反応 #52560

反応方程式

sulfuric acid

sodium bis(2-methoxyethoxy)aluminum hydride

morpholine

Methyl 4-(4′-fluorophenyl)-2-cyclopropylquinoline-3-carboxylate

→

4-(4′-fluorophenyl)-2-cyclopropylquinoline-3-carbaldehyde

収率 76.9%

溶媒

toluene

toluene

反応条件

後処理

1. 1
   その他prepared earlier
2. 2
   温度while maintaining the inner temperature to not higher than 0° C.
3. 3
   workup.ADDITIONafter completion of the addition
4. 4
   温度the mixture was heated to room temperature
5. 5
   温度while maintaining the inner temperature to not higher than 10° C
6. 6
   その他The organic layer was separated from the mixture
7. 7
   抽出the aqueous layer was extracted with toluene (30 ml)
8. 8
   その他obtained earlier
9. 9
   洗浄The mixture was washed with water (100 ml)
10. 10
    乾燥dried over anhydrous sodium sulfate
11. 11
    濃縮concentrated
12. 12
    その他The obtained residue was recrystallized from diisopropyl ether

実験手順

Methyl 4-(4′-fluorophenyl)-2-cyclopropylquinoline-3-carboxylate (32.1 g, 100 mmol) and toluene (300 ml) were placed in a different 1000 ml three-necked flask, and the system was replaced by nitrogen and cooled to −5° C. To this solution was added dropwise the entire amount of a toluene solution prepared earlier by mixing sodium bis(2-methoxyethoxy)aluminum hydride and morpholine, while maintaining the inner temperature to not higher than 0° C., and after completion of the addition, the mixture was heated to room temperature and stirred for 3 hr. This reaction mixture was added dropwise to a 15% aqueous sulfuric acid solution (200 ml) while maintaining the inner temperature to not higher than 10° C. The organic layer was separated from the mixture and the aqueous layer was extracted with toluene (30 ml). The extract was combined with the organic layer obtained earlier. The mixture was washed with water (100 ml), dried over anhydrous sodium sulfate and concentrated. The obtained residue was recrystallized from diisopropyl ether to give 4-(4′-fluorophenyl)-2-cyclopropylquinoline-3-carbaldehyde (22.4 g, yield 76%).

出典