Ethyl Acrylate → 1,2-Diethyl (1R,2R)-1,2-cyclopropanedicarboxylate

HRID 1610055

反応式

HRID 1610055 の反応式
[C:1]([O:5][CH2:6][CH3:7])(=[O:4])[CH:2]=[CH2:3].[CH2:8]([O:10][C:11]([CH2:13][S+](C)C)=[O:12])[CH3:9]>C(Cl)(Cl)Cl>[CH2:8]([O:10][C:11]([C@@H:13]1[CH2:3][C@H:2]1[C:1]([O:5][CH2:6][CH3:7])=[O:4])=[O:12])[CH3:9]

参加物

4

反応物 2

HCID 8821Ethyl AcrylateHCID 78862(Ethoxycarbonylmethyl)dimethylsulfonium

生成物 1

HCID 117153031,2-Diethyl (1R,2R)-1,2-cyclopropanedicarboxylate収率 80.6%

試薬・触媒・溶媒 1

HCID 6212Chloroform溶媒

反応条件

温度
22 °C

実験手順

Ethyl acrylate (99%, 270 g, 1.4 eq.) was added to a solution of 2 (282 g, 1.91 mol) in CHCl3 (1500 mL) at 5° C. Cooling was removed and the reaction was stirred at 22° C. for 12 h. Evaporation of the solvent and excess acrylate left an orange oil, which was vacuum distilled (bp 70-75° C./1 mm) to produce 3 (286 g, 80.6%) as a clear thick oil. 1H NMR (250 MHz, CDCl3) δ4.15 (q, J=7.1, 4H); 2.16 (dd, J=7.5, 5.7, 2H); 1.41 (dd, J=7.5, 5.7, 2H); 0.88 (t, J=7.1, 6H). 13C NMR (62.5 MHz, CDCl3) δ171.69; 60.96; 22.26; 15.18; 14.08.

後処理

  1. temperatureCooling
  2. customwas removed
  3. customEvaporation of the solvent and excess acrylate
  4. waitleft an orange oil, which
  5. distillationdistilled (bp 70-75° C./1 mm)

出典と根拠

ORDレコード
ord-da04d6adc00849c0aaf9c2d3a1552d6e
出典データセット
uspto-grants-2006_01
特許番号
US06982351B2

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