are exclusively obtained in moderate to good yields with...
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Novel Protocol for the Stereoselective Construction of Functionalized Tetra and Pentacyclic Coumarinopyran Pyrazole / Pyrimidinedione / Coumarin Scaffolds Using Solid State Melt Reaction

Org. and Biomol. Chem. - 18 April, 2015 - 05:17
Org. Biomol. Chem., 2015, Accepted Manuscript
DOI: 10.1039/C5OB00442J, CommunicationManickam Bakthadoss, Damodharan Kannan, Nagappan Sivakumar, Palani Malathi, Vasudevan Manikandan
An efficient assembly of diversified tetra and pentacyclic hybrid scaffolds has been established using a novel solid state melt reaction (SSMR) for the first time. These privileged hybrid heterocyclic entities...
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Resveratrol-Based Benzoselenophenes with Enhanced Antioxidant and Chain Breaking Capacity

Org. and Biomol. Chem. - 18 April, 2015 - 05:17
Org. Biomol. Chem., 2015, Accepted Manuscript
DOI: 10.1039/C5OB00193E, PaperDamiano Tanini, Lucia Panzella, Riccardo Amorati, Antonella Capperucci, Elio Pizzo, Alessandra Napolitano, Stefano Menichetti, Marco d'Ischia
This is an Accepted Manuscript, which has been through the RSC Publishing peer review process and has been accepted for publication. Accepted manuscripts are published online shortly after acceptance. This version of the article will be replaced by the fully edited, formatted and proof read Advance Article as soon as this is available.
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Asymmetric Michael addition reactions of nitroalkanes to 2-furanones catalyzed by bifunctional thiourea catalysts

Org. and Biomol. Chem. - 18 April, 2015 - 05:17

Org. Biomol. Chem., 2015, Advance Article
DOI: 10.1039/C5OB00708A, CommunicationZhushuang Bai, Ling Ji, Zemei Ge, Xin Wang, Runtao Li
The first bifunctional thiourea catalyzed asymmetric Michael addition reactions of nitroalkanes to 2-furanones are described.
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Synthesis of new carolacton derivatives and their activity against biofilms of oral bacteria

Org. and Biomol. Chem. - 18 April, 2015 - 05:17
Org. Biomol. Chem., 2015, Accepted Manuscript
DOI: 10.1039/C5OB00460H, PaperAndreas Kirschning, Irene Wagner-Dobler, Meike Stiesch, Jonas Ammermann, Thomas Schmidt, Gerald Drager, Nico Stumpp, Michael Reck, Priyanka Premnath, Rolf Jansen
Carolacton, a secondary metabolite isolated from the extracts of Sorangium cellulosum, causes membrane damage and cell death in biofilms of the caries- and endocarditis-associated bacterium Streptococcus mutans. Here, we report...
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Copper-catalyzed cascade addition/cyclization: highly efficient access to phosphonylated quinoline-2,4(1H,3H)-diones

Org. and Biomol. Chem. - 18 April, 2015 - 05:17

Org. Biomol. Chem., 2015, Advance Article
DOI: 10.1039/C5OB00617A, CommunicationYa-Min Li, Shi-Sheng Wang, Fuchao Yu, Yuehai Shen, Kwen-Jen Chang
A novel Cu-catalyzed addition/cyclization cascade of o-cyanoarylacrylamide has been developed for the synthesis of various phosphonylated quinoline-2,4(1H,3H)-diones.
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Synthesis of naked amino-pyrroloindoline via direct aminocyclization of tryptamine

Org. and Biomol. Chem. - 18 April, 2015 - 05:17

Org. Biomol. Chem., 2015, Advance Article
DOI: 10.1039/C5OB00546A, CommunicationZhigao Shen, Zilei Xia, Huijun Zhao, Jiadong Hu, Xiaolong Wan, Yisheng Lai, Chen Zhu, Weiqing Xie
Direct access to unprotected amino-pyrroloindoline via aminocyclization of tryptamine and tryptophan catalyzed by Rh2(esp)2 has been described using O-(2,4-dinitrophenyl)hydroxylamine (DPH) as the nitrogen source.
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Galacto configured N-aminoaziridines: a new type of irreversible inhibitors of [small beta]-galactosidases

Org. and Biomol. Chem. - 18 April, 2015 - 05:17
Org. Biomol. Chem., 2015, Accepted Manuscript
DOI: 10.1039/C5OB00532A, PaperAmadeu Llebaria, Anna Alcaide, Ana Trapero, Yolanda Perez
A new type of galactose mimetics has been synthesized following a straighforward synthetic approach based on cyclohexene olefin aziridination reactions directed by hydroxyl substituents. These enantiomerically pure galacto-configured N-aminoaziridines are...
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Silver salts and DBU cooperatively catalyzed nucleophilic addition/cyclization of propargylic alcohols with trifluoromethyl ketones

