Nine 1,3-dichlorobenzene congeners were selected as model compds. to assess the relative rates of proton abstraction from 4- and 5-positions ("ortho" vs. "meta" metalation). Using lithium 2,2,6,6-tetramethylpiperidide as the basic reagent, the chlorine-adj ...
Organofluorine compds. do not grow on trees. They have to be prepd. by introducing the halogen into the carbon backbone at a suitable stage of the synthesis sequence. From a logistic point of view, the key question is, when exactly. For example, if one dea ...