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Homoallyl bromide → 2-(2,3-dihydro-6-methyl-4-oxo-5-phenyl-4H-1,3-oxazin-3-yl)-2-methylhept-6-en-3-ol

HRID 1274877
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인쇄 미리보기

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HRID 1274877 반응식
Br[CH2:2][CH2:3][CH:4]=[CH2:5].[Mg].[CH3:7][C:8]1[O:13][CH2:12][N:11]([C:14]([CH3:18])([CH3:17])[CH:15]=[O:16])[C:10](=[O:19])[C:9]=1[C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1.[Cl-].[NH4+]>O1CCCC1.C(OCC)(=O)C>[CH3:7][C:8]1[O:13][CH2:12][N:11]([C:14]([CH3:17])([CH:15]([OH:16])[CH2:5][CH2:4][CH:3]=[CH2:2])[CH3:18])[C:10](=[O:19])[C:9]=1[C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1
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참가 물질

7

반응물 4

HCID 21241Homoallyl bromide2회HCID 25517Ammonium ChlorideHCID 5462224MagnesiumHCID 221182842-(2,3-dihydro-6-methyl-4-oxo-5-phenyl-4H-1,3-oxazin-3-yl)-2-methylpropionaldehyde

생성물 1

HCID 221183422-(2,3-dihydro-6-methyl-4-oxo-5-phenyl-4H-1,3-oxazin-3-yl)-2-methylhept-6-en-3-ol수율 145.5%

시약·촉매·용매 2

HCID 8028
Tetrahydrofuran
용매
3회
HCID 8857Ethyl Acetate용매

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온도
-5 °C

실험 절차

4-Bromobut-1-ene (approximately 0.2 g) was added to a suspension of magnesium (0.17 g) in tetrahydrofuran, under an inert atmosphere at 20° C. Once the reaction had initiated, further 4-bromobut-1-ene (approximately 0.67 g) in tetrahydrofuran was added over 10 minutes. After refluxing for 1 hour, the mixture was cooled to -5° C. and a solution of 2-(2,3-dihydro-6-methyl-4-oxo-5-phenyl-4H-1,3-oxazin-3-yl)-2-methylpropionaldehyde (1.00 g) in tetrahydrofuran was added over 20 minutes. After stirring for 18 hours, ammonium chloride and ethyl acetate were added and the organic phase washed (brine), dried (magnesium sulphate) and evaporated to give 2-(2,3-dihydro-6-methyl-4-oxo-5-phenyl-4H-1,3-oxazin-3-yl)-2-methylhept-6-en-3-ol (0.68 g) as a white solid, m.p. 74-75° C.

후처리

  1. temperatureAfter refluxing for 1 hour
  2. washthe organic phase washed (brine)
  3. dry with materialdried (magnesium sulphate)
  4. customevaporated

출처 및 근거

ORD 기록
ord-63379e61848a4bde93aa86cb7eadc988
출처 데이터셋
uspto-grants-2000_12
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US06159902

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