반응 #52560

반응 방정식

sulfuric acid

sodium bis(2-methoxyethoxy)aluminum hydride

morpholine

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

→

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

수율 76.9%

용매

toluene

toluene

반응 조건

후처리

1. 1
   기타prepared earlier
2. 2
   온도while maintaining the inner temperature to not higher than 0° C.
3. 3
   workup.ADDITIONafter completion of the addition
4. 4
   온도the mixture was heated to room temperature
5. 5
   온도while maintaining the inner temperature to not higher than 10° C
6. 6
   기타The organic layer was separated from the mixture
7. 7
   추출the aqueous layer was extracted with toluene (30 ml)
8. 8
   기타obtained earlier
9. 9
   세척The mixture was washed with water (100 ml)
10. 10
    건조dried over anhydrous sodium sulfate
11. 11
    농축concentrated
12. 12
    기타The obtained residue was recrystallized from diisopropyl ether

실험 절차

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%).

출처