Potassium Carbonate → HCID 21031122, compound

HRID 1296552Notes

Reaction equation

[CH2:1]([O:8][C:9](=[O:22])[NH:10][CH2:11][CH2:12][CH2:13][CH2:14][C:15]1[CH:20]=[CH:19][C:18]([OH:21])=[CH:17][CH:16]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.Br[CH2:24][CH2:25][CH2:26][C:27]#[N:28].C(=O)([O-])[O-].[K+].[K+]>CN(C=O)C>[CH2:1]([O:8][C:9](=[O:22])[NH:10][CH2:11][CH2:12][CH2:13][CH2:14][C:15]1[CH:20]=[CH:19][C:18]([O:21][CH2:24][CH2:25][CH2:26][C:27]#[N:28])=[CH:17][CH:16]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

Conditions

Temperature: 65 °C

Procedure

A mixture of [4-(4-hydroxyphenyl)butyl]carbamic acid benzyl ester 1 (2.00 g, 6.70 mmol), 4-bromobutyronitrile (0.70 mL, 6.70 mmol), and potassium carbonate (1.00 g, 7.4 mmol) in DMF (10 mL), was stirred at 65° C. for 16 h. Solvent was removed by rotary evaporation and the residue was taken up in ethyl acetate, washed with water and brine, and concentrated under vacuum. The crude product was purified by flash silica gel column chromatography eluting with ethyl acetate/CH2Cl2 (1:9, v/v) to give the desired product 2 as a white solid (1.80 g, 75% yield). 1H NMR (300 MHz, CDCl3) δ 1.56 (m, 4H), 2.15 (m, 2H), 2.55 (o, 4H), 3.15 (m, 2H), 4.00 (m, 2H), 4.70 (br s, 1H), 5.10 (s, 2H), 6.80 (d, 2H), 7.05 (d, 2H), 7.30 (m, 5H). m/z (ESI): 367 [C22H26N2O3+H]+.

Workup

customSolvent was removed by rotary evaporation
washwashed with water and brine
concentrationconcentrated under vacuum
customThe crude product was purified by flash silica gel column chromatography
washeluting with ethyl acetate/CH2Cl2 (1:9, v/v)

Sources & evidence

ORD record: ord-c0bdbf988483479e9cdc13e721dae76e
Source dataset: uspto-grants-2007_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07247637B2

Reaction notes

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