Hello,
I need your help with two mechanism
The first one is reduction:
http://imageshack.us/photo/my-images/694/78729026.jpg/The procedure is:
A mixture of 2,6-dibromo-9,10-diphenyl-9,10-dihydroanthracene-9,10-diol (13.5 g, 15.20 mmol), KI (21.8 g, 131.48 mmol), Na2H2PO2.H2O (15.4g, 175.4 mmol) and acetic acid (152 mL) was heated at reflux for 40 min. The precipitate was collected and dissolved in dichloromethane (DCM). The organic solution was washed with brine, dried over anhydrous MgSO4.
The second one is reduction of nitro to amine:
http://imageshack.us/photo/my-images/72/50398641.jpg/The procedure is:
To a stirred suspension of 2,6-dinitroanthracene-9,10-dione (9.4 g, 31.5 mmol) in ethanol (340 mL) was added a solution of sodium sulfide nonahydrate (34.1 g, 142 mmol) and sodium hydroxide (13.5 g, 338 mmol) in water (590 mL). The mixture was heated at reflux for 6 h and left to stand overnight. The ethanol was removed in vacuo and the residue cooled to 0-5 °C. The resulting precipitate was collected by filtration, repeatedly washed with water, and dried. Recrystallization from ethanol/ water afforded the product as an orange/red solid (7.35 g, 98%)
I appreciate your help.