Rare earth(III) perfluorooctanesulfonates catalyzed Friedel–Crafts alkylation in fluorous biphase system

Chiral Inductive Diastereoconvergent Friedel–Crafts Alkylation Reaction of Diastereomixtures of Diarylmethanols with 2‐Naphthol Derivatives Catalyzed by SnBr4

“…Although various methods for the preparation of such compounds have been reported with the use of a range of catalysts such as metal triflates, H 2 SO 4 , NbCl 5 , I 2 , surfactant‐type Brønsted acids, amberlyst‐15, pentafluorophenylboronic acid, and NaHSO 4 /SiO 2 , the substrate scope has not yet been thoroughly investigated . Recently, we developed a general method for the SnBr 4 ‐promoted Friedel–Crafts‐type dehydrative alkylation of diarylmethanols 1 with 2‐naphthol derivatives to yield 2 under mild conditions by adjusting the catalyst loading and the reaction temperature according to the electronic nature of the substrates (Scheme , part 1) …”

Polymer-supported ytterbium perfluorooctanesulfonate [Yb(OPf)3]: A recyclable catalyst for organic reactions

“…We prepared Yb(OPf) 3 from ytterbium oxide (Yb 2 O 3 ) by stirring it with heptadecafluorooctanesulfonic acid (R f8 SO 3 H, PfOS) (Scheme 1) according to the previously reported method [18][19][20][21][22][23]. To select our catalytic system, we took into account that the ytterbium catalyst has to be fixed onto a polymer, possibly by chelation.…”

“…In previous research on lanthanide perfluorooctanesulfonate catalyzed reactions, we found that the reported ytterbium perfluorooctanesulfonate [Yb(OPf) 3 ] is an efficient and relatively cheap catalyst for various organic reactions such as Fridel-Crafts alkylation [18] and acylation [19,20], esterification [21], nitration [22][23][24], and aldol condensation [25] in fluorous biphasic system. Taking concerns on fluorous solvents into consideration, we decided to concentrate on developing a supported-Yb(OPf) 3 catalytic system which is highly active and stable for organic reactions.…”

Suzuki-Miyaura Cross-Couplings Mediated by trans-PdBr(N-Succ)(PPh3)2: A Convenient Synthetic Method for Diarylmethanes and Aryl(heteroaryl)methanes

“…The crude product adsorbed on silica gel was transferred onto a short silica gel column. Elution with PE gave the desired 1benzyl-4-fluorobenzene (4b) 13 as a colourless oil; yield: 12.02 g (88%). 1 The characterisation data for the compounds listed in Table 1 can be found in reference 10.…”