Ein neuer Syntheseweg zu Offenkettigen und cyclischen Oligoetherketonen

A Novel Synthetic Route to Open-Chained and Cyclic Oligoetherketones Oligoetherketones of the structure 2a,b can be generated by repetitive insertion reactions of terminal biscarbenoids 4a,b, into the OH bonds of diols like 5. The formation of the corresponding ring systems 7a and the involved carbene dimerization leading to 8b are processes which compete with the linear polyinsertion. A related one-component reaction can be performed with ω-hydroxy-1-diazo-2-alkanones (13a–c 14a–c).