Ammonium Chloride → (Z)-4-[5-amino-2,3-dihydro-3-[(3-methoxy-1H-pyrrol-2-yl) methylene]-2-oxo-1H-indol-4-yl]-benzoic acid methyl ester

Beteiligte Stoffe

Reaktionsschritte

Using Method L above, (Z)-4-[2,3-dihydro-3-[(3-methoxy-1H-pyrrol-2-yl) methylene]-5-nitro-2-oxo-1H-indol-4-yl]-benzoic acid methyl ester (85 mg, 0.22 mmol) (from Example 45 supra) was reduced with zinc (130 mg, 1.97 mmol) and ammonium chloride (25.8 mg, 0.48 mmol) in 10% water in methanol (10 mL) at reflux for 2 h to yield (Z)-4-[5-amino-2,3-dihydro-3-[(3-methoxy-1H-pyrrol-2-yl) methylene]-2-oxo-1H-indol-4-yl]-benzoic acid methyl ester (yield: 40 mg, 51%).

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