Urea → 1,1-Dipropylurea
反応式
[NH2:1][C:2](N)=[O:3].[CH2:5]([NH:8][CH2:9][CH2:10][CH3:11])[CH2:6][CH3:7]>C1(C)C(C)=CC=CC=1>[CH2:5]([N:8]([CH2:9][CH2:10][CH3:11])[C:2]([NH2:1])=[O:3])[CH2:6][CH3:7]参加物
4
実験手順
180 g (3 mols) of urea are suspended in 500 ml of dry xylene. This is heated to an internal temperature of from 130° to 135° C. and a mixture of 303 g (3 mols) of dipropylamine and 250 ml of xylene is slowly introduced. When the reaction temperature has been reached, more dipropylamine mixture is added, with stirring. When all of the amine solution has been added, the reaction mixture is concentrated to half its volume. It is then left to cool to room temperature and the crystallized reaction product is separated by suction filtration. 345 g (80% of the theoretical yield) of N,N-dipropyl-urea having a melting point of 69° C. are obtained.
後処理
- temperatureThis is heated to an internal temperature of from 130° to 135° C.
- additionis slowly introduced
- concentrationthe reaction mixture is concentrated to half its volume
- waitIt is then left
- customthe crystallized reaction product
- customis separated by suction filtration
出典と根拠
- ORDレコード
- ord-cd47fa0738ff43f9a525b1e80c5144c5
- 出典データセット
- uspto-grants-1982_01
- 特許番号
- US04310692
反応ノート
読み込み中…