Potassium Hydroxide → 1-Amino-3-benzoylpyrrole

HRID 22407

반응식

HRID 22407 반응식
[C:1]([C:9]1[CH:13]=[CH:12][NH:11][CH:10]=1)(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[OH-].[K+].[NH2:16]OS(O)(=O)=O>CN(C)C=O.O>[NH2:16][N:11]1[CH:12]=[CH:13][C:9]([C:1]([C:2]2[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=2)=[O:8])=[CH:10]1

참가 물질

6

반응물 3

HCID 14797Potassium HydroxideHCID 76284hydroxylamine-O-sulfonic acidHCID 27732343-Benzoylpyrrole

생성물 1

HCID 199731561-Amino-3-benzoylpyrrole

시약·촉매·용매 2

HCID 962Water용매HCID 6228Dimethylformamide용매

실험 절차

To a solution of 3-benzoylpyrrole (4.92 g) in 50 ml of dry dimethylformamide was added milled potassium hydroxide (8.06 g). Hydroxylamine-O-sulfonic acid (4.23 g) was added to the suspension in 4 portions over a period of 1 hour with stirring at room temperature. After the addition was completed the reaction mixture was stirred for 30 minutes at room temperature, and subsequently diluted with 50 ml of water and extracted with DCM. The combined organic layers were washed with water, dried over magnesium sulfate and evaporated in vacuo. The residue was purified by flash column chromatography (silica gel, DCM/ethyl acetate, 5:1), affording starting material (1.44 g) and the desired product as the second fraction. Recrystallization from ethyl ether/hexane gave the product as crystals (1.80 g), which was combined with material obtained from a 36.9 mmol scale reaction and recrystallized from DCM/hexane affording 3.20 g of crystals, m.p. 82°-83° C.

후처리

  1. additionAfter the addition
  2. stirringwas stirred for 30 minutes at room temperature
  3. extractionextracted with DCM
  4. washThe combined organic layers were washed with water
  5. dry with materialdried over magnesium sulfate
  6. customevaporated in vacuo
  7. customThe residue was purified by flash column chromatography (silica gel, DCM/ethyl acetate, 5:1)
  8. customaffording

출처 및 근거

ORD 기록
ord-10b426337f1a4e8d857367c3d6f38ad1
출처 데이터셋
uspto-grants-1995_06
특허 번호
US05428053

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