Hydrochloric Acid → 2-(7-(3,4-Diethoxybenzyloxy)-2,3-dihydro-1H-pyrrolo[1,2-a]indol-1-yl)acetic Acid

温度

70 °C

tert-Butyl 2-(7-(3,4-diethoxybenzyloxy)-2,3-dihydro-1H-pyrrolo[1,2-a]indol-1-yl)acetate (173.1 mg) was taken up in dioxane (4 mL) and 1.0 M aqueous LiOH (1.11 mL) was added. The reaction was stirred at 70° C. 16 h, and stirred at 80° C. for an additional 5 h. The mixture was cooled to room temperature and poured into a separatory funnel containing EtOAc and 1.0 M HCl. The water layer was removed and the EtOAc layer was washed with water. The organics were dried over sodium sulfate, filtered, and concentrated under reduced pressure to give title compound (131.4 mg). LCMS m/z=410.4 [M+H]+; 1H NMR (400 MHz, CDCl3) δ ppm 1.28-1.34 (m, 6H), 2.15-2.26 (m, 1H), 2.54 (dd, J=16.3, 7.9 Hz, 1H), 2.68 (dd, J=16.3, 6.7 Hz, 1H), 2.72-2.82 (m, 1H), 3.53-3.62 (m, 1H), 3.91-4.93 (m, 6H), 4.95 (s, 2H), 6.0 (s, 1H), 6.73 (dd, J=8.7, 2.4 Hz, 1H), 6.90-6.96 (m, 2H), 7.02-7.06 (m, 2H), 7.17 (d, J=9.0 Hz, 1H), 12.3 (bs, 1H).

1. stirring16 h, and stirred at 80° C. for an additional 5 h
2. temperatureThe mixture was cooled to room temperature
3. additionpoured into a separatory funnel
4. customThe water layer was removed
5. washthe EtOAc layer was washed with water
6. dry with materialThe organics were dried over sodium sulfate
7. filtrationfiltered
8. concentrationconcentrated under reduced pressure

ORDレコード

ord-9b3a362e3a0c4f6fb90d22236eecf88a

出典データセット

uspto-grants-2013_04

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08415484B2