Cesium carbonate → N-(2-[(2,3-Difluorobenzyl)thio]-6-{[(1R,2R)-2-hydroxy-methylpropyl]oxy}pyrimidin-4-yl)-(3R,5S)-3,5-dimethylpiperazine-1-sulfonamide

HRID 2388839Notes

Reaction equation

[CH3:1][C@H:2]1[NH:7][C@@H:6]([CH3:8])[CH2:5][N:4]([S:9]([NH2:12])(=[O:11])=[O:10])[CH2:3]1.C1(P(C2CCCCC2)C2C=CC=CC=2C2C(C(C)C)=CC(C(C)C)=CC=2C(C)C)CCCCC1.C(=O)([O-])[O-].[Cs+].[Cs+].Cl[C:54]1[N:59]=[C:58]([S:60][CH2:61][C:62]2[CH:67]=[CH:66][CH:65]=[C:64]([F:68])[C:63]=2[F:69])[N:57]=[C:56]([O:70][C@H:71]([CH3:75])[C@H:72]([OH:74])[CH3:73])[CH:55]=1>O1CCOCC1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[F:69][C:63]1[C:64]([F:68])=[CH:65][CH:66]=[CH:67][C:62]=1[CH2:61][S:60][C:58]1[N:59]=[C:54]([NH:12][S:9]([N:4]2[CH2:3][C@H:2]([CH3:1])[NH:7][C@H:6]([CH3:8])[CH2:5]2)(=[O:10])=[O:11])[CH:55]=[C:56]([O:70][C@H:71]([CH3:75])[C@H:72]([OH:74])[CH3:73])[N:57]=1

Participants

Conditions

Temperature: 100 °C

Procedure

To a solution of (2R,6S)-2,6-Dimethylpiperazine (1 g) in dioxane (10 ml) was added sulfamide (0.746 g) and the reaction mixture was then heated at reflux in dioxane for 3 d. The reaction mixture was partitioned between EtOAc (150 ml) and H2O (150 ml) and the aqueous re-extracted with EtOAc (2×150 ml). Organics were collected dried and reduced in vacuo to yield (3 R,5S)-3,5-dimethylpiperazine-1-sulfonamide as a white solid (1.05 g). A mixture of (3R,5S)-3,5-dimethylpiperazine-1-sulfonamide (0.541 g), tris(dibenzylideneacetone)dipalladium (0) (50 mg), 2-dicyclohexylphosphino-2′,4′,6′-tri-isopropyl-1,1′-biphenyl (XPHOS) (50 mg), cesium carbonate (0.731 g) and (2R,3R)-3-({6-chloro-2-[(2,3-difluorobenzyl)thio]pyrimidin-4-yl}oxy)butan-2-ol ((the product of example 4 step i), 0.541 g) in dioxane (40 mL) was heated at reflux in a microwave at 100° C., 300 W, open vessel with cooling for 20 min. The reaction mixture was then reduced in vacuo and the residue separated between DCM (200 ml) and H2O (200 ml). The organics were separated and the aqueous layer was re-extracted with DCM (2×200 ml). Organics were combined, dried (MgSO4) and reduced in vacuo and the resulting residue was purified by prep HPLC to give the title compound as a white solid. Yield: 80 mg

Workup

temperaturewas heated
temperature300 W, open vessel with cooling for 20 min
customthe residue separated between DCM (200 ml) and H2O (200 ml)
customThe organics were separated
extractionthe aqueous layer was re-extracted with DCM (2×200 ml)
dry with materialdried (MgSO4)
customthe resulting residue was purified by prep HPLC

Sources & evidence

ORD record: ord-95bb2c88323243e493ebe13d57ce43e4
Source dataset: uspto-grants-2012_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08269002B2

Reaction notes

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