Trimethylacetylacetonitrile is a useful intermediate. 4,4-Dimethyl-3-oxopentanenitrile has been used in the preparation of 4,4-dimethyl-3-oxo-2-benzylpentanenitrile, 4,4-dimethyl-3-oxo-2-(4-hydroxybenzyl)pentanenitrile, 4,4-dimethyl-3-oxo-2-(4-methoxybenzyl)pentanenitrile, 4,4-dimethyl-3-oxo-2-(4-fluorobenzyl)pentanenitrile, 4,4-dimethyl-3-oxo-2-(3,4-methylenedioxybenzyl)pentanenitrile, 1-(5-tert-butyl-2-p-tolyl-2H-pyrazol-3-yl)-3-phenylurea.
