Synthesis of 'α-homogalactostatin' and of its 1,N-anhydro derivative

Article abstract of DOI:10.1016/0040-4039(95)00708-K

α-Homogalactostatin 2 was prepared in 10 steps from 2,3,4,6-tetra-O-benzyl-D-galactose by way of a Wittig chain extension and a mercuricyclization. The synthesis of 2 was assisted by the unexpected participation of the nitrogen protecting group (benzyl ca