Site-Selective Aliphatic C–H Bromination Using <i>N</i>-Bromoamides and Visible Light
作者:Valerie A. Schmidt、Ryan K. Quinn、Andrew T. Brusoe、Erik J. Alexanian
DOI:10.1021/ja508469u
日期:2014.10.15
Transformations that selectively functionalize aliphatic C-H bonds hold significant promise to streamline complex molecule synthesis. Despite the potential for site-selective C-H functionalization, few intermolecular processes of preparative value exist. Herein, we report an approach to unactivated, aliphatic C-H bromination using readily available N-bromoamide reagents and visible light. These halogenations
Disclosed are electrochemical methods to prepare an alkane or an alkene, such as a cis- alkene, from an alkyne, or an alkane from an alkene. The method utilizes an electrochemical cell having a cathode and an anode and a reactor.
A Simple Preparation of Alkyl Trifluoromethanesulfonates (Triflates) from Alkyl Trimethylsilyl Ethers
作者:Corinne Aubert、Jean-Pierre Bégué
DOI:10.1055/s-1985-31336
日期:——
Several alkyl trifluoromethanesulfonates (triflates) 2 are prepared by reacting alkyl trimethylsilyl ethers 1 with trifluoromethanesulfonic anhydride. The triflates 2 can be used for further reactions without isolation, as illustrated in the preparation of the ether 3 and cumene (4).
Catalytic Esterification of Alcohols, Carboxylic Acids and Transesterification Reactions with Cerium(IV) Triflate
作者:Nasser Iranpoor、Marzieh Shekarriz
DOI:10.1246/bcsj.72.455
日期:1999.3
reactions of alcohols with acetic, chloroacetic, trifluoroacetic, propionic, stearic, and benzoic acids were catalyzed with Ce(OTf)4 in a solvent or under solvent-free conditions with high yields. The formylation and acetylation of primary and secondary alcohols were also easily achieved in ethyl formate and ethyl acetate. A high retention of the configuration was observed in the acetylation and formylation
9-diones has been further investigated. In the process of investigating the factors that control the selectivity and the biological activity associated with these two compounds, a novel class of antibacterial cationic anthraquinone analogs has been developed. Although these compounds are structurally similar, different antibacterial profiles are noted. One lead compound, 4e manifests high potency (MIC < 1 μg/mL)