Efficient tetrahydropyranylation of phenols and alcohols catalyzed by supported Mo and W Keggin heteropolyacids

GP Romanelli, PG Vázquez, LR Pizzio…

Index: Romanelli; Vazquez; Pizzio; Caceres; Blanco; Autino Synthetic Communications, 2003 , vol. 33, # 8 p. 1359 - 1365

Full Text: HTML

Citation Number: 18

Abstract

Abstract The protection of phenols as tetrahydropyranyl acetals is studied using supported Keggin heteropolyacids as catalysts, specifically molybdophosphoric or tungstophosphoric acids supported on silica. Phenol tetrahydropyranyl acetals are obtained in short times at room temperature with excellent yields. Protection of alcohols is also performed under mild conditions using both supported heteropolyacids, with yields ranging between good and ...

Related Articles:

Allyl tetrahydropyranyl ether: a versatile alcohol/thiol protecting reagent

[Kumar, Brijesh; Aga, Mushtaq A.; Mukherjee, Debaraj; Chimni, Swapandeep S.; Taneja, Subhash C. Tetrahedron Letters, 2009 , vol. 50, # 46 p. 6236 - 6240]

Re2O7-catalyzed reaction of hemiacetals and aldehydes with O-, S-, and C-nucleophiles

[Sittiwong, Wantanee; Richardson, Michael W.; Schiaffo, Charles E.; Fisher, Thomas J.; Dussault, Patrick H. Beilstein Journal of Organic Chemistry, 2013 , vol. 9, p. 1526 - 1532]

Re2O7-catalyzed reaction of hemiacetals and aldehydes with O-, S-, and C-nucleophiles

[Sittiwong, Wantanee; Richardson, Michael W.; Schiaffo, Charles E.; Fisher, Thomas J.; Dussault, Patrick H. Beilstein Journal of Organic Chemistry, 2013 , vol. 9, p. 1526 - 1532]

Tetrahydrofuranylation of alcohols catalyzed by alkylperoxy-λ 3-iodane and carbon tetrachloride

[Ochiai, Masahito; Sueda, Takuya Tetrahedron Letters, 2004 , vol. 45, # 18 p. 3557 - 3559]

More Articles...