N,N-Dimethylacrylamide → (E)-4-Ethoxy-3-(1-methyl-7-oxo-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-5-yl)cinnamic acid dimethylamide
Reaction equation
[CH3:1][N:2]([CH3:7])[C:3](=[O:6])[CH:4]=[CH2:5].Br[C:9]1[CH:10]=[CH:11][C:12]([O:29][CH2:30][CH3:31])=[C:13]([C:15]2[NH:16][C:17](=[O:28])[C:18]3[N:23]([CH3:24])[N:22]=[C:21]([CH2:25][CH2:26][CH3:27])[C:19]=3[N:20]=2)[CH:14]=1>>[CH3:1][N:2]([CH3:7])[C:3](=[O:6])/[CH:4]=[CH:5]/[C:9]1[CH:10]=[CH:11][C:12]([O:29][CH2:30][CH3:31])=[C:13]([C:15]2[NH:16][C:17](=[O:28])[C:18]3[N:23]([CH3:24])[N:22]=[C:21]([CH2:25][CH2:26][CH3:27])[C:19]=3[N:20]=2)[CH:14]=1Participants
3
Procedure
The title compound was prepared from N,N-dimethylacrylamide and 5-(5-bromo-2-ethoxyphenyl)-1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one following the procedure of Example 19 and was obtained, following crystallisation from ethyl acetate-hexane, as colourless crystals (38%), m.p. 219°-221° C. Found: C,64.15; H,6.46; N,16.96. C22H27N5O3 requires C,64.53; H,6.65; N,17.10%.