4-(2-(2-(2-(2-(5-Cyano-2-(2-methoxyethoxy)-4-nitrophenoxy)ethoxy)ethoxy)ethoxy)ethoxy)-5-(2-methoxyethoxy)-2-nitrobenzonitrile → 2-Amino-5-(2-(2-(2-(2-(5-amino-4-cyano-2-(2-methoxyethoxy)phenoxy)ethoxy)ethoxy)ethoxy)ethoxy)-4-(2-methoxyethoxy)benzonitrile

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Reaction Steps

To a solution of 4-(2-(2-(2-(2-(5-cyano-2-(2-methoxyethoxy)-4-nitrophenoxy)ethoxy)ethoxy)ethoxy)ethoxy)-5-(2-methoxyethoxy)-2-nitrobenzonitrile (0.2 g) in AcOH (10 mL) and i-PrOH (10 mL) was added iron powder (0.5 g). The resulting mixture was heated to reflux for 1 h. After reaction finished, the mixture was cooled to room temperature, filtered, the precipitate washed with EA (10 mL). The combined washings and filtrate were concentrated under reduced pressure and purification by silica chromatography to give 0.18 g of 2-amino-5-(2-(2-(2-(2-(5-amino-4-cyano-2-(2-methoxyethoxy)phenoxy)ethoxy)ethoxy)ethoxy)ethoxy)-4-(2-methoxyethoxy)benzonitrile. 1H-NMR (400 MHz, CDCl3): δ: 6.91 (s, 1H), 6.88 (s, 1H), 6.34 (s, 1H), 6.25 (s, 1H), 4.30 (br, 2H), 4.22-4.05 (m, 10H), 3.88-3.65 (m, 16H), 3.43 (s, 6H).

Provenance & Evidence