Hydrochloric Acid → (E)-3-(4-{(S)-1-[2-(3,5-dimethyl-1H-pyrazol-4-yl)-ethyl]-pyrrolidin-2-yl}-phenyl)-acrylic acid methyl ester

Participants

Reaction Steps

To a solution of (E)-3-[4-((S)-1-{2-[3,5-dimethyl-1-(toluene-4-sulfonyl)-1H-pyrazol-4-yl]-ethyl}-pyrrolidin-2-yl)-phenyl]-acrylic acid methyl ester (200 mg, 0.394 mmol) in methanol (10 mL) was added sodium methoxide in methanol (25 wt %, 1.0 mL). The mixture was subjected to microwave irradiation for 10 minutes, neutralized with 1 N HCl, and concentrated in vacuo. The remaining aqueous layer was extracted with ethyl acetate and dichloromethane, and the organic extracts were combined, dried over magnesium sulfate and concentrated in vacuo to give (E)-3-(4-{(S)-1-[2-(3,5-dimethyl-1H-pyrazol-4-yl)-ethyl]-pyrrolidin-2-yl}-phenyl)-acrylic acid methyl ester as a yellow crude oil (126 mg) that was directly used in the next step.

Provenance & Evidence