Water → (R)-7-benzyloxy-3-(4-benzyloxyphenyl)-3,4-dihydro-2H-benzo[1,4]oxazine

HRID 460461ノート

反応式

HRID 460461 の反応式
[CH2:1]([O:8][C:9]1[CH:10]=[CH:11][C:12](Br)=[C:13]([CH:32]=1)[O:14][CH2:15][C@H:16]([NH2:31])[C:17]1[CH:22]=[CH:21][C:20]([O:23][CH2:24][C:25]2[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=2)=[CH:19][CH:18]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C1(P(C2C=CC=CC=2)C2C=CC3C(=CC=CC=3)C=2C2C3C(=CC=CC=3)C=CC=2P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.CC(C)([O-])C.[K+].O>C1(C)C=CC=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].C(OCC)(=O)C.CCCCCC>[CH2:1]([O:8][C:9]1[CH:10]=[CH:11][C:12]2[NH:31][C@H:16]([C:17]3[CH:22]=[CH:21][C:20]([O:23][CH2:24][C:25]4[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=4)=[CH:19][CH:18]=3)[CH2:15][O:14][C:13]=2[CH:32]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

参加物

8

反応物 4

HCID 962WaterHCID 634876Binap, (A+-)-HCID 23665647Potassium tert-butoxideHCID 60086312(R)-2-(5-benzyloxy-2-bromophenoxy)-1-(4-benzyloxyphenyl)ethylamine

生成物 1

HCID 20726824(R)-7-benzyloxy-3-(4-benzyloxyphenyl)-3,4-dihydro-2H-benzo[1,4]oxazine収率 55%

試薬・触媒・溶媒 3

HCID 9811564Bis(dibenzylideneacetone)palladium触媒HCID 1140Toluene溶媒HCID 21226206Ethyl acetate hexane溶媒

実験手順

A solution of (R)-2-(5-benzyloxy-2-bromophenoxy)-1-(4-benzyloxyphenyl)ethylamine (120 mg, 0.238 mmol), tris(dibenzylideneacetone)dipalladium (11 mg, 0.012 mmol), 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl (15 mg, 0.024 mmol) and potassium-t-butoxide (37 mg, 0.330 mmol) in toluene (2.5 ml) was stirred for 3 hours at 100° C. under a nitrogen stream. After cooling, water was added to the reaction mixture, which was then extracted with ethyl acetate. The organic layer was washed with saturated aqueous sodium chloride, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (eluent: ethyl acetate/hexane=1/5, v/v) to give (R)-7-benzyloxy-3-(4-benzyloxy-phenyl)-3,4-dihydro-2H-benzo[1,4]oxazine (55.4 mg, Yield 55%).

後処理

  1. temperatureAfter cooling
  2. extractionwas then extracted with ethyl acetate
  3. washThe organic layer was washed with saturated aqueous sodium chloride
  4. dry with materialdried over anhydrous sodium sulfate
  5. concentrationconcentrated under reduced pressure
  6. customThe resulting residue was purified by silica gel column chromatography (eluent

出典と根拠

ORDレコード
ord-2389875375fb4571a49f6c19654818a2
出典データセット
uspto-grants-2007_03
特許番号
US07196081B2

反応ノート

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