Methacrylic anhydride → Methacrylic Acid

HRID 1816081

반응식

HRID 1816081 반응식
[C:1]([O:6][C:7](=O)[C:8](C)=C)(=[O:5])[C:2]([CH3:4])=[CH2:3].OC(=C)C([O-])=O>>[C:1]([O:6][CH2:7][CH3:8])(=[O:5])[C:2]([CH3:4])=[CH2:3].[C:1]([OH:6])(=[O:5])[C:2]([CH3:4])=[CH2:3]

참가 물질

4

반응물 2

HCID 12974Methacrylic anhydride2회HCID 178473601HCID 178473601, 화합물

생성물 2

HCID 4093Methacrylic AcidHCID 7343Ethyl Methacrylate

실험 절차

It is just as possible to use an excess of methacrylic anhydride, for example 20 mol %. In this case, after the reaction of the hydroxyacrylate (II) is as complete as possible, the excess methacrylic anhydride is destroyed by adding a low molecular weight alcohol such as methanol, ethanol, or isopropanol. This method is particularly recommended with longer-chained compounds (n=3-100). The excess methacrylic anhydride guarantees the most complete possible conversion of the hydroxy compound; the subsequent reaction of the methacrylic anhydride to give ethyl methacrylate and methacrylic acid, for example, ensures easier separation of these components with lower boiling points than methacrylic anhydride.

후처리

  1. customis destroyed
  2. additionby adding a low molecular weight alcohol such as methanol, ethanol, or isopropanol
  3. customthe subsequent reaction of the methacrylic anhydride

출처 및 근거

ORD 기록
ord-6e3c636e6f1c475e867cf99c7cef1fe1
출처 데이터셋
uspto-grants-2005_04
특허 번호
US06881858B2

연결된 노트

불러오는 중…