Abstract
The benzylation of 1,6-anhydro-β- d-galactopyranose and the manno, allo, altro, gulo, talo, gluco, and ido isomers, using bis(tributyltin) oxide and N-methylimidazole, tetrabutylammonium bromide, tetrabutylammonium iodide, or tetrabutylammonium fluoride as catalyst, has been studied. The results confirm the importance of the catalyst in the benzylation reactions and indicate that the presence of a cis-axial hydroxyl group seems to be necessary for regioselective benzylation.
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