A variety of cyanohydrin THP ethers were readily prepared from carbonyl compounds with trimethylsilyl cyanide and tetrahydropyran-2-yl acetate under the influence of a catalytic amount of iron(III) triflate in a convenient one-pot procedure. This method was also effective to prepare O-protected cyanohydrins by various acetal-type protective groups. (c) 2006 Elsevier Ltd. All rights reserved.
Elphimoff-Felkin et al., Bulletin de la Societe Chimique de France, 1958, p. 522,530