Patent ID: 8309747
Filing Date: 2012-11-13
Classification: C07F

Abstract:
1. A method of making a metallocene compound having the formula: the method comprising: (i) contacting a first compound having the formula: or a combination thereof, with a first strong base in the presence of a first solvent to form a first mixture; (ii) contacting the first mixture with a second compound having the formula: in the presence of a second solvent to form a crude ligand product comprising a third compound having the formula: or a combination thereof; (iii) contacting the crude ligand product with a second strong base in the presence of a third solvent to form an intermediate mixture comprising a dianion of the third compound; and (iv) contacting the intermediate mixture with M wherein: the method does not comprise a fine purification step comprising distillation, chromatography, crystallization, or a combination thereof; M X L Cp is a cyclopentadienyl group; E R R