N,N-Dimethylaniline → 6-(3-allyl-4-hydroxyphenyl)-4,5-dihydro-3(2H)-pyridazinone
Reaction equation
C([O:4][C:5]1[CH:10]=[CH:9][C:8]([C:11]2[CH2:12][CH2:13][C:14](=[O:17])[NH:15][N:16]=2)=[CH:7][CH:6]=1)C=C.CN(C)[C:20]1[CH:25]=CC=C[CH:21]=1>>[CH2:25]([C:10]1[CH:9]=[C:8]([C:11]2[CH2:12][CH2:13][C:14](=[O:17])[NH:15][N:16]=2)[CH:7]=[CH:6][C:5]=1[OH:4])[CH:20]=[CH2:21]Participants
3
Procedure
A mixture of 6-(4-allyloxyphenyl)-4,5-dihydro-3(2H)-pyridazinone (81.8 g, 0.36 mole) and N,N-dimethylaniline (200 ml) was heated under reflux in an atmosphere of nitrogen for 6 hours, then allowed to cool overnight. The collected product was well washed with ether to give 6-(3-allyl-4-hydroxyphenyl)-4,5-dihydro-3(2H)-pyridazinone (71.5 g, 87%, m.p. 240°-244°C). Recrystallisation from 2-methoxyethanol gave the pure material of m.p. 242°-244°C.
Workup
- temperaturewas heated
- temperatureunder reflux in an atmosphere of nitrogen for 6 hours