1,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine) → HCID 58540099, compound

Temperature

90 °C

A solution of 5-(azetidin-1-ylmethyl)-1-methyl-1H-pyrazol-3-amine (292 mg, 1.76 mmol), 4-bromo-6-chloro-2-methylpyridazin-3(2H)-one (393 mg, 1.76 mmol) cesium carbonate (2.00 g, 6.15 mmol) and 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (152 mg, 0.26 mmol) in dioxane (10 ml) was flushed with argon before tris(dibenzylideneacetone)dipalladium(0) (121 mg, 0.13 mmol) was added and the resulting solution was heated at 90° C. for 18 h. The mixture was cooled to room temperature and diluted with dichloromethane (50 mL) and water. The layers were separated and the aqueous layer was extracted with dichloromethane (2×25 mL). The organic layers were combined, dried over magnesium sulfate. The resulting mixture was filtered and concentrated in vacuo. The precipitate formed was isolated by filtration, washed with ether and dried under vacuum to give 4-(5-(azetidin-1-ylmethyl)-1-methyl-1H-pyrazol-3-ylamino)-6-chloro-2-methylpyridazin-3(2H)-one (272 mg, 50%) as a light yellow solid.

1. additionwas added
2. temperatureThe mixture was cooled to room temperature
3. customThe layers were separated
4. extractionthe aqueous layer was extracted with dichloromethane (2×25 mL)
5. dry with materialdried over magnesium sulfate
6. filtrationThe resulting mixture was filtered
7. concentrationconcentrated in vacuo
8. customThe precipitate formed
9. customwas isolated by filtration
10. washwashed with ether
11. customdried under vacuum

ORD record

ord-fbfce9ef3853434285fa2d7d9b8243a9

Source dataset

uspto-grants-2013_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08481540B2