Hydrochloric Acid → (E)-3-(4-{3-[(Cyclopropyl-methyl-amino)-methyl]-phenylethynyl}-phenyl)-acrylic acid

A solution of (E)-3-(4-{3-[(cyclopropyl-methyl-amino)-methyl]-phenylethynyl}-phenyl)-acrylic acid methyl ester (Intermediate 92, 0.11 g, 0.32 mmol) in methanol (3 mL) and tetrahydrofuran (2 mL) was treated with a 3M solution of potassium hydroxide (1 mL, 3 mmol) and the resulting reaction mixture was stirred at ambient temperature for 2 days. The reaction mixture was neutralized with 5% aqueous hydrochloric acid and extracted with ethyl acetate. The organic phase was washed with water and brine, and dried over anhydrous sodium sulfate, filtered and evaporated in vacuo to a residue that was subjected to flash column chromatography over silica gel (230–400 mesh) using 10% methanol in ethyl acetate as the eluent to afford the title product as a yellow solid (0.038 g, 36%).

1. customthe resulting reaction mixture
2. extractionextracted with ethyl acetate
3. washThe organic phase was washed with water and brine
4. dry with materialdried over anhydrous sodium sulfate
5. filtrationfiltered
6. customevaporated in vacuo to a residue that

ORD-Eintrag

ord-11089cf59c7e4460b73171c2bddf9f41

Quelldatensatz

uspto-grants-2007_06

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07226951B2