Tosylmethyl isocyanide → 3-(3,4-Dichlorophenyl)-4-nitro-1H-pyrrole

HRID 1033587노트

반응식

HRID 1033587 반응식
[Cl:1][C:2]1[CH:3]=[C:4]([CH:10]=[CH:11][C:12]=1[Cl:13])[CH:5]=[CH:6][N+:7]([O-:9])=[O:8].C1(C)C=CC(S([CH2:23][N+:24]#[C-:25])(=O)=O)=CC=1>CS(C)=O.CCOCC.O>[Cl:1][C:2]1[CH:3]=[C:4]([C:5]2[C:6]([N+:7]([O-:9])=[O:8])=[CH:25][NH:24][CH:23]=2)[CH:10]=[CH:11][C:12]=1[Cl:13]

참가 물질

6

반응물 2

HCID 161915Tosylmethyl isocyanideHCID 2362903,4-Dichloro-beta-nitrostyrene

생성물 1

HCID 4704323-(3,4-Dichlorophenyl)-4-nitro-1H-pyrrole수율 212.2%

시약·촉매·용매 3

HCID 679Dimethyl Sulfoxide용매HCID 962Water용매HCID 3283Diethyl Ether용매2회

실험 절차

Sodium hydride (2.66 g of a 60% suspension in oil is rinsed with dry ether; 66 mmol) and suspended in 150 mL of dry ether. To this mixture is added over 15 minutes a mixture of 12.0 g (5.5 mmol) of 3,4-dichloro-β-nitrostyrene and 10.8 g (5.5 mmol) of (p-tolylsulfonyl)methyl isocyanide in 50 mL of DMSO and 150 mL of ether. The mixture is stirred for 1.5 hours and then diluted with 150-200 mL of water and additional ether. The ether layer is separated, dried over magnesium sulfate, and concentrated in vacuo. The resulting 10.6 g of crude product is purified by chromatography on silica gel using a 4:1 mixture of chloroform and ethyl acetate. A 7.2 g solid fraction is recrystallized from chloroform-ethyl acetate-hexane to give 3.0 g of yellow solid, m.p. 187°-188° C. (dec.).

후처리

  1. washSodium hydride (2.66 g of a 60% suspension in oil is rinsed with dry ether
  2. additionTo this mixture is added over 15 minutes
  3. customThe ether layer is separated
  4. dry with materialdried over magnesium sulfate
  5. concentrationconcentrated in vacuo
  6. customThe resulting 10.6 g of crude product is purified by chromatography on silica gel using
  7. additiona 4:1 mixture of chloroform and ethyl acetate
  8. customA 7.2 g solid fraction is recrystallized from chloroform-ethyl acetate-hexane

출처 및 근거

ORD 기록
ord-57c783b9bc6f4a04b860d92957bf36ae
출처 데이터셋
uspto-grants-1994_05
특허 번호
US05310938

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