Abstract

A tricyclic precursor for the synthesis of the prodrugs of pro-1,2,9,9a-tetrahydrocyclopropa[ c]benz-[ e]indole-4-one tetramethoxyindolecarboxamide (CBI-TMI) was prepared using the ring-closing metathesis approach. The tricyclic intermediate was converted to an advanced precursor of a CBI-TMI prodrug equipped with a linker presumably suitable for activation using the aldolase catalytic antibody 38C2. An attempted 38C2-catalyzed two-step activation of the hydroxy- pro-CBI intermediate involving retro-aldol and the β-elimination reactions was also examined.

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