Total Synthesis of GKK1032A<sub>2</sub>via Direct 13-Membered Macrocyclization Using a Nucleophilic Aromatic Substitution of an (η<sup>6</sup>-Arene)Chromium Complex
The first enantioselective total synthesis of GKK1032A2 has been achieved. The key step is a direct construction of the highly strained 13‐membered macrocycle of GKK1032A2 by an intramolecular nucleophilicaromaticsubstitution (SNAr) reaction. This is the first successful example of construction of a macrocycle with an aryl ether linkage utilizing an intramolecular SNAr reaction of an (η6‐arene)chromium