4-Formylbenzoic acid → HCID 9932323, compound

Participants

Reaction Steps

Using Method D above, 4-(1-hydroxy-2-propynyl)-benzoic acid methyl ester (137 mg, 0.72 mmol) (prepared by the addition of ethynylmagnesium chloride (Aldrich) to 4-carboxybenzaldehyde (Aldrich) using Method B above to give the acid which was converted to its methyl ester by Method E above), was coupled to (Z)-4-bromo-1,3-dihydro-3-[(3-methoxy-1H-pyrrol-2-yl)methylene]-2H-indol-2-one (Starting Material 1) (221 mg, 0.69 mmol) using (Ph3P)2PdCl2 (37 mg) (Aldrich) and CuI (18 mg) (Aldrich) as catalyst in DMF (4 mL) and Et3N (4 mL) as solvent at 70° C. for 18 h, yielding rac-(Z)-4-[3-[2,3-dihydro-3-[(3-methoxy-1H-pyrrol-2-yl)methylene]-2-oxo-1H-indol-4-yl]-1-hydroxy-2-propynyl]benzoic acid methyl ester. (Yield 52 mg, 18%).

Provenance & Evidence