Journal
ORGANIC PROCESS RESEARCH & DEVELOPMENT
Volume 12, Issue 3, Pages 490-495Publisher
AMER CHEMICAL SOC
DOI: 10.1021/op700270n
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Imatinib and its analogues were successfully synthesized by an improved method in 19.5- 46.2% total yield of six main steps. Pyrimidinyl amine was prepared by the reaction of enaminone and guanidine nitrate without the use of a toxic cyanamide. N-(2-Methyl-5-nitrophenyl)-4-(pyridin-3-yl) pyrimidin-2-amine as a key intermediate for the synthesis of imatinib was prepared by copper-catalyzed N-arylation of heteroarylamine in 82% yield. The copper salts were used instead of the expensive palladium compounds in this C-N bond-forming reaction. The intermediate nitro compound was reduced by a N2H4 center dot H2O/FeCl3/C system using water as a solvent in good yield.
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