反応 #77822

反応方程式

Methyl 4-formylbenzoate

4-cyclohexylaniline

→

4-[(4-cyclohexylphenylimino)methyl]benzoic acid methyl ester

溶媒

methanol

methanol

methanol

反応条件

後処理

1. 1
   ろ過Filtration
2. 2
   洗浄washing
3. 3
   その他drying in vacuo

実験手順

Methyl 4-formylbenzoate (47 g, 285 mmol) was dissolved in methanol (400 ml) and a solution of 4-cyclohexylaniline (50 g, 0.285 mmol) in methanol (200 ml) is slowly added with mechanical stirring. More methanol (1 l) was added and the suspension was stirred at room temperature for 3 days. Filtration, washing and drying in vacuo afforded 90.7 g (99%) of 4-[(4-cyclohexylphenylimino)methyl]benzoic acid methyl ester. This was dissolved in N-methylpyrrolidone (855 ml) and methanol (45 ml). With mechanical stirring sodium borohydride pellets (42.4 g, 1.12 mol) was added in portions keeping the temperature below 40° C. The mixture was then stirred at room temperature for 2 hours and at 40° C. for 16 hours. The mixture was cooled to 5° C. and water (2 I) was slowly added. Then acetone (350 ml) was added and the mixture was stirred at 5° C. for 1 hour. Filtration, washing with water (2×500 ml) and drying in vacuo afforded 78 g (86%) of 4-[(4-cyclohexylphenylamino)-methyl]benzoic acid methyl ester as a solid.

出典