• 11-Step Total Synthesis of Pallambins C and D

      Martinez, LP; Umemiya, S; Wengryniuk, SE; Baran, PS (2016-06-22)
      © 2016 American Chemical Society. The structurally intriguing terpenes pallambins C and D have been assembled in only 11 steps from a cheap commodity chemical: furfuryl alcohol. This synthesis, which features a redox-economic approach free of protecting-group manipulations, assembles all four-ring systems via a sequential cyclization strategy. Of these four-ring constructing operations, two are classical (Robinson annulation and Mukaiyama aldol) and two are newly devised. During the course of this work a method for the difunctionalization of enol ethers was developed, and the scope of this transformation was explored.