Efficient Synthesis of Imidazole-Fused Benzodiazepines Using Palladium-Catalyzed Intramolecular C–N Bond Formation Reaction
摘要:
An efficient three-step synthetic route to imidazole-fused benzodiazepines from imidazole-2-carbaldehyde is described. Application of intramolecular Buchwald-Hartwig cycloamination reaction in the final step is shown to be a convenient method for the synthesis of fused seven-membered diazacycles. The reactions proceeded smoothly with both aliphatic and aromatic amines.
A novel series of HDACinhibitors demonstrating classI and IIb subtype selectivity have been identified using a scaffold-hopping strategy. Several designed compounds showed better selectivity for classI and IIb over class IIa HDAC isoforms comparing to the FDA approved HDAC targeting drug SAHA. A representative lead compound 22 bearing a biphenyl moiety demonstrated promising classI and IIb HDAC