Me- Mgl nC5H11 nC5H11 Me-MgI MGl Mgl -2 NH3 +NHaCl-2 MgIC OH 6-bl Fluoren-9-carbaldehyd aus fluoren CHO NaH, HCO,EtO nC5H11 O Me MgI O nC5H11 O Me MgI O O nC5H11 Me MgI MgI O O MgI nC5H11 MgI OH HO nC5H11 +NH4Cl -2 NH3 , -2 MgICl 6-B1 Fluoren-9-carbaldehyd aus Fluoren CHO NaH, HCO2Et 6-B1