Suzuki-Miyaura Diversification of Amino Acids and Dipeptides in Aqueous Media
作者:Tom Willemse、Karolien Van Imp、Rebecca J. M. Goss、Herman W. T. Van Vlijmen、Wim Schepens、Bert U. W. Maes、Steven Ballet
DOI:10.1002/cctc.201500190
日期:2015.7.13
modification of unprotected and Boc‐protected aromatic amino acids and dipeptides in aqueous media, enabling heteroarylation and vinylation. We systematically investigate the impact of the peptide backbone and adjacent amino acid residues upon the reaