Professional suggestion: be sure you keep the relative orientation with the groups to the alkene the identical when drawing the item: On the other hand, halogens will not be electrophillic sufficient to break the aromaticity of benzenes, which need a catalyst to activate. α-Halogenated boronic esters are multipurpose developing blocks. https://kylerwljxj.izrablog.com/38094651/details-fiction-and-bromazolam-liquid-solution