4-Amino-1-Boc-piperidine → 1,1-Dimethylethyl 4-({[(2-fluoro-6-iodo-4-methylphenyl)amino]-carbonyl}amino)-1-piperidinecarboxylate

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Reaction Steps

A mixture of the crude 1-fluoro-3-iodo-2-isocyanato-5-methylbenzene from description D2, 4-amino-1-N-Boc piperidine (200 mg, 1 mmol), and dichloromethane (3 ml) was stirred at room temperature for 1 h then directly purified by chromatography on silica gel eluting with 0 to 10% methanol in dichloromethane. Further purification by MDAP (mass-directed auto-purification) gave the title compound 300 mg.

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