Carbon Dioxide → (z)-11-(3-(Dimethylamino)propylidene)-6,11-dihydrodibenz[b,e]oxepin-9-carboxylic acid
Reaction equation
Br[C:2]1[CH:3]=[CH:4][C:5]2[CH2:11][O:10][C:9]3[CH:12]=[CH:13][CH:14]=[CH:15][C:8]=3/[C:7](=[CH:16]\[CH2:17][CH2:18][N:19]([CH3:21])[CH3:20])/[C:6]=2[CH:22]=1.O1CCCC1.C([Li])CCC.[C:33](=[O:35])=[O:34]>CCCCCC>[CH3:20][N:19]([CH3:21])[CH2:18][CH2:17]/[CH:16]=[C:7]1\[C:8]2[CH:15]=[CH:14][CH:13]=[CH:12][C:9]=2[O:10][CH2:11][C:5]2[CH:4]=[CH:3][C:2]([C:33]([OH:35])=[O:34])=[CH:22][C:6]\1=2Participants
6
Reactant 4
Product 1
Reagents, catalysts & solvents 1
Procedure
Pure (Z)-3-(9-bromo-6,11-dihydrodibenz[b,e]oxepin-11-ylidene)-N,N-dimethylpropylamine (0.78 g., 2.2 mmole), in cold (-70° C.) dry tetrahydrofuran (50 mL), was treated with 2.4 mmole n-butyl lithium in hexane followed by gaseous carbon dioxide by the procedure of Example I, Step c. This provided the desired carboxylic acid which was recrystallized from water to yield 0.15 g. pure Z-isomer, m.p. >205° C. (decomp.) with melting at 210° C. pmr (CDCl3 /D2O) δ: 7.84 (d, J=1.8 Hz, 1H, H10), 7.81 (dd, J=6.4, 1.8 Hz, 1H, H8), 6.94-7.35 (m, 5H, aromatic), 5.78 (t, J=6.9 Hz, 1H, CH=), 5.25 (s, 2H, CH2O), 3.20 (m, 2H, NCH2), 2.80 (s, 6H, NMe2), 2.50-2.90 (m, 2H, CH2).
Sources & evidence
- ORD record
- ord-eeaf2781be5e43228d052a0fe47720c9
- Source dataset
- uspto-grants-1990_05
- Patent number
- US04923892
Reaction notes
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