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1.532 Aktuelle Fachpublikationen zum Thema Addition

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On the association of neutral and cationic tris(tetrathiafulvaleno)dodecadehydro[18]annulenes

24.11.2015 | Christian R. Parker; Kasper Lincke; Mikkel A. Christensen; Karol Lušpai; Peter Rapta; Thomas Just Sørensen; Thorbjør ..., Organic & Biomolecular Chemistry, 2015

Here, we report the first X-ray crystal structure of a tetrathiafulvalene-fused dehydroannulene with peripheral ethylthio substituents. In addition, we have subjected this compound to electrochemical and UV-Vis-NIR/ESR spectroelectrochemical studies to elucidate the degree to which the oxidised ...


Type II Anion Relay Chemistry: Exploiting Bifunctional Weinreb Amide Linchpins for the One‐Pot Synthesis of Differentiated 1,3‐Diketones, Pyrans, and Spiroketals

20.11.2015 | Mark Farrell, Bruno Melillo, Amos B. Smith, Angewandte Chemie International Edition, 2015

Abstract The design, synthesis, and validation of new highly effective bifunctional linchpins for type II anion relay chemistry (ARC) has been achieved. The mechanistically novel negative‐charge migration that comprises the Brook rearrangement is now initiated by a stabilized tetrahedral ...


ChemInform Abstract: Synthesis of Small 3‐Fluoro‐ and 3,3‐Difluoropyrrolidines Using Azomethine Ylide Chemistry.

19.11.2015 | Indrawan McAlpine, et al., ChemInform, 2015

Abstract A 1,3‐dipolar cycloaddition of an azomethine ylide with vinyl difluorides leads to 3,3‐difluoropyrrolidines.


Click Chemistry Applied to the Synthesis of Salmonella Typhimurium O-Antigen Glycoconjugate Vaccine on Solid Phase with Sugar Recycling

18.11.2015 | Giuseppe Stefanetti; Allan Saul; Calman A. MacLennan; Francesca Micoli, Bioconjugate Chemistry, 2015

A solid-phase conjugation method was developed and applied to the synthesis of an O-antigen based glycoconjugate vaccine against Salmonella Typhimurium, with CRM197 as the carrier protein. Copper-free click chemistry was used as the conjugation chemistry, after derivatizing the sugar and the ...


Investigation of a Late‐Stage Derivatiza­tion Approach to Isatogens: Discovery of New Reaction Pathways

17.11.2015 | Steven J. Edeson, Elvis J. M. Maduli, Stephen Swanson, Panayiotis A. Procopiou, Joseph P. A. Harrity, European Journal of Organic Chemistry, 2015

Abstract We have developed a new strategy for preparing 2‐substituted indolone N‐oxides (isatogens) by substitution reactions with aryl‐ and alkyl‐organometallic reagents. This approach allows a range of substituents to be incorporated at a late stage and complements existing methods that ...


Copper-catalyzed electrophilic amination using N-methoxyamines

17.11.2015 | Yutaro Fukami; Takamasa Wada; Tatsuhiko Meguro; Noritaka Chida; Takaaki Sato, Organic & Biomolecular Chemistry, 2015

Copper-catalyzed electrophilic amination of a triarylboroxin using an N-methoxyamine to give quick access to a variety of anilines was reported. The reaction was especially useful for syntheses of functionalized anilines when combined with our previously reported nucleophilic addition to ...


Well‐controlled ATRP of 2‐(2‐(2‐azidoethyoxy)ethoxy)ethyl methacrylate for high‐density click functionalization of polymers and metallic substrates

12.11.2015 | Pingsheng Liu, Jie Song, Journal of Polymer Science Part A: Polymer Chemistry, 2015

ABSTRACT The combination of atom transfer radical polymerization (ATRP) and click chemistry has created unprecedented opportunities for controlled syntheses of functional polymers. ATRP of azido‐bearing methacrylate monomers (e.g., 2‐(2‐(2‐azidoethyoxy)ethoxy)ethyl methacrylate, AzTEGMA), ...


Molcas 8: New capabilities for multiconfigurational quantum chemical calculations across the periodic table

12.11.2015 | Francesco Aquilante, Jochen Autschbach, Rebecca K. Carlson, Liviu F. Chibotaru, Mickaël G. Delcey, Luca De Vico, Ign ..., Journal of Computational Chemistry, 2015

In this report, we summarize and describe the recent unique updates and additions to the Molcas quantum chemistry program suite as contained in release version 8. These updates include natural and spin orbitals for studies of magnetic properties, local and linear scaling methods for the ...


Enantioselective Nanoporous Carbon Based on Chiral Ionic Liquids

11.11.2015 | Ido Fuchs, Nina Fechler, Markus Antonietti, Yitzhak Mastai, Angewandte Chemie International Edition, 2015

Abstract One of the greatest challenges in modern chemical processing is to achieve enantiospecific control in chemical reactions using chiral media such as chiral mesoporous materials. Herein, we describe a novel and effective synthetic pathway for the preparation of enantioselective ...


Frustrated Lewis Pair Chemistry Derived from Bulky Allenyl and Propargyl Phosphanes

11.11.2015 | Christoph Rosorius, Jennifer Möricke, Birgit Wibbeling, Alison C. McQuilken, Timothy H. Warren, Constantin G. Danili ..., Chemistry - A European Journal, 2015

Abstract The dimesitylpropargylphosphanes mes2PCH2CCR 6 a (R=H), 6 b (R=CH3), 6 c (R=SiMe3) and the allene mes2PC(CH3)CCH2 (8) were reacted with Piers’ borane, HB(C6F5)2. Compound 6 a gave mes2PCH2CHCH(B(C6F5)2] (9 a). In contrast, addition of HB(C6F5)2 to 6 b and 6 c gave mixtures of ...


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