Cesium carbonate → Ethyl (2R)-2-[(2-[(2,3-difluorobenzyl)thio]-6-{[(4-ethylpiperazin-1-yl)sulfonyl]amino}pyrimidin-4-yl)oxy]propanoate

To a solution of 1-Ethylpiperazine (1 g) in dioxane (10 ml) was added sulfamide (0.746 g) and the reaction mixture was then heated at reflux in dioxane for 72 h. The reaction mixture was purified by loading onto SCX and eluting with (200 ml) MeOH/NH3. The eluent was then reduced in vacuo to yield 4-Ethylpiperazine-1-sulfonamide as a white solid. A mixture of 4-ethylpiperazine-1-sulfonamide (0.289 g), tris(dibenzylideneacetone)dipalladium (0) (50 mg), 2-dicyclohexylphosphino-2′,4′,6′-tri-isopropyl-1,1′-biphenyl (XPHOS) (50 mg), cesium carbonate (0.628 g) and 2-[[6-chloro-2-[[(2,3-difluorophenyl)methyl]thio]-4-pyrimidinyl]oxy]-(2R)-propanoic acid ethyl ester ((the product of example 5 step i), 0.50 g) in dioxane (10 mL) was heated at reflux in a microwave at 100 C, 300 W, open vessel with cooling for 30 min. The reaction mixture was then reduced in vacuo and the residue was partitioned between EtOAc (150 ml) and H2O (100 ml). The organics were separated and the aqueous layer was re-extracted with EtOAc (2×150 ml). Organics were combined, dried (MgSO4) and reduced in vacuo to give the subtitle compound as a yellow solid. Yield: 0.720 g

1. temperaturewas heated
2. temperatureat reflux in a microwave at 100 C, 300 W, open vessel
3. temperaturewith cooling for 30 min
4. customthe residue was partitioned between EtOAc (150 ml) and H2O (100 ml)
5. customThe organics were separated
6. extractionthe aqueous layer was re-extracted with EtOAc (2×150 ml)
7. dry with materialdried (MgSO4)

ORD 기록

ord-ac6c356fd7f540e38a1790d10b1a0b07

출처 데이터셋

uspto-grants-2014_05

DOI

10.6084/m9.figshare.5104873.v1

특허 번호

US08722883B2