3-[1-(4-Methoxy benzenesulfonyl)-5-methoxy-1H-indol-3-yl]-acrylic acid → Indeglitazar
Reaction equation
[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([S:9]([N:12]2[C:20]3[C:15](=[CH:16][C:17]([O:21][CH3:22])=[CH:18][CH:19]=3)[C:14]([CH:23]=[CH:24][C:25]([OH:27])=[O:26])=[CH:13]2)(=[O:11])=[O:10])=[CH:5][CH:4]=1>C1COCC1.[Pd]>[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([S:9]([N:12]2[C:20]3[C:15](=[CH:16][C:17]([O:21][CH3:22])=[CH:18][CH:19]=3)[C:14]([CH2:23][CH2:24][C:25]([OH:27])=[O:26])=[CH:13]2)(=[O:10])=[O:11])=[CH:5][CH:4]=1Participants
4
Reactant 1
Product 1
Reagents, catalysts & solvents 2
Procedure
To a solution of 3-[1-(4-Methoxy benzenesulfonyl)-5-methoxy-1H-indol-3-yl]-acrylic acid 118 (1.0 g, 2.6 mmol) dissolved in THF (14 mL), Pd/C (67 mg) was added in one portion. The solution was attached to the Parr hydrogenator. The reaction was allowed to proceed overnight at 20-22 psi. The solution was filtered over celite, and the palladium-celite pad was washed with ethyl acetate (40 mL), and methanol (20 mL). The combined washes/solution was evaporated under reduced pressure to afford straw colored oil that solidified after cooling under high vacuum. The crude was triturated with diethyl ether to leave behind off white solid as product 1. (0.620 g, 62%) 1H NMR (DMSO) δ 7.86 (d, J=9.2 Hz, 1H), 7.75 (d, J=8.4 Hz, 1H), 6.92 (dd, J=2.4 Hz, 9.2 Hz, 1H), 6.88 (s, 1H), 6.83 (d, J=9.2 Hz, 2H), 3.76 (s, 3H), 2.96 (t, J=7.6 Hz, 14.8 Hz, 2H), 2.74 (t, J=7.6 Hz, 14.8 Hz, 2H) (M−1=388.6).