Salicylamide → 2,2-dibutyl-4-oxo-2,3-dihydro-4H-1,3-benzoxazine

HRID 1756886

반응식

HRID 1756886 반응식
[CH2:1]([C:5]([CH2:7][CH2:8][CH2:9][CH3:10])=[O:6])[CH2:2][CH2:3][CH3:4].[C:11]([NH2:20])(=[O:19])[C:12]1[C:13](=[CH:15][CH:16]=[CH:17][CH:18]=1)O.O.C1(C)C=CC(S(O)(=O)=O)=CC=1>C1(C)C=CC=CC=1>[CH2:1]([C:5]1([CH2:7][CH2:8][CH2:9][CH3:10])[NH:20][C:11](=[O:19])[C:12]2[CH:13]=[CH:15][CH:16]=[CH:17][C:18]=2[O:6]1)[CH2:2][CH2:3][CH3:4]

참가 물질

5

반응물 3

HCID 5147SalicylamideHCID 104055-NonanoneHCID 521998p-Toluenesulfonic acid monohydrate

생성물 1

HCID 100840172,2-dibutyl-4-oxo-2,3-dihydro-4H-1,3-benzoxazine수율 92.5%

시약·촉매·용매 1

HCID 1140Toluene용매

실험 절차

A mixture of 20 g of dibutylketone, 19.3 g of salicylamide and 2.7 g of p-toluenesulfonic acid monohydrate is added to 300 ml of toluene and the mixture is refluxed overnight by making use of a dehydrator of Dean Stark. After cooling, the reaction mixture is washed, dried and evaporated to remove the solvent. The residue is purified by silica gel column chromatography (solvent; hexane:ethyl acetate =95:5) to obtain 34 g of 2,2-dibutyl-4-oxo-2,3-dihydro-4H-1,3-benzoxazine as a yellow oil.

후처리

  1. temperaturethe mixture is refluxed overnight
  2. temperatureAfter cooling
  3. washthe reaction mixture is washed
  4. customdried
  5. customevaporated
  6. customto remove the solvent
  7. customThe residue is purified by silica gel column chromatography (solvent; hexane:ethyl acetate =95:5)

출처 및 근거

ORD 기록
ord-9efcac42f446489ba5cf5243c6c30bd3
출처 데이터셋
uspto-grants-1995_08
특허 번호
US05442055

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