Exploiting the Regioselectivity of Baeyer–Villiger Monooxygenases for the Formation of β‐Amino Acids and β‐Amino Alcohols

To the left or to the right? The regioselective insertion of oxygen in Baeyer–Villiger monooxygenase (BVMO) catalyzed oxidations not only affords the expected protected β-amino alcohol, but can also be used to provide access to β-amino acids as exemplified for β-leucine (see scheme; PG=protecting group).