Diazoketones from Salicyl and Cinnamoyl Chlorides

1-Diazo-4-phenyl-3-butenone and 1-diazo-1-methyl-4-phenyl-3-butenone have been prepared from cinnamoyl chloride (1 mol.) and diazomethane (2.5 mols.) and diazoethane (2.5 mols.) respectively. Salicyl chloride (1 mol.) with diazomethane [2.5 mols. and 4 mols. (excess)] gives a mixture of \(\omega\)-diazo-o-hydroxy. acetophenone and \(\omega\)-diazo-o-methoxyacetophenone. All these diazoketones have been identified