can someone teach me how to make this CAS: 52190-28-0 or 1-(benzo[d][1,3]dioxol-5-yl)-2-bromopropan-1-one
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Wiki got ya. 
3,4-Methylenedioxyphenylpropan-2-one[1] or piperonyl methyl ketone (MDP2P or PMK) is a chemical compound consisting of a phenylacetone moiety substituted with a methylenedioxy functional group. It is commonly synthesized from either safrole (which, for comparison, is 3-[3,4-(methylenedioxy)phenyl]-2-propene) or its isomer isosafrole via oxidation using the Wacker oxidation or peroxyacid oxidation methods. MDP2P is unstable at room temperature and must be kept in the freezer in order to be preserved properly.
3,4-Methylenedioxyphenylpropan-2-one[1] or piperonyl methyl ketone (MDP2P or PMK) is a chemical compound consisting of a phenylacetone moiety substituted with a methylenedioxy functional group. It is commonly synthesized from either safrole (which, for comparison, is 3-[3,4-(methylenedioxy)phenyl]-2-propene) or its isomer isosafrole via oxidation using the Wacker oxidation or peroxyacid oxidation methods. MDP2P is unstable at room temperature and must be kept in the freezer in order to be preserved properly.
I don't know if you caught my drift, but what I'm saying is that's a common precursor that you used an uncommon name for. If you type "Rhodium archives at Erowid.org" in your browser, there's several recipes. I think there's even a video tutorial in the video section of this site.