1,1 -Ferrocenedicarboxylic acid conjugates

Recently, the synthesis of l,l -bis(rert-butoxycarbonylamino)ferrocene 52 was reported, a convenient synthon of 1,1 -diaminoferrocene 30, which circumvents the problems encountered with the explosive diazide. The bis-Boc derivative is compatible with the peptide synthesis protocol, as is demonstrated by the preparation of its first amino acid conjugates. 1,1 -Bis(carbonylazido)ferrocene was synthesized from l,l -ferrocenedicarboxylic acid 7 by... 

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