Synthese substituierter 5,6‐Dihydro‐2H‐pyran‐2‐one und ihre Umsetzung mit Brom

Synthesis of Substituted 5,6‐Dihydro‐2H‐pyran‐2‐ones and their Reaction with Bromine The synthesis of the substituted 5,6‐dihydro‐2H‐pyran‐2‐ones 2a–f and the reaction of 2a–e and 1g with bromine to 3a–f are described.