Thiomorpholine → 2-Chloro-4-(4-fluoro-2-methylphenyl)-6-(thiomorpholin-4-yl)pyridine-3-carbonitrile

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Reaction Steps

Crude 3-cyano-2,6-dichloro-4-(4-fluoro-2-methylphenyl)pyridine, (32.44 g, 115.4 mmol) and 300 mL of methanol were added to a 500-mL, 3-necked flask (equipped with a 25-mL pressure-equilibrating addition funnel/dry N2 adapter, septum with teflon-coated thermocouple, and teflon paddle stirrer/glass shaft). Thiomorpholine (23.0 mL, 25.0 g, 242 mmol, 2.10 equiv) was added dropwise over a period of 22 minutes via the addition funnel, and the resulting mixture was stirred at 20–25° C. for 18 hours. The precipitate was filtered, washed with 30 mL of methanol, and dried to afford 35.47 g (88.4%) of 2-chloro-3-cyano-4-(4-fluoro-2-methylphenyl)-6-(thiomorpholino)pyridine as a beige solid.

Provenance & Evidence