2012年11月12日 · We investigated the possibility of proton exchange reaction between protic ionic liquid of diethylmethylammonium trifluoromethanesulfonate ([dema][TfOH]) and H 2 O by using NMR spectroscopy and theoretical calculation.

2017年4月1日 · The high protonating power and low nucleophilicity makes trifluoromethanesulfonic acid capable of generating from organic molecules cationic species which can be detected by spectral methods (NMR...

2009年1月13日 · Dealkylative lactonisation of allylmalonates is mediated by TfOH and occurs via an oxonium triflate intermediate, detected by NMR spectroscopy. 2H-labelling experiments suggest intramolecular transfe...

2011年1月21日 · In this paper, we report the comparisons of O- and C-acylation for the phenol reaction with acyl halides, and Fries rearrangement of phenyl ester using TfOH. Furthermore, the established conditions were applied to effective synthesis of optically pure hTyr using stoichiometric amounts of unprotected phenol and acyl chloride derivative of Asp. 2.

2017年6月2日 · The high protonating power and low nucleophilicity makes trifluoromethanesulfonic acid capable of generating from organic molecules cationic species which can be detected by spectral methods (NMR, IR spectroscopy, etc.), and their transformations can …

2023年10月18日 · For RRV > 300, we provided first evidence of a glycosyl halide intermediate in the NXS/TfOH condition, though low-temperature NMR (cycles A to C in Fig. 2). To illustrate how glycosyl halide was formed, two plausible pathways were further proposed .

efficient and recyclable solid acid catalyst through direct absorption of TfOH onto very cheap chromatographic silica gel. TfOH-SiO 2 has been applied as the catalyst for intramolecular Friedel-Crafts reaction of various 2-phenoxy-1-phenylethanones and gave the products in moderate to excellent yields. The catalyst TfOH-SiO 2

2025年1月30日 · Herein, we report a green, cheap, metal-free, photochemical decarboxylative protocol for the 1,4-radical conjugate addition (Giese reaction) using thioxanthone, a commercially available organic molecule, or a thioxanthone-triflic acid (TfOH) complex, as the photocatalyst, under LED 427 nm irradiation.

The reaction of 3-phenylhepta-3,4-dien-5-yl n-perfluorobutyl ketone 1d (0.2090 g, 0.50 mmol) with TfOH (99%, 2.3 μL, d = 1.695 g mL −1, 0.0039 g, 0.026 mmol) in toluene (5 mL) at 60 °C for 4 h afforded 2d (0.1569 g, 75%) (chromatography eluent: petroleum ether) as a liquid: 1 H NMR (300 MHz, CDCl 3) δ 7.50–7.31 (m, 3 H, ArH), 7.31–7.20 ...

实用有效 三氟甲磺酸 （三氟乙酸）在温和的反应条件下，开发了由1,4-二烷氧基苯与多聚甲醛合成官能化的柱[ n ]芳烃和copillar [5]芳烃的）催化环寡聚反应策略，并研究了溶液相催化合成柱芳烃的反应机理通过室温X波段ESR光谱，质谱，NMR和对照实验，表明最初的 ...