This paper reports a novel approach to synthesize pazopanib. In our synthetic route, the potently mutagenic alkylating agents such as dimethyl sulfate and methyl iodide are avoided. A novel regioselective methylation of the 2- position of 3-methyl-6-nitro-1H-indazole was reported. This novel route is one step shorter than the previously reported route.
Keywords: Anticancer drug, pazopanib, regioselective methylation, synthesis, trimethyl orthoformate, vasculature, dichloropyrimidine, chloride, methylene
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