L-Lysine → (R)-2-(9-chloro-7-(4-isopropoxy-3-(trifluoromethyl)benzyloxy)-2,3-dihydro-1H-pyrrolo[1,2-a]indol-1-yl)acetic acid L-lysine salt

Participants

Reaction Conditions

Reaction Steps

(R)-2-(9-Chloro-7-(4-isopropoxy-3-(trifluoromethyl)benzyloxy)-2,3-dihydro-1H-pyrrolo[1,2-a]indol-1-yl)acetic acid (2.0 g, 4.15 mmol) was dissolved in acetonitrile (66 mL) with heating (70° C., oil bath) and a 2.0 M aqueous L-lysine solution (2.075 mL, 4.15 mmol) was added. After addition, the oil bath was turned off, and the reaction was allowed to slowly cool to room temperature and stirred for 16 h. The white solid was collected by vacuum filtration to afford 2.365 grams of the desired (R)-2-(9-chloro-7-(4-isopropoxy-3-(trifluoromethyl)benzyloxy)-2,3-dihydro-1H-pyrrolo[1,2-a]indol-1-yl)acetic acid L-lysine salt (91% yield).

Provenance & Evidence