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Cesium carbonate → Methyl 5-[(2-methoxyethyl)(methyl)amino]-3-methyl-1-benzofuran-2-carboxylate

HRID 2091396
ノート
印刷プレビュー

反応式

HRID 2091396 の反応式
Br[C:2]1[CH:3]=[CH:4][C:5]2[O:9][C:8]([C:10]([O:12][CH3:13])=[O:11])=[C:7]([CH3:14])[C:6]=2[CH:15]=1.[CH3:16][O:17][CH2:18][CH2:19][NH:20][CH3:21].C(=O)([O-])[O-].[Cs+].[Cs+].CC1(C)C2C=CC=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=2OC2C1=CC=CC=2P(C1C=CC=CC=1)C1C=CC=CC=1>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]>[CH3:16][O:17][CH2:18][CH2:19][N:20]([CH3:21])[C:2]1[CH:3]=[CH:4][C:5]2[O:9][C:8]([C:10]([O:12][CH3:13])=[O:11])=[C:7]([CH3:14])[C:6]=2[CH:15]=1
参加物実験手順後処理出典と根拠反応ノート

参加物

7

反応物 4

HCID 10796Cesium carbonateHCID 300977(2-Methoxyethyl)(methyl)amineHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 42967109Methyl 5-bromo-3-methylbenzofuran-2-carboxylate

生成物 1

HCID 66778759Methyl 5-[(2-methoxyethyl)(methyl)amino]-3-methyl-1-benzofuran-2-carboxylate

試薬・触媒・溶媒 2

HCID 9811564
Bis(dibenzylideneacetone)palladium
触媒
HCID 1140Toluene溶媒

実験手順

To a solution (50 mL) of methyl 5-bromo-3-methyl-1-benzofuran-2-carboxylate (2.7 g) synthesized in Example A186(1) in toluene were added 2-methoxy-N-methylethanamine (2.7 g), cesium carbonate (9.8 g), tris(dibenzylideneacetone)dipalladium (0) (0.69 g) and 9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene (0.87 g), and the mixture was heated under reflux under argon atmosphere for 6 hr. The reaction mixture was cooled to room temperature, and filtered through celite, water was added to the filtrate, and the mixture was extracted with ethyl acetate. The extract was concentrated, and the residue was purified by silica gel column chromatography (ethyl acetate:hexane=1:4, volume ratio) to give the title object compound (2.7 g, quantitative) as a yellow oil.

後処理

  1. temperaturethe mixture was heated
  2. temperatureunder reflux under argon atmosphere for 6 hr
  3. filtrationfiltered through celite, water
  4. additionwas added to the filtrate
  5. extractionthe mixture was extracted with ethyl acetate
  6. concentrationThe extract was concentrated
  7. customthe residue was purified by silica gel column chromatography (ethyl acetate:hexane=1:4, volume ratio)
  8. customto give the title object compound (2.7 g, quantitative) as a yellow oil

出典と根拠

ORDレコード
ord-66e70fd064f54cc49d479bbc0ec463e0
出典データセット
uspto-grants-2013_05
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US08436043B2

反応ノート

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