Knocking them into shape: The total synthesis of two reported marine natural products containing halogenated pyrano[3,2-b]pyrans (see example in blue) has led to the reassignment of both structures as halogenated 2,2′-bifuranyls (red). Concomitantly an efficient route to pyrano[3,2-b]pyrans is described.
No takes yet. Share an insight, caveat, or question.
Sheldrake et al. (2006) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: