Application Note 1: Synthesis of Cookson’s diketone via intramolecular [2+2] photocycloaddition

The intramolecular [2+2]-photocycloaddition leading to Cookson’s diketone 2 was performed in the HANU-reactor with a productivity of 2.3 kg/d.

Synthesis of Cookson’s diketone via intramolecular [2+2] photocycloaddition