Potassium Carbonate → Methyl 3-[2-Methoxycarbonyl-2-(4-methoxy-6-methyl-2-pyrimidinyloxy)-1,1-diphenylethoxy]-2,2-dimethylpropionate

HRID 397332Notes

Reaction equation

[OH:1][CH:2]([C:25]([O:27][CH3:28])=[O:26])[C:3]([C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1)([C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1)[O:4][CH2:5][C:6]([CH3:12])([CH3:11])[C:7]([O:9][CH3:10])=[O:8].C([O-])([O-])=O.[K+].[K+].CS([C:39]1[N:44]=[C:43]([O:45][CH3:46])[CH:42]=[C:41]([CH3:47])[N:40]=1)(=O)=O>CN(C=O)C.O>[CH3:28][O:27][C:25]([CH:2]([O:1][C:39]1[N:44]=[C:43]([O:45][CH3:46])[CH:42]=[C:41]([CH3:47])[N:40]=1)[C:3]([C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1)([C:19]1[CH:20]=[CH:21][CH:22]=[CH:23][CH:24]=1)[O:4][CH2:5][C:6]([CH3:12])([CH3:11])[C:7]([O:9][CH3:10])=[O:8])=[O:26]

Participants

Conditions

Temperature: 80 °C

Procedure

10 g (25.9 mmol) of methyl 3-(2-hydroxy-2-methoxycarbonyl-1,1-di-phenylethoxy)-2,2-dimethylpropionate were dissolved in 40 ml of DMF under N2, 1.78 g (13 mmol) of K2CO3 and 5.2 g (25.9 mmol) of 2-methanesulfonyl-4-methoxy-6-methylpyrimidine were added, and the mixture was stirred at 80° C. for 2 h. It was subsequently diluted with 40 ml of H2O and extracted twice with 30 ml of diethyl ether, the organic phase was dried over MgSO4 and concentrated, and the residue was purified by chromatography on silica gel with ethyl acetate/cyclohexane mixtures. Crystallization from diethyl ether/hexane resulted in 11.8 g (90%) of the product as colorless crystals.

Workup

extractionextracted twice with 30 ml of diethyl ether
dry with materialthe organic phase was dried over MgSO4
concentrationconcentrated
customthe residue was purified by chromatography on silica gel with ethyl acetate/cyclohexane mixtures
customCrystallization from diethyl ether/hexane

Sources & evidence

ORD record: ord-9981eb5c2fc342809771c1297032b1d5
Source dataset: uspto-grants-2003_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06610691B1

Reaction notes

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