Tetrahedron
Tetrahedron
5 years ago

Synthesis of a novel functionalized tricyclic pyrimidine-fused 1,5-benzodiazepine library

Synthesis of a novel functionalized tricyclic pyrimidine-fused 1,5-benzodiazepine library
A series of novel tricyclic pyrimidine-fused 1,5-benzodiazepines (PFBZDs) was synthesized using an enaminone-based approach. The key step in the synthetic strategy involves the formation of the CCNMe2 structure on vicinal carbonyl groups of the 1H-1,5-benzodiazepine-2,4(3H,5H)-dione (BZD). The synthesis of pyrimidine-fused 1,5-benzodiazepines was performed by a simple and efficient method in good to excellent yields under mild and green conditions. The β-enaminoamide intermediates were condensed with thiourea and guanidine derivatives to form the corresponding tricyclic PFBZDs. But reaction of aminoguanidine, thiosemicarbazide, 4-phenylthiosemicarbazide and ethane-1,2-diamine with β-enaminoamides didn't produce any desired product and led to recovery of the corresponding starting BZD.

Publisher URL: www.sciencedirect.com/science

DOI: S0040402017303368

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