Ethanol → 2-Ethoxalyloxyethyl methacrylate

HRID 6406

反応式

HRID 6406 の反応式
[C:1]([O:6][CH2:7][CH2:8][OH:9])(=[O:5])[C:2]([CH3:4])=[CH2:3].[C:10](OCC)(=[O:16])[C:11]([O:13][CH2:14][CH3:15])=[O:12].C(O)C>C([O-])(=O)CCCCCCCCCCC.C([O-])(=O)CCCCCCCCCCC.C([Sn+2]CCCC)CCC.C(C1C=C(O)C(C(C)(C)C)=CC=1O)(C)(C)C>[C:1]([O:6][CH2:7][CH2:8][O:9][C:10]([C:11]([O:13][CH2:14][CH3:15])=[O:12])=[O:16])(=[O:5])[C:2]([CH3:4])=[CH2:3]

参加物

6

反応物 3

HCID 702EthanolHCID 7268Diethyl OxalateHCID 133602-Hydroxyethyl Methacrylate

生成物 1

HCID 194284412-Ethoxalyloxyethyl methacrylate収率 73.2%

試薬・触媒・溶媒 2

HCID 23742,5-Di-tert-butylhydroquinone触媒HCID 9809426Di-n-butyldilauryltin触媒

実験手順

A 500 ml flask equipped with a decanter, a thermometer, a stirrer and an inlet for nitrogen gas was charged with 65.1 g (0.5 mol) of 2-hydroxyethyl methacrylate and 365.4 g (2.5 mol) of diethyl oxalate, to which 2 g (10 mmol) of dibutyltin dilaurate (catalyst) and 4 g of 2,5-di-t-butylhydroquinone (polymerization inhibitor) were added. The mixture was heated to keep it at about 120° C. for 2 hours in nitrogen atmosphere with distilling 32.5 ml (0.56 mol) of ethanol away. The reaction mixture was evaporated to remove excess diethyl oxalate and then distilled under vacuum to obtain 84.2 g (yield 73.2%) of 2-ethoxalyloxyethyl methacrylate (bp 124° C./0.4 mmHg).

後処理

  1. customA 500 ml flask equipped with a decanter
  2. additionwere added
  3. temperatureThe mixture was heated
  4. customat about 120° C.
  5. customfor 2 hours
  6. customThe reaction mixture was evaporated
  7. customto remove excess diethyl oxalate
  8. distillationdistilled under vacuum

出典と根拠

ORDレコード
ord-1e1b570bc8ce444bb33a68c096a4880b
出典データセット
uspto-grants-1993_09
特許番号
US05248749

関連ノート

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