WebAug 22, 2012 · Here we describe a Brønsted acid-catalyzed intramolecular Friedel–Crafts alkylation between various aromatic partners and simple alkenes. The reaction is high-yielding, convenient, and atom-economical. We have previously shown that 2-alkenyl-1,1-dichloro-2-silyloxycyclopropanes undergo a domino process involving Ag (I)-promoted … WebMar 12, 2024 · A series of highly diversified 3-aroylmenadiones was prepared by a new Friedel-Crafts acylation variant/oxidative demethylation strategy. A mild and versatile acylation was performed between 1,4-dimethoxy-2-methylnaphthalene and various activated/deactivated benzoic and heteroaromatic carboxylic acids, in the presence of …
Trifluoromethanesulfonic acid catalyzed Friedel-Crafts …
WebFeb 23, 2024 · Subsequent activation of the alcohol by triflic anhydride prompted the homoallylic cyclization to give the ... H. Tsuchida, M. Segi and T. Nakajima, Stereoselective acid-catalyzed homoallylic rearrangement of cyclopropylsilylmethanols: an efficient ... For an example of cyclopropylcarbinyl cations in Friedel-Crafts-type reactions, see ... WebIsobutylbenzene (IBB) is mixed with propanoic acid and triflic acid. The resulting mixture enters PFR R-101 (150°C) in which IBB undergoes Friedel-Crafts acylation to form 1- (4-isobutyl- phenyl)propan-1-one (2A ). The effluent of R-101 is then cooled to 0°C. Diacetoxyiodobenzene (PhI (OAc) 2) is dissolved in trimethyl orthoformate (TMOF) in ... sew phone bag
Brønsted-Acid-Catalyzed Friedel-Crafts Reaction and
WebMar 26, 2024 · Crystalline sPS was functionalized by Brønsted acid-catalyzed Friedel–Crafts alkylation. Triflic acid protonates a tertiary alcohol and generates a … WebAug 21, 2012 · The Brønsted superacid, triflic acid, promotes these reactions and a mechanism is proposed involving d … Despite the relatively low reactivities of urea and thiourea functional groups towards nucleophilic attack, we have found conditions in which they are useful substrates in Friedel-Crafts reactions. WebJan 1, 2009 · Triflic acid is well known not only as a Friedel-Crafts promoter, but also as a deglycosidation reagent. In this study, we promote effective Friedel-Crafts acylations for … the twelve aleksandr blok analysis