N-Bromosuccinamide → 5-(5-Bromooxazol-2-yl)-2-isopropoxybenzonitrile

HRID 1807592노트

반응식

HRID 1807592 반응식
[O:1]1[CH2:5][CH2:4][N:3]=[C:2]1[C:6]1[CH:7]=[CH:8][C:9]([O:14][CH:15]([CH3:17])[CH3:16])=[C:10]([CH:13]=1)[C:11]#[N:12].[Br:18]NC(=O)CCC(N)=O>C(Cl)(Cl)(Cl)Cl>[Br:18][C:5]1[O:1][C:2]([C:6]2[CH:7]=[CH:8][C:9]([O:14][CH:15]([CH3:17])[CH3:16])=[C:10]([CH:13]=2)[C:11]#[N:12])=[N:3][CH:4]=1

참가 물질

4

반응물 2

HCID 9834204N-BromosuccinamideHCID 583549695-(4,5-Dihydrooxazol-2-yl)-2-isopropoxybenzonitrile

생성물 1

HCID 583549795-(5-Bromooxazol-2-yl)-2-isopropoxybenzonitrile수율 55%

시약·촉매·용매 1

HCID 5943Carbon Tetrachloride용매

실험 절차

A stirring solution of 5-(4,5-dihydrooxazol-2-yl)-2-isopropoxybenzonitrile INT-31 (420 mg, 1.82 mmol), N-bromosuccinamide (990 mg, 5.56 mmol) and azoisobutyronitrile (14.9 mg, 0.09 mmol) in carbon tetrachloride (20 mL) was heated at 80° C. under N2 for 18 h. The reaction mixture was cooled to room temperature and the solids were removed by filtration. The filtrate was washed with sodium thiosulfate (20 mL) and brine (20 mL), and dried over MgSO4. The product was purified by chromatography (EA/hexanes) to afford 300 mg (55%) of 5-(5-bromooxazol-2-yl)-2-isopropoxybenzonitrile INT-32 as a yellow solid. LCMS-ESI (m/z) calculated for C13H11BrN2O2: 307.1; found 309.0 [M+2]+, tR=3.79 min. 1H NMR (400 MHz, CDCl3) δ 8.19-7.93 (m, 2H), 7.08-6.85 (m, 2H), 4.81-4.47 (m, 1H), 1.38 (dd, J=6.6, 3.0 Hz, 6H).

후처리

  1. customthe solids were removed by filtration
  2. washThe filtrate was washed with sodium thiosulfate (20 mL) and brine (20 mL)
  3. dry with materialdried over MgSO4
  4. customThe product was purified by chromatography (EA/hexanes)

출처 및 근거

ORD 기록
ord-e5f5f220f02e4e84b18d783926685aae
출처 데이터셋
uspto-grants-2013_01
특허 번호
US08357706B2

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