Preparation of 1,2,3,4,6‐penta‐O‐galloyl‐[U‐14C]‐D‐glucopyranose

The synthesis of 1,2,3,4,6‐penta‐O‐galloyl‐[U‐14C]‐D‐glucopyranose is described. [U‐14C] glucopyranose was reacted with tri‐O‐benzylgallic acid forming 1,2,3,4,6‐penta(tri‐O‐benzylgalloyl)‐[U‐14C]‐D‐glucopyranose as chromatograpically separable anomers. Removal of the benzyl group by catalytic hydrogenation afforded 1,2,3,4,6‐penta‐O‐galloyl‐[U‐14C]‐D‐glucopyranose in 54% overall yield.