Abstract
Based on the reported routes, a convergent eight-step approach to Gilteritinib fumarate was designed, which is suitable for industrial implementation. The first key intermediate, 3,5-dichloro-6-ethylpyrazine-2-carboxamide (6), was obtained from 2,6-dichloropyrazine in 49.3% yield by two subsequent one-pot Minisci reactions. The second key intermediate, 1-methyl-4-(piperidin-4-yl)piperazine (3), was synthesized from Boc-4-piperidone and N-methylpiperazine in 88.5% overall yield via two step reaction sequence that included reductive amination and the removal of Boc protective group. The target compound, Gilteritinib fumarate, was obtained in five steps from 1-fluoro-2-methoxy-4-nitrobenzene in 46.9% overall yield. Of special interest in this reaction sequence is the Ullmann-type coupling that was performed in the presence of the CuI-l-quebrachitol catalytic system providing an excellent catalytic effect.
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This work was funded by the Liaoning Revitalization Talents Program (XLYC1908031), Basic Research Project of Department of Education of Liaoning Province — natural sciences (2020LJC02).
No human or animal subjects were used in this research.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, Vol. 72, No. 8, pp. 1921–1928, August, 2023.
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Xu, H., Chen, L., Chen, Y. et al. Study on the synthesis technology of anticancer drug Gilteritinib fumarate. Russ Chem Bull 72, 1921–1928 (2023). https://doi.org/10.1007/s11172-023-3977-9
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DOI: https://doi.org/10.1007/s11172-023-3977-9