Sodium hydride → 3-Bromo-2-(cyclopropylmethoxy)-5-methylsulfonylpyridine

A solution of cyclopropylmethanol (146 uL, 1.8 mmol) stirred in DMF (3 mL) at 0° C. was treated with NaH (75 mg, 1.9 mmol, 60% in mineral oil). After stirring at 0° C. for 30 min, the reaction mixture was treated with a solution of 3-bromo-2-chloro-5-methylsulfonylpyridine (400 mg, 1.5 mmol) in DMF (3 mL) by dropwise addition. After the ice bath was removed, the mixture was stirred at rt for 14 h. The reaction mixture was treated with water and extracted with EtOAc (30 mL×2). The combined organic layers were washed with brine, dried over Na2SO4, filtered, and concentrated in vacuo. The resulting residue was purified by silica gel column chromatography using a gradient of EtOAc (5 to 85%) in hexanes to give the title compound (298 mg, 65%). LCMS (M+H)+=307.

1. customAfter the ice bath was removed
2. stirringthe mixture was stirred at rt for 14 h
3. additionThe reaction mixture was treated with water
4. extractionextracted with EtOAc (30 mL×2)
5. washThe combined organic layers were washed with brine
6. dry with materialdried over Na2SO4
7. filtrationfiltered
8. concentrationconcentrated in vacuo
9. customThe resulting residue was purified by silica gel column chromatography

ORD-Eintrag

ord-cc9d759e6c7f466dbfdc87b1c18f22a7

Quelldatensatz

uspto-grants-2015_05

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09034900B2