Regioselective debenzylation of C-glycosyl compounds by boron trichloride
作者:Juan Xie、Mickaël Ménand、Jean-Marc Valéry
DOI:10.1016/j.carres.2004.12.001
日期:2005.2
Borontrichloride has been found to promote selective deprotection of 1,2- or 1,3-cis oriented secondary benzyl ethers of per-benzylated C-glycosyl derivatives. The reactivity towards BCl(3) follows the order: C-4>or=C-2>C-6>C-3 for C-glucopyranosyl derivatives and C-3>or=C-4>C-6>C-2 for C-galactopyranosyl derivatives. Preparatively useful selective debenzylation at secondary positions was possible