TFAA/H<sub>3</sub>PO<sub>4</sub>mediated unprecedented N-acylation of carbazoles leading to small molecules possessing anti-proliferative activities against cancer cells
作者:Sunder Kumar Kolli、Bagineni Prasad、P. Vijaya Babu、Mohd Ashraf Ashfaq、Nasreen Z. Ehtesham、R. Ramesh Raju、Manojit Pal
DOI:10.1039/c4ob00686k
日期:——
For the first time TFAA/H3PO4 has facilitated the direct and metal-free N-acylation of carbazoles leading to a number of N-acylated derivatives. Several of these compounds were found to be promising when tested for their anti-proliferative properties against oral cancer cell lines.
9-benzoylcarbazoles with internal alkynes proceeds efficiently through ortho C–H and C–N bond cleavages. This reaction provides direct access to variously substituted indanone derivatives. The carbazolyl leavinggroup can be readily recovered and reused for preparing the starting materials. Keywords: annulation; rhodium catalyst; C–H bond cleavage
development of new amide precursors for selective, catalytic activation of carbon–nitrogen bonds in amides is a fundamental objective of this emerging reactivity manifold. We report the palladium-catalyzed Suzuki–Miyauracross-coupling of N-acylcarbazoles and N-acylindoles with arylboronicacids by a highly selective N–C(O) cleavage. The key amide bond ground-state destabilization stems from Nlp to Ar conjugation