Sodium hydride → 3-[5-(2-Fluoro-phenyl)-pyridin-2-yloxy]-azetidine-1-carboxylic acid (6-methyl-pyridazin-3-yl)-amide

To a solution of 6-Methyl-pyridazin-3-ylamine (60 mg, 0.55 mmol, [Cas. No 18591-82-7]) in DMF (3 mL) at 0° C. was added sodium hydride (20 mg, 0.5 mmol, 60% disp. in mineral oil). After stirring at 0° C. for 15 min. a solution of 3-[5-(2-Fluoro-phenyl)-pyridin-2-yloxy]-azetidine-1-carboxylic acid 4-nitro-phenyl ester (102 mg, 0.25 mmol) in DMF (4 mL) was added dropwise. After stirring for 16 hrs at ambient temperature the reaction mixture was concentrated in vacuo, diluted with ethyl acetate (50 mL) and washed sequentially with sat. aqueous sodium hydrogen carbonate solution (2×50 mL) then sat. sodium chloride solution (50 mL). Mixture dried over magnesium sulphate and filtered. Filtrate solvents were removed in vacuo and the residue was purified by flash chromatography (40% ethyl acetate in DCM) to give the title compound (48 mg, 49%)

1. additionwas added dropwise
2. concentrationwas concentrated in vacuo
3. additiondiluted with ethyl acetate (50 mL)
4. washwashed sequentially with sat. aqueous sodium hydrogen carbonate solution (2×50 mL)
5. dry with materialMixture dried over magnesium sulphate
6. filtrationfiltered
7. customFiltrate solvents were removed in vacuo
8. customthe residue was purified by flash chromatography (40% ethyl acetate in DCM)

ORD record

ord-48e213c26ad341d199b2d5c36b9ba511

Source dataset

uspto-grants-2013_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08450346B2