1,1-Dibromoethane → 4,4-Dimethyl-2-(4'-tetrahydropyranyloxymethylbiphenyl-2-yl)oxazoline

HRID 53423

반응식

HRID 53423 반응식
[Mg].BrC(Br)C.BrC1C=CC(C[C:12]2([O:18][C:19]3([CH2:25][C:26]4[CH:31]=[CH:30][C:29](Br)=[CH:28]C=4)CCCCO3)[CH2:17][CH2:16][CH2:15][CH2:14][O:13]2)=CC=1.[CH3:35][C:36]1([CH3:49])[CH2:40][O:39][C:38]([C:41]2[CH:46]=[CH:45][CH:44]=[CH:43][C:42]=2OC)=[N:37]1.[Cl-].[NH4+]>O1CCCC1>[CH3:49][C:36]1([CH3:35])[CH2:40][O:39][C:38]([C:41]2[CH:46]=[CH:45][CH:44]=[CH:43][C:42]=2[C:30]2[CH:31]=[CH:26][C:25]([CH2:19][O:18][CH:12]3[CH2:17][CH2:16][CH2:15][CH2:14][O:13]3)=[CH:28][CH:29]=2)=[N:37]1

참가 물질

7

반응물 5

HCID 112011,1-DibromoethaneHCID 25517Ammonium ChlorideHCID 3331894,4-Dimethyl-2-(2-methoxyphenyl)oxazolineHCID 5462224Magnesium2회HCID 699599014-Bromobenzyl-tetrahydropyranyl ether

생성물 1

HCID 153808764,4-Dimethyl-2-(4'-tetrahydropyranyloxymethylbiphenyl-2-yl)oxazoline수율 53%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매2회

실험 절차

Tetrahybrofuran (15 ml) was added to 1.2 g (49.4 mmol) of flaky magnesium, followed by the addition of a small amount of dibromoethane under stirring. After the confirmation of bubbling, a solution of 11.0 g (40.6 mmol) of 4-bromobenzyl-tetrahydropyranyl ether in tetrahydrofuran (15 ml) was dropwise added thereto. After the confirmation of the dissolution of the magnesium, the resulting mixture was further stirred at room temperature for one hour. Then, a solution of 7.0 g (34.1 mmol) of 4,4-dimethyl-2-(2'-methoxyphenyl)oxazoline in tetrahydrofuran (5 ml) was dropwise added thereto, followed by stirring for 12 hours. The reaction liquid was poured into a saturated aqueous solution of ammonium chloride, followed by the extraction with chloroform. After washing with water and drying, vacuum concentration was conducted. The residue was purified by silica gel column chromatography (a n-hexane/ethyl acetate system) to give 6.61 g of the title compound as an oil (yield 53%).

후처리

  1. customAfter the confirmation of bubbling
  2. stirringthe resulting mixture was further stirred at room temperature for one hour
  3. stirringby stirring for 12 hours
  4. customThe reaction liquid
  5. extractionfollowed by the extraction with chloroform
  6. washAfter washing with water
  7. customdrying
  8. concentrationvacuum concentration
  9. customThe residue was purified by silica gel column chromatography (a n-hexane/ethyl acetate system)

출처 및 근거

ORD 기록
ord-949c5fbc74944bcb8b16754dc572d92c
출처 데이터셋
uspto-grants-1997_04
특허 번호
US05618969

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