HNO No HOAc Ka~23 p Br2 -Br Fe Br Br2 2 h 芴( Fluorene) Na, Cro 芴酮 ①D HOAc Fluorenone H K ⑨D KOH 芴钾Organic Chemistry Organic Chemistry Xiamen Xiamen University University 1 2 6 5 4 3 7 8 9 HNO 3 HOA c NO 2 Br Br Br 2 Br 2 Fe hv 芴 ( Flu o rene) O Na 2Cr 2 O 7 HOA c H K KOH pKa ~ 23 芴酮 F luorenone 芴钾