Abstract
The first reported synthesis of potential kinase inhibitors, 4-oxo-4,5-dihydrothieno[3,2-\(c\)]quinoline-2-carboxylic acid derivatives starting from aniline is described. This efficient high yielding sequence was carried out in six steps without any chromatographic purification. A tandem nucleophilic aromatic substitution/cyclization reaction was used as a key step in the sequence. The versatile intermediate 2-carboxylic acid was used as a suitable precursor to access the functionalization of the C-ring, by convergent analog synthesis of several novel derivatives.
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Acknowledgments
This investigation was conducted with support from the Research facilities improvement program C06RR14503-01 obtained from the National Institute of Health National Center for Research Resources. The authors would like to thank Dr. Bharati Avula for the HRMS data. We would also like to thank Dr. Ronald F. Borne for careful review of this manuscript. We would like to acknowledge Dr. Mitchell Avery, Dr. Francisco Leon and Dr. Robert J. Doerksen for their helpful discussions.
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Chatterjee, A., Cutler, S.J., Khan, I.A. et al. Efficient synthesis of 4-oxo-4,5-dihydrothieno[3,2-\(c\)]quinoline-2-carboxylic acid derivatives from aniline. Mol Divers 18, 51–59 (2014). https://doi.org/10.1007/s11030-013-9476-4
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DOI: https://doi.org/10.1007/s11030-013-9476-4