hydrogen; (1,2,3,4,5-pentamethylcyclopentadiene)*2Y(Me)(thf) in benzene P=760 Torr; 1 h; Ambient temperature;

1: anhydrous sodium iodide / acetone / 2 h / Heating 2: 1.) tert-butyllithium, N,N,N',N'-tetramethylethylenediamine 2.) methanol / 1.) pentane, diethyl ether, -80 deg C, stirred 5 min 2.) room temp. 4 h View Scheme

tert.-butyl lithium in diethyl ether; pentane T=-78°C; 0.0833333 h;

methanol; N,N,N',N,-tetramethylethylenediamine; tert.-butyl lithium 1.) pentane, diethyl ether, -80 deg C, stirred 5 min 2.) room temp. 4 h; Yield given. Multistep reaction;

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