Les fluorosulfates de polyfluoroalkyle R f OSO 2 F [R f =CF 3 CH 2 et (CF 3 ) 2 CH] reagissent avec les 胺,les alcools et les alcoolates倒入donner de nouveaux酰胺硫酸盐脱多氟烷基硫酸盐和二烷基化物。La liaison S-O de ces fluorosulfates de polyfluoroalkyle reste 完整存在 de 亲核试剂 durs。Cependant avec le methanethiol on obtient lesulfe demethyle et de trifluoro-2,2,2ethyle
Catalytic Metal-free Allylic C–H Amination of Terpenoids
作者:Wei Pin Teh、Derek C. Obenschain、Blaise M. Black、Forrest E. Michael
DOI:10.1021/jacs.0c06997
日期:2020.9.30
selective replacement of C-H bonds in complex molecules, especially natural products like terpenoids, is a highly efficient way to introduce new functionality and/or couple fragments. Here, we report the development of a new metal-free allylic amination of alkenes that allows the introduction of a widerange of nitrogen functionality at the allylic position of alkenes with unique regioselectivity and no
Synthesis of α-Tertiary Amine Derivatives by Intermolecular Hydroamination of Unfunctionalized Alkenes with Sulfamates under Trifluoromethanesulfonic Acid Catalysis
作者:Jun Fei、Zhen Wang、Zheren Cai、Hao Sun、Xu Cheng
DOI:10.1002/adsc.201500646
日期:2015.12.14
An efficient and mild trifluoromethanesulfonic acid-catalyzed hydroamination of unfunctionalized alkenes to afford α-tertiary amine derivatives at temperatures as low as room temperature is reported. 2,2,2-Trifluoroethyl sulfamate was found to be the optimal nitrogen source because its good solubility in both organic solvents and water facilitated both conversion and purification. The reaction conditions
An efficient catalytic aminohydroxylation reaction of alkenes in aqueous media is disclosed for the first time. The multiple roles water plays as a reactionmedium, nucleophile, and Brønsted acid catalyst provide high reactivity and chemo- and regioselectivities to this transformation. This method provides easy access to various valuable vicinal amino alcohols in a sustainable manner.
Carbonic Anhydrase Inhibitors: Inhibition of Transmembrane, Tumor-Associated Isozyme IX, and Cytosolic Isozymes I and II with Aliphatic Sulfamates
作者:Jean-Yves Winum、Daniela Vullo、Angela Casini、Jean-Louis Montero、Andrea Scozzafava、Claudiu T. Supuran
DOI:10.1021/jm030911u
日期:2003.12.1
aliphatic sulfamates and related derivatives incorporating cyclic/polycyclic (steroidal) moieties in their molecules has been synthesized and assayed as inhibitors of the zinc enzyme carbonic anhydrase (CA) and, more precisely, of the cytosolic isozymes CA I and II and the transmembrane, tumor-associated isozyme CA IX. The most potent CA I inhibitor was n-tetradecyl sulfamate and some (substituted)benzyl/phenethyl
Analyzing Site Selectivity in Rh<sub>2</sub>(esp)<sub>2</sub>-Catalyzed Intermolecular C–H Amination Reactions
作者:Elizabeth N. Bess、Ryan J. DeLuca、Daniel J. Tindall、Martins S. Oderinde、Jennifer L. Roizen、J. Du Bois、Matthew S. Sigman
DOI:10.1021/ja5015508
日期:2014.4.16
Predicting site selectivity in C–H bond oxidation reactions involving heteroatom transfer is challenged by the small energetic differences between disparate bond types and the subtle interplay of steric and electronic effects that influence reactivity. Herein, the factorsgoverningselective Rh2(esp)2-catalyzed C–H amination of isoamylbenzene derivatives are investigated, where modification to both