The Total Synthesis of Chondrochloren A

Abstract

The first total synthesis of chondrochloren A is accomplished using a 1,2-metallate rearrangement addition as an alternative for the Nozaki-Hiyama-Kishi reaction. This transformation also avoids the inherent challenges of this polyketide segment and provides a new, unprecedented strategy to assemble polyketidal frameworks. The formation of the Z-enamide is accomplished using a Z-selective cross coupling of the corresponding amide to a Z-vinyl bromide.

Keywords: 1,2-metallate rearrangement; Hoppe anion; chondrochloren; natural product synthesis; polyketides.