N-Iodosuccinimide → HCID 71743077, Verbindung

To a solution of 2-fluoropyridin-3-amine (5.00 g, 44.60 mmol) in DMF (100 mL) was added N-iodosuccinimide (11.04 g, 49.06 mmol). The resulting mixture was stirred overnight. The reaction mixture was partitioned between EtOAc and water. The organic layer was dried with MgSO4 and concentrated. The residue was purified on silica eluted 0 to 50% EtOAc in Heptane. 2-fluoro-6-iodopyridin-3-amine was obtained as a dark tan solid (8.8674 g, 83%). To an ice cooled mixture of tert-Butyl nitrite (356.8 uL, 3.000 mmol) and Copper(II) bromide (536.0 mg, 2.400 mmol) in Acetonitrile (5 mL) was added 2-fluoro-6-iodopyridin-3-amine was obtained as a dark tan solid (476.0 mg, 2.000 mmol). The resulting mixture was stirred overnight allowing warming to room temperature. The mixture was filtered through Celite. The filtrated was concentrated. The residue was partitioned between Et2O and saturated NH4Cl. The organic layer was dried with MgSO4, and then concentrated. The residue was purified on silica eluted with 0 to 20% EtOAc in Heptane. 3-Bromo-2-fluoro-6-iodopyridine was obtained as a yellow solid (407.1 mg, 57%)

1. customThe reaction mixture was partitioned between EtOAc and water
2. dry with materialThe organic layer was dried with MgSO4
3. concentrationconcentrated
4. customThe residue was purified on silica
5. washeluted 0 to 50% EtOAc in Heptane

ORD-Eintrag

ord-e03edef362924da6a93d64eb4ff4694e

Quelldatensatz

uspto-grants-2016_02

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09260425B2