Org. and Biomol. Chem. - 18 April, 2015 - 05:17

Org. Biomol. Chem., 2015, Advance Article
DOI: 10.1039/C5OB00438A, PaperJingjing Wang, Wei-Guang Kong, Feng Li, Jie Liu, Qin Shen, Lantao Liu, Wen-Xian Zhao
A general and efficient synthesis of trifluoromethyl substituted 5-alkylidene-1,3-dioxolane using a silver salt and DBU cooperatively catalyzed nucleophilic addition/cyclization of propargylic alcohols and trifluoromethyl ketones is described.
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Heteroatom-substituted tetra(3,4-pyrido)porphyrazines: a stride toward near-infrared-absorbing macrocycles

Org. and Biomol. Chem. - 18 April, 2015 - 05:17

Org. Biomol. Chem., 2015, Advance Article
DOI: 10.1039/C5OB00651A, CommunicationLenka Vachova, Miloslav Machacek, Radim Kucera, Jiri Demuth, Pavel Cermak, Kamil Kopecky, Miroslav Miletin, Adela Jedlickova, Tomas Simunek, Veronika Novakova, Petr Zimcik
Synthesis and photophysical properties are reported for substituted tetra(3,4-pyrido)porphyrazines that absorb light as far as at 800 nm.
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Enantioselective synthesis of chiral heterocycles containing both chroman and pyrazolone derivatives catalysed by a chiral squaramide

Org. and Biomol. Chem. - 18 April, 2015 - 05:17

Org. Biomol. Chem., 2015, Advance Article
DOI: 10.1039/C4OB02653E, PaperJun-Hua Li, Da-Ming Du
An efficient chiral squaramide-catalysed enantioselective Michael addition of pyrazolin-5-ones to 3-nitro-2H-chromenes afforded chiral heterocycles containing both chroman and pyrazolone derivatives in high to excellent yields (up to 98%) with high enantioselectivities (up to 96%) under very low catalyst loading (0.2 mol%).
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Kinetic resolution of primary allylic amines via palladium-catalyzed asymmetric allylic alkylation of malononitriles

Org. and Biomol. Chem. - 18 April, 2015 - 05:17

Org. Biomol. Chem., 2015, Advance Article
DOI: 10.1039/C5OB00671F, CommunicationYong Wang, Ya-Nan Xu, Guo-Sheng Fang, Hong-Jian Kang, Yonghong Gu, Shi-Kai Tian
A new strategy has been developed for the catalytic kinetic resolution of primary allylic amines via enantioselective C-N bond cleavage.
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Cu(I)/TF-BiphamPhos-catalyzed asymmetric Michael addition of cyclic ketimino esters to alkylidene malonates

Org. and Biomol. Chem. - 18 April, 2015 - 05:17

Org. Biomol. Chem., 2015, Advance Article
DOI: 10.1039/C5OB00591D, PaperZhi-Yong Xue, Zhi-Min Song, Chun-Jiang Wang
Cu(I)-catalyzed asymmetric Michael addition of cyclic ketimino esters with alkylidene malonates has been developed for efficient construction of [small beta]-branched [small alpha]-amino acids containing adjacent quaternary and tertiary stereogenic centers in good yields with excellent diastereo-/enantioselectivities.
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Rhodium-catalyzed annulation between 2-arylimidazo[1,2-a]pyridines and alkynes leading to pyrido[1,2-a]benzimidazole derivatives

Org. and Biomol. Chem. - 18 April, 2015 - 05:17

Org. Biomol. Chem., 2015, Advance Article
DOI: 10.1039/C5OB00450K, CommunicationHaibo Peng, Jin-Tao Yu, Yan Jiang, Lei Wang, Jiang Cheng
A rhodium-catalyzed annulation between 2-arylimidazo[1,2-a]pyridines and alkynes was developed, leading to pyrido[1,2-a]benzimidazole derivatives in moderate to excellent yields.
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Alkynylation of steroids via Pd-free Sonogashira coupling

Org. and Biomol. Chem. - 18 April, 2015 - 05:17

Org. Biomol. Chem., 2015, Advance Article
DOI: 10.1039/C5OB00559K, PaperYury N. Kotovshchikov, Gennadij V. Latyshev, Nikolay V. Lukashev, Irina P. Beletskaya
A new biligand catalytic system was applied for the Pd-free Sonogashira syntheses of valuable steroidal enynes.
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The effect of terminal groups of viologens on their binding behaviors and thermodynamics upon complexation with sulfonated calixarenes

Org. and Biomol. Chem. - 18 April, 2015 - 05:17

Org. Biomol. Chem., 2015, Advance Article
DOI: 10.1039/C5OB00053J, PaperKui Wang, Si-Yang Xing, Xiu-Guang Wang, Hong-Xi Dou
The effect of terminal groups of viologens on their binding behaviors with sulfonated calixarenes was systematically studied in this study.
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Gold(I)-catalyzed hydroindolylation of allenyl ethers

Org. and Biomol. Chem. - 18 April, 2015 - 05:17

Org. Biomol. Chem., 2015, Advance Article
DOI: 10.1039/C5OB00635J, CommunicationChandrababu Naidu Kona, Mahesh H. Shinde, Chepuri V. Ramana
Nucleophilicity game: the gold(I)-catalyzed reaction/rearrangement of allenyl ethers has been investigated in the presence of indoles. The reaction outcome seems to be decided mainly by the nature of the pendant group of allenyl ether. Control experiments are indicative of an inner sphere mechanism for the hydroindolylation reaction.
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