Abstract Condensation of 1, 2, 3, 4, 6-penta-O-acetyl-β-d-galactopyranose with methyl 3, 6- di-O-benzyl-2-deoxy-2-phthalimido-β-d-glucopyranoside, followed by alkaline methanolysis, gave a derivative of lactosamine that has an unsubstituted β-d-galactopyranosyl group. Tributyltin oxide-mediated allylation gave a good yield of the 3′-O-allyl (9) and a poor yield of the 3′, 6′-di-O-allyl ether (8). Protection of 9 at O-6′ was achieved by reductive ...
![2-[(2R,3R,4R,5S,6R)-5-hydroxy-2-methoxy-4-phenylmethoxy-6-(phenylmethoxymethyl)oxan-3-yl]isoindole-1,3-dione Structure](https://image.chemsrc.com/caspic/356/97242-79-0.png)