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Ethyl Acetate → 2-Fluoro-3-methoxy-4-nitrobenzonitrile

HRID 914202
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인쇄 미리보기

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HRID 914202 반응식
Br[C:2]1[CH:7]=[CH:6][C:5]([N+:8]([O-:10])=[O:9])=[C:4]([O:11][CH3:12])[C:3]=1[F:13].[CH3:14][N:15](C1C(C2C(P(C3CCCCC3)C3CCCCC3)=CC=CC=2)=CC=CC=1)C.C(OCC)(=O)C>CC(N(C)C)=O.[Pd].[C-]#N.[Zn+2].[C-]#N.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[F:13][C:3]1[C:4]([O:11][CH3:12])=[C:5]([N+:8]([O-:10])=[O:9])[CH:6]=[CH:7][C:2]=1[C:14]#[N:15]
참가 물질반응 조건실험 절차후처리출처 및 근거반응 노트

참가 물질

8

반응물 3

HCID 8857Ethyl AcetateHCID 27342172-(Dicyclohexylphosphino)-2'-(dimethylamino)biphenylHCID 579555891-Bromo-2-fluoro-3-methoxy-4-nitrobenzene

생성물 1

HCID 579555492-Fluoro-3-methoxy-4-nitrobenzonitrile수율 433.4%

시약·촉매·용매 4

HCID 11186Zinc cyanide (Zn(CN)2)촉매
HCID 23938
Palladium
촉매
HCID 9811564Bis(dibenzylideneacetone)palladium촉매
HCID 31374Dimethylacetamide용매

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온도
90 °C

실험 절차

A mixture of 1-Bromo-2-fluoro-3-methoxy-4-nitrobenzene (250 mg, 1 mmol) and zinc cyanide (70 mg, 0.6 mmol) were stirred in DMA (5 mL) and purged with nitrogen. The palladium catalyst, Pd2(dba)3 (92 mg, 0.1 mmol), and the ligand, Davephos (79 mg, 0.2 mmol), were added and the reaction mixture was stirred at 90° C. overnight. It was then cooled to rt., diluted to ethyl acetate, washed with brine. Organic dried, concentrated and purified by flash column (EtOAc/Hexane=1:20) to give 170 mg product (87%). 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 4.15 (s, 3H) 7.42 (dd, J=9.0, 6.2 Hz, 1H) 7.65 (dd, J=9.0, 1.9 Hz, 1H).

후처리

  1. custompurged with nitrogen
  2. temperatureIt was then cooled to rt
  3. washwashed with brine
  4. concentrationOrganic dried, concentrated
  5. custompurified by flash column (EtOAc/Hexane=1:20)

출처 및 근거

ORD 기록
ord-ecf7fdda55034b4fafd34377b486264c
출처 데이터셋
uspto-grants-2011_09
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US08026234B2

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