Hydrochloric Acid → 5-(5-Chloro-2-nitrophenyl)-4-pentynoic acid methyl ester

HRID 2089716노트

반응식

HRID 2089716 반응식
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([N+:8]([O-:10])=[O:9])=[C:4](I)[CH:3]=1.[CH2:12](N(CC)CC)C.[C:19]([OH:25])(=[O:24])[CH2:20][CH2:21][C:22]#[CH:23].Cl>C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.C(OCC)(=O)C.C1(C)C=CC=CC=1.CN(C)C=O>[CH3:12][O:24][C:19](=[O:25])[CH2:20][CH2:21][C:22]#[C:23][C:4]1[CH:3]=[C:2]([Cl:1])[CH:7]=[CH:6][C:5]=1[N+:8]([O-:10])=[O:9]

참가 물질

9

반응물 4

HCID 313Hydrochloric AcidHCID 8471TriethylamineHCID 224644-Pentynoic acidHCID 114261004-Chloro-2-iodo-1-nitrobenzene

생성물 1

HCID 686777865-(5-Chloro-2-nitrophenyl)-4-pentynoic acid methyl ester

시약·촉매·용매 4

HCID 178418397HCID 178418397, 화합물촉매HCID 1140Toluene용매HCID 6228Dimethylformamide용매HCID 8857Ethyl Acetate용매

실험 절차

35.5 g (125 mM) of 4-chloro-2-iodo-1-nitrobenzene, 510 ml of triethylamine, 2.88 g (2.5 mM) of tetrakis(triphenylphosphine)palladium, 0.72 g of cuprous iodide and 50 ml of dimethylformamide (DMF) are mixed. 14 g (125 mM) of the methyl ester of 4-pentynoic acid are then added at room temperature, with stirring, and the reaction mixture is stirred for 24 hours at room temperature. 100 ml of toluene are added and the solvents are driven off under reduced pressure. The evaporation residue is taken up with 150 ml of ethyl acetate and 80 ml of N hydrochloric acid. The organic phase is separated off, washed with water and then dried over magnesium sulfate and concentrated under reduced pressure. The brown oil obtained is purified by chromatography on silica gel using a cyclohexane/ethyl acetate mixture (9/1; v/v) as the eluent to give 21.5 g of the expected product in the form of a yellow solid (yield=65%).

후처리

  1. stirringthe reaction mixture is stirred for 24 hours at room temperature
  2. customThe organic phase is separated off
  3. washwashed with water
  4. dry with materialdried over magnesium sulfate
  5. concentrationconcentrated under reduced pressure
  6. customThe brown oil obtained
  7. customis purified by chromatography on silica gel using a cyclohexane/ethyl acetate mixture (9/1; v/v) as the eluent

출처 및 근거

ORD 기록
ord-6652bd1a71fc45238fe221998f228597
출처 데이터셋
uspto-grants-2013_05
특허 번호
US08436040B2

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