Visible Light-Induced 1,2-Alkoxy Shift of α-Diazoacetates for Wolff Rearrangements – Access to Oxyketenes

The Wolff rearrangement is an important transformation to access ketenes via 1,2-alkyl or aryl migrations of α-diazoketones. In contrast, alkoxy group migration from free singlet carbenes has remained elusive owing...