Solid-phase synthesis of fused 1,4-diazepanone peptidomimetics via tandem N-iminium ion cyclization–nucleophilic addition
2015
Ventosa-Andrés, Pilar | Barea Ripoll, Carlos Alfonso | La-Venia, Agustina | Krchnák, Viktor
We herein describe the solid-phase synthesis of protected N-oxoalkyl-derivatized peptides designed for subsequent acid-mediated, tandem N-acyliminium ion cyclization–nucleophilic addition reaction. The target compounds contained fused 1,4-diazepanones incorporated into a peptide backbone and served as conformational constraints. The scope and limitation of the ring formation were studied, and the structural requirements and reaction conditions for cyclization are outlined.
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