Lithium hydroxide, monohydrate → ((1S)-5-{3-[(1-methyl-1H-indol-5-yl)oxy]propoxy}-2,3-dihydro-1H-inden-1-yl)acetic acid

To a solution of ethyl((1S)-5-{3-[(1-methyl-1H-indol-5-yl)oxy]propoxy}-2,3-dihydro-1H-inden-1-yl)acetate (51 mg, 0.13 mmol) (Example 48) in THF (1.8 mL) was added LiOH.H2O (6 mg, 0.15 mmol) in water (0.6 mL). The mixture was stirred for 12 h at rt, then the reaction mixture was concentrated under reduced pressure and the residue suspended in a small volume of water. The pH was adjusted to below 3 with HCl (1 N aqueous solution), and the aqueous layer was extracted with EtOAc. The organic layer was dried, filtered, and concentrated under reduced pressure to give 44 mg (93%) of the title compound as a solid. 1H NMR (400 MHz, CDCl3): δ 7.10 (d, 1H), 7.05-6.96 (m, 2H), 6.93 (d, 1H), 6.81 (dd, 1H), 6.72 (s, 1H), 6.65 (dd, 1H), 6.32 (d, 1H), 4.18-4.00 (m, 4H), 3.69 (s, 3H), 3.52-3.40 (m, 1H), 2.92-2.65 (m, 3H), 2.42-2.24 (m, 2H), 2.22-2.10 (m, 2H), 1.78-1.62 (m, 1H); LC-MS RT=3.45 min, (M+H)+ 380.1.

1. concentrationthe reaction mixture was concentrated under reduced pressure
2. extractionthe aqueous layer was extracted with EtOAc
3. customThe organic layer was dried
4. filtrationfiltered
5. concentrationconcentrated under reduced pressure

ORD record

ord-aaa586ef386c4a20afd8fb85905c8e7e

Source dataset

uspto-grants-2010_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07714004B2