Ethyl bromoacetate → ethyl 2-(2-cyano-3,5-dimethyl-4-(2-(pyrrolidin-1-ylsulfonyl)benzyl)-1H-pyrrol-1-yl)acetate

HRID 1189554Notes

Reaction equation

[CH3:1][C:2]1[C:6]([CH2:7][C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=2[S:14]([N:17]2[CH2:21][CH2:20][CH2:19][CH2:18]2)(=[O:16])=[O:15])=[C:5]([CH3:22])[NH:4][C:3]=1[C:23]#[N:24].C(=O)([O-])[O-].[Cs+].[Cs+].Br[CH2:32][C:33]([O:35][CH2:36][CH3:37])=[O:34]>CCCC[N+](CCCC)(CCCC)CCCC.[I-].CN(C=O)C.C(OCC)(=O)C>[C:23]([C:3]1[N:4]([CH2:32][C:33]([O:35][CH2:36][CH3:37])=[O:34])[C:5]([CH3:22])=[C:6]([CH2:7][C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=2[S:14]([N:17]2[CH2:21][CH2:20][CH2:19][CH2:18]2)(=[O:16])=[O:15])[C:2]=1[CH3:1])#[N:24]

Participants

Conditions

Temperature: 60 °C

Procedure

To a mixture of 3,5-dimethyl-4-(2-(pyrrolidin-1-ylsulfonyl)benzyl)-1H-pyrrole-2-carbonitrile (29.1 mg, 0.085 mmol), cesium carbonate (110 mg, 0.339 mmol), and TBAI (3.13 mg, 8.47 μmol) in DMF (424 μl), was added ethyl bromoacetate (14.15 μl, 0.127 mmol). The mixture was heated at 60° C. for 5 hours and then allowed to cool down to room temperature and diluted with ethyl acetate (100 ml). The resulting mixture was washed with water (50 ml×3), dried, filtered, and evaporated to give an oil. This crude oil was purified by column chromatography (0 to 50% ethyl acetate in hexanes) to give ethyl 2-(2-cyano-3,5-dimethyl-4-(2-(pyrrolidin-1-ylsulfonyl)benzyl)-1H-pyrrol-1-yl)acetate (40.0 mg, 0.093 mmol, 110% yield).

Workup

temperatureto cool down to room temperature
washThe resulting mixture was washed with water (50 ml×3)
customdried
filtrationfiltered
customevaporated
customto give an oil
customThis crude oil was purified by column chromatography (0 to 50% ethyl acetate in hexanes)

Sources & evidence

ORD record: ord-9c247d32685a4bf6abd66a6325ea1818
Source dataset: uspto-grants-2014_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08674115B2

Reaction notes

Loading…