Carbon tetrabromide → 5-(Bromomethyl)thiophene-2-carbonitrile

HRID 724894

반응식

HRID 724894 반응식
[C:1]([C:3]1[S:4][C:5]([CH2:8]O)=[CH:6][CH:7]=1)#[N:2].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C(Br)(Br)(Br)[Br:30]>C1COCC1>[C:1]([C:3]1[S:4][C:5]([CH2:8][Br:30])=[CH:6][CH:7]=1)#[N:2]

참가 물질

5

반응물 3

HCID 11205Carbon tetrabromideHCID 11776TriphenylphosphineHCID 106068135-(Hydroxymethyl)thiophene-2-carbonitrile

생성물 1

HCID 105600165-(Bromomethyl)thiophene-2-carbonitrile수율 75%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

실험 절차

To a solution of 2-cyano-5-(hydroxymethyl)thiophene (6.0 g, 43 mmol) in THF (50 mL) was added triphenylphosphine (15.7 g, 47 mmol) and carbon tetrabromide (12.3 g, 47 mmol). After stirring overnight under nitrogen atmosphere at room temperature, the solvent was removed in vacuo and the residue was dissolved in chloroform, then adsorbed onto silica gel and loaded onto a silica gel column. The product was eluted using an ethyl acetate/hexanes gradient. Fractions containing pure product (as judged by TLC) were pooled and concentrated in vacuo to give 6.5 g (75%) of 2-cyano-5-(bromomethyl)thiophene.

후처리

  1. customthe solvent was removed in vacuo
  2. dissolutionthe residue was dissolved in chloroform
  3. washThe product was eluted
  4. additionFractions containing pure product (as judged by TLC)
  5. concentrationconcentrated in vacuo

출처 및 근거

ORD 기록
ord-ec9bf3d9edc344c28ed34dab6b67bd68
출처 데이터셋
uspto-grants-1998_01
특허 번호
US05705487

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