Abstract
A new one-pot Bischler–Napeiralski type cyclization reaction between pyridine-1,2-diamines and various carboxylic acids with PPA as catalyst to prepare pyridobenzodiazepines is proposed. In the new synthetic route, the reaction time is only one-third of the methods reported. The synthetic strategy provides an efficient way to prepare novel structurally diversified heterocyclic compounds of pyridobenzodiazepine family with potential pharmaceutical or biological activities.
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Shi, F., Bai, X., Dang, Q. et al. A rapid synthetic method of pyridobenzodiazepines. Res Chem Intermed 36, 253–258 (2010). https://doi.org/10.1007/s11164-010-0135-4
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DOI: https://doi.org/10.1007/s11164-010-0135-4