反应详情

As in Example 115, (E)-5,5-bis(3-nitrophenyl)-2,4-pentadienoic acid (0.78 g) and 4-nitrophenol (0.35 g) in dichloromethane (10 mL) was treated with 1,3-dicyclohexylcarbodiimide (0.47 g). The mixture was stirred at 0°-5° C. for 1 hour, then at room temperature for 1 hour. The usual work up furnished 1.01 g of crude (E)-5,5-bis(3-nitrophenyl)-2,4-pentadienoic acid 4-nitrophenyl ester. This intermediate was used without further purification.

1. waitat room temperature for 1 hour