Fluoro‐olefin in place of a peptide: Dipeptides analogues containing a fluoro‐olefin moiety in place of the peptide bond have been synthesized and introduced into the bioactive C‐terminal heptapeptide of the neuropeptide26RFa by SPPS. The fluoro‐olefin moiety is an effective mimic of the peptide bond that enhances peptide stability, has little impact on its conformation and slightly better bioactivity
Grignard and organolithium reagents efficiently react with (S)-N-(tert-butanesulfinyl)-α-fluoroenimines to provide chiral allylamines in excellent yields and with diastereomeric ratios of up to 96:4. Acidic removal of the sulfinyl group and simple functional group transformations allow to get enantiopure fluoroolefin dipeptide mimics.