[figure: see text] Mesityllithium was found to be an excellent selective lithiating agent to prepare aryllithium compounds having alkoxycarbonyl groups. To extend our studies on chemoselective lithiation, an important precursor for the synthesis of camptothecin was prepared using a halogen-lithium exchange reaction followed by an intramolecular 1,2-addition.
No takes yet. Share an insight, caveat, or question.
Kondo et al. (2000) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: