Synthesis of Nitrone Analogues of Rar α Selective Retinoid AM580

Synthesis of nitrone analogues of RAR α-selective retinoid Am 580 in which the amide linker is replaced with a nitrone moiety is discribed. The nitrone segment was constructed by oxidizing the corresponding amine using MCPBA or dimethyldioxirane. The resulting nitrone derivatives were found unstable in acidic and basic conditions. The stability limitations of using this nitrone moiety as an amide surrogate are briefed.