Spontaneous cyclization of triflates derived from δ-benzyloxy alcohols: Efficient and general synthesis of C-vinyl furanosides

Article abstract of DOI:10.1016/0040-4039(94)02166-9

On reaction with triflic anhydride, the hept-1-enitols resulting from the Wittig reaction of tetra-O-benzyl D-hexopyranoses with [Ph₃P=CH₂] lead, in one step, to 3,6-anhydro-hept-1-enitol derivatives ('C-vinyl furanosides') in high y