| Abstract
| - Ferrocenyl carboxylic acid derivatives were metalated with TMPMgCl·LiCl, leading after reaction with electrophiles to 1,2-disubstituted ferrocenes. Further metalation of these disubstituted ferrocenes with TMPMgCl·LiCl afforded trisubstituted ferrocenes. A 1,2,3,4-tetrasubstituted ferrocene derivative could also be prepared in this way.
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