abstract |
2,3,4,5-Tetrahydro-benzodiazepines are converted into 2,3dihydro-1,4-benzodiazepines by treatment with a selected oxidizing agent. Suitable oxidizing agents include diethylazodicarboxylate, quinones such as 2,3-dichloro-5,6dicyanobenzoquinine, 5,6chloranil and alkali metal hypohalites, such as alkali metal hypoiodites, e.g., sodium hypoiodite. |