Scheme 1: Retrosynthetic strategy for target molecule 1.

It was envisioned that target molecule 1 can be synthesized from building blocks 4, 5, 6 and 7 via a convergent (1 + 2 + 2 + 1) orthogonal glycosylation in a one-pot manner.

It was envisioned that target molecule 1 can be synthesized from building blocks 4, 5, 6 and 7 via a convergent (1 + 2 + 2 + 1) orthogonal glycosylation in a one-pot manner.