Methylaluminum Bis 2,6-di-/-butyl-4-methylphenoxide

Lutetium(III) isopropoxide, 311 Methylaluminum bis(2,6-di-/-butyl-4-methylphenoxide), 203 Methylaluminum bis(2,4,6-tri-t-butyl-phenoxide), 203... 

Methylaluminum bis(2,6-di-t-butyl-4-methylphenoxide) (MAD, 1) methylal-uminum bis(2,4,6-tri-Ubutylphenoxide) (MAT, 2). The complexes formed from 4-f-butylcyclohexanone and 1 or 2 (3 equiv.) react with methyllithium or CH3MgBr... 

Methoxy(phenylthio)trimethylsilyl-methyllithium, 182 l-Methoxy-3-phenylthio-3-trimethyl-silyl-l-propenyl-3-lithium, 182 1 -Methoxy-4-(trimethylsilyl)-1 -butene-3-ynyl-2-lithium, 180 Methyllithium, 142, 188, 203, 214, 315 Methyllithium-Methylaluminum bis-(2,6-di-t-butyl-4-methylphenoxide), 203... 

To a solution of 2,6-di-/m-butyl-4-methylphenol (13.22 g, 60 mmol) in degassed hexane (40 mL) was added a 2 M hexane solution of Me Al (15 mL, 30 mmol) at room temperature. A white precipitate appeared immediately. After 1 h, this mixture was heated until the precipitate redissolved in hexane. The resulting solution was allowed to stand for 3 h, yielding colorless crystals which were filtered in an argon box. Since the crystals contain some impurities such as 2.6-di-/c/7-butyl-4- methylphenol and inorganic aluminum salts, they were further recrystallized from hexane (45 mL) at -20 °C to give essentially pure methylaluminum bis(2.6-di-/c/7-butyl-4-methylphenoxide) (MAD) (7.83 g, 54% yield). 

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