Hydrochloric Acid → 2-[1-(2,1,3-Benzoxadiazol-5-ylmethyl)-6-methyl-7-oxo-4-(p-tolyl)pyrrolo[2,3-c]pyridin-5-yl]-2-tert-butoxy-acetic acid

Participants

Reaction Conditions

Reaction Steps

A mixture of the crude methyl 2-(1-(benzo[c][1,2,5]oxadiazol-5-ylmethyl)-6-methyl-7-oxo-4-(p-tolyl)-6,7-dihydro-1H-pyrrolo[2,3-c]pyridin-5-yl)-2-(tert-butoxy)acetate in Tetrahydrofuran (THF) (1 mL) and Methanol (1 mL) was treated with 2M LiOH (1 mL, 2.000 mmol) and then heated to 70° C. for one hour. The mixture was cooled to 0° C., adjusted to pH <2 with 1N HCl and then extracted with ethyl acetate. The combined extracts were washed with brine, dried over sodium sulfate, filtered and concentrated. The residue was purified by reverse phase chromatography (10-90% MeCN/H2O-0.1% TFA, 12 min.) to give the title compound. 1H NMR (400 MHz, CHLOROFORM-d) ppm 7.77-7.85 (m, 1H) 7.52-7.59 (m, 1H) 7.41-7.49 (m, 2H) 7.36-7.41 (m, 1H) 7.29-7.34 (m, 2H) 7.05-7.13 (m, 1H) 6.09-6.19 (m, 1H) 5.87-6.02 (m, 2H) 5.46-5.52 (m, 1H) 3.66 (s, 3H) 2.45 (s, 3H) 1.00 (s, 9H); LCMS (m/z) ES+=501 (M+1).

Provenance & Evidence