[C:1]([O:7]CC)(=O)[CH2:2][C:3]([CH3:5])=[O:4].[CH2:10]([NH:12][CH2:13][CH3:14])[CH3:11]>>[CH2:10]([N:12]([CH2:13][CH3:14])[C:1](=[O:7])[CH2:2][C:3](=[O:4])[CH3:5])[CH3:11]40 g (0.31 mol) of ethyl acetoacetate and 24 g (0.33 mol) of diethylamine were stirred in a Parr apparatus at 150° C. for 10'. The crude mixture was distilled at 115°-120° C./9 mmHg, to give 32 g of the title compound.
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