反応式
[C:1](=[O:3])=[O:2].C([CH2:6][CH2:7][CH2:8][CH2:9][C:10]([O:12]C)=[O:11])=O.C(OC)(=O)CCCCC([O-])=O>>[CH3:6][CH:7]([CH2:8][CH2:9][C:10]([OH:12])=[O:11])[C:1]([OH:3])=[O:2]参加物
実験手順
The cleavage in stage (c) is advantageously carried out in the presence of molecular oxygen or a gas which contains molecular oxygen and an inert gas, such as nitrogen, carbon dioxide, argon or steam. A molar ratio of formylvaleric esters to molecular oxygen of from 1:0.05 to 1:3, in particular from 1:0.2 to 1:1.5, e.g., from 1:0.25 to 1:1.25, is advantageously used. This increases the catalyst life and in particular the yield of pentenoic esters. The presence of molecular oxygen was not indicated since methyl 5-formylvalerate is oxidized to monomethyl adipate in a yield of 96% by molecular oxygen at as low as 50° C., as disclosed in European Patent 131,860, and it was therefore to be expected that 4- and 3-formylvaleric esters would be oxidized in a similar manner to give 2-methylglutaric acid and 3-ethylsuccinic esters.
後処理
- temperatureThis increases the catalyst life
出典と根拠
- ORDレコード
- ord-b40f2f7ca4574b5c9d20c335587813c3
- 出典データセット
- uspto-grants-1991_03
- 特許番号
- US05003102
関連ノート
読み込み中…