Summary The dehydrobromination of steroidal bromo ketones with dinitrophenylhydrazine, first discovered by Mattox and Kendall" in the case of 4-bromo-3-ketosteroids, has been examined critically. In addition to the 4-bromo ketones, the method is applicable to the dehydrobromination of 2-bromo-and 2, 2-dibromo-3-ketoallosteroids as well as 2-bromo- and 6-bromod4-3-ketosteroids. The last two compounds both yield the hydrazone of the ...
