3-Hydroxybenzaldehyde → Methyl 2-(tert-butoxycarbonylamino)-3-(3-hydroxyphenyl)acrylate

HRID 449503

反応式

HRID 449503 の反応式
[C:1]([O:5][C:6]([NH:8][CH:9](P(OC)(OC)=O)[C:10]([O:12][CH3:13])=[O:11])=[O:7])([CH3:4])([CH3:3])[CH3:2].[OH:20][C:21]1[CH:22]=[C:23]([CH:26]=[CH:27][CH:28]=1)[CH:24]=O.C1CCN2C(=NCCC2)CC1>C(Cl)Cl.C(OCC)(=O)C>[C:1]([O:5][C:6]([NH:8][C:9](=[CH:24][C:23]1[CH:26]=[CH:27][CH:28]=[C:21]([OH:20])[CH:22]=1)[C:10]([O:12][CH3:13])=[O:11])=[O:7])([CH3:2])([CH3:3])[CH3:4]

参加物

6

反応物 3

HCID 1013-HydroxybenzaldehydeHCID 811841,8-Diazabicyclo(5.4.0)undec-7-eneHCID 397380Methyl ((tert-butoxy(hydroxy)methylidene)amino)(dimethoxyphosphoryl)acetate

生成物 1

HCID 67542936Methyl 2-(tert-butoxycarbonylamino)-3-(3-hydroxyphenyl)acrylate収率 96%

試薬・触媒・溶媒 2

HCID 6344Dichloromethane溶媒HCID 8857Ethyl Acetate溶媒

実験手順

Methyl [(tert-butoxycarbonyl)amino](dimethoxyphosphoryl)acetate (Fluka, Cat. #09659) (0.97 g, 3.3 mmol) and 3-hydroxybenzaldehyde (0.400 g, 3.28 mmol) were combined in methylene chloride (14 mL) at r.t. under nitrogen. To this DBU (0.68 mL, 3.9 mmol) was added and the reaction was stirred at r.t. for 2 h. The reaction was taken up in ethyl acetate, washed with 1 N HCl, brine, dried over magnesium sulfate and concentrated under reduced pressure to give the crude product as an oil. The product was purified by Flash chromatography on a silica gel column eluting hexane: ethyl acetate gradient to give methyl 2-(tert-butoxycarbonylamino)-3-(3-hydroxyphenyl)acrylate (0.92 g, 96%) as a clear oil Analytical LCMS (M+H-Boc)+: m/z=193.9.

後処理

  1. washwashed with 1 N HCl, brine
  2. dry with materialdried over magnesium sulfate
  3. concentrationconcentrated under reduced pressure
  4. customto give the crude product as an oil
  5. customThe product was purified by Flash chromatography on a silica gel column
  6. washeluting hexane

出典と根拠

ORDレコード
ord-c0676be429e740f2b8ede788a3d1cdd5
出典データセット
uspto-grants-2013_07
特許番号
US08481732B2

関連ノート

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