Isothiocyanatotrimethylsilane → 6-(2,6-Dimethoxypyridin-3-yl)-1-(2-hydroxyethyl)-2-thioxo-2,3-dihydropyrimidin-4(1H)-one

HRID 1056514Notes

Reaction equation

[CH3:1][O:2][C:3]1[C:8](/[C:9](/[NH:16][CH2:17][CH2:18][OH:19])=[CH:10]/[C:11]([O:13]CC)=O)=[CH:7][CH:6]=[C:5]([O:20][CH3:21])[N:4]=1.C[Si]([N:26]=[C:27]=[S:28])(C)C>CC1OCCC1.CCOC(C)=O>[CH3:1][O:2][C:3]1[C:8]([C:9]2[N:16]([CH2:17][CH2:18][OH:19])[C:27](=[S:28])[NH:26][C:11](=[O:13])[CH:10]=2)=[CH:7][CH:6]=[C:5]([O:20][CH3:21])[N:4]=1

Participants

Conditions

Temperature: 80 °C

Procedure

To a solution of (Z)-ethyl 3-(2,6-dimethoxypyridin-3-yl)-3-((2-hydroxyethyl)amino)acrylate (100 mg, 0.34 mmol) in 2-MeTHF (1.0 mL) was added (trimethylsilyl)isothiocyanate (0.30 mL, 2.0 mmol) and the reaction mixture was heated at 80° C. for 4 hours. The cooled reaction mixture was diluted with EtOAc and washed with a saturated aqueous sodium bicarbonate solution. The layers were separated and the organic layer was concentrated in vacuo. The residue was triturated with MeOH and the resulting solids were collected by vacuum filtration to give the title compound (16 mg, 16%) as a white solid.

Workup

customThe cooled reaction mixture
washwashed with a saturated aqueous sodium bicarbonate solution
customThe layers were separated
concentrationthe organic layer was concentrated in vacuo
customThe residue was triturated with MeOH
filtrationthe resulting solids were collected by vacuum filtration

Sources & evidence

ORD record: ord-2ac4b62b917549a2a8cd32dc63bd65b5
Source dataset: uspto-grants-2016_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09399626B2

Reaction notes

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