4-Ethoxycarbonylphenylboronic acid → 4-[1-(2-Chloro-3,6-difluorobenzyl)-2-oxo-1,2,3,4-tetrahydropyrido[2,3-b]pyrazin-7-yl]benzoic acid ethyl ester
Reaction equation
[Cl:1][C:2]1[C:20]([F:21])=[CH:19][CH:18]=[C:17]([F:22])[C:3]=1[CH2:4][N:5]1[C:10](=[O:11])[CH2:9][NH:8][C:7]2[N:12]=[CH:13][C:14](I)=[CH:15][C:6]1=2.[CH2:23]([O:25][C:26]([C:28]1[CH:33]=[CH:32][C:31](B(O)O)=[CH:30][CH:29]=1)=[O:27])[CH3:24]>>[CH2:23]([O:25][C:26](=[O:27])[C:28]1[CH:33]=[CH:32][C:31]([C:14]2[CH:13]=[N:12][C:7]3[NH:8][CH2:9][C:10](=[O:11])[N:5]([CH2:4][C:3]4[C:17]([F:22])=[CH:18][CH:19]=[C:20]([F:21])[C:2]=4[Cl:1])[C:6]=3[CH:15]=2)=[CH:30][CH:29]=1)[CH3:24]Participants
3
Conditions
- Temperature
- 130 °C
Procedure
1-(2-Chloro-3,6-difluorobenzyl)-7-iodo-3,4-dihydro-1H-pyrido[2,3-b]pyrazin-2-one (280 mg) was reacted with 4-ethoxycarbonyl phenyl boronic acid as in General Procedure 4A, with the modification that the mixture was heated to 130° C. in a microwave oven for 5 minutes. The title compound was obtained as a white solid after silica gel chromatography (19% yield). M.p. 180-182° C., LCMS: m/z=458.37 (M+H+), 1H-NMR (DMSO-d6, 400 MHz) δ 1.34 (t, J=7.1 Hz, 3H), 4.08 (s, 2H), 4.33 (q, J=7.1 Hz, 2H), 5.39 (s, 2H), 7.18 (bs, 1H), 7.29-7.33 (m, 1H), 7.39-7.47 (m, 1H), 7.42 (s, 1H), 7.46 (d, J=8.3 Hz, 2H), 7.66 (d, J=8.3 Hz, 2H), 7.97 (s, 1H).
Sources & evidence
- ORD record
- ord-fa11a62cb2bc4398955245cfa6082bb4
- Source dataset
- uspto-grants-2011_12
- Patent number
- US08080561B2
Reaction notes
Loading…