Phenethylamine, reaction with ketones

Conversely, if the substituted phenylacetic acid or its chloride are not readily accessible, the diazo ketone obtained from the corresponding aromatic acid chloride and diazomethane may be treated directly with the substituted phenethylamine. An Arndt-Eistert type rearrangement occurs which leads directly to the phenethylamide of the respective homo acid. An example for this type of reaction may be found in the synthesis of 1-benzylhydrohydrastinine (61). 

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