Dowex 50WX4–100: An Efficient Catalyst for the Tetrahydropyranylation of Alcohols

Acid-washed bentonite: a new reagent for the deprotection of tetrahydropyranyl ethers

“…The identity of all the tetrahydropyranyl derivatives was confirmed by spectral data. [5][6][7][8] Preparation of activated bentonite 9,10 Bentonite is a commercially available (Sigma-Aldrich) colloidal clay which consists primarily of montmorillonite. The molecular formula is H 2 Al 2 O 6 Si and molecular weight 180.1 g mol −1 .…”

Ferrous methanesulfonate as an efficient and recyclable catalyst for the tetrahydropyranylation of alcohols and phenols under solvent-free conditions

“…Then the pure products were identified by bp, IR, 1 H NMR, and elemental analysis, which agreed favorably with those of authentic samples. [23][24][25][26][27][28][29][30][31][32][33]…”

“…1 Tetrahydropyranylation has been performed with a variety of reagents and catalysts including LiOTf, 2 polyaniline salt, 3 PdCl 2 (CH 3 CN) 2 , 4 Fe(ClO 4 ) 3 , 5 Bu 4 NBr 3 , 6 VO(OAc) 2 , 7 CAN, 8 Fe(HSO 4 ) 3 , 9 H 14 [NaP 5 W 30 O 110 ], 10 Bi(NO 3 ) 3 ? 5H 2 O, 11 NbCl 5 , 12 Pyridinium chloride, 13 Mob, 14 activated carbon supported H 2 SO 4 , 15 2,4,6-trichloro [1,3,5]triazine, 16 and Dowex 50WX4-100 17 etc. Most of these proved to be efficient for this reaction.…”

Acid-Washed Bentonite: A New Reagent for the Deprotection of Tetrahydropyranyl Ethers

“…The identity of all the tetrahydropyranyl derivatives was confirmed by spectral data. [5][6][7][8] Preparation of activated bentonite 9,10 Bentonite is a commercially available (Sigma-Aldrich) colloidal clay which consists primarily of montmorillonite. The molecular formula is H 2 Al 2 O 6 Si and molecular weight 180.1 g mol −1 .…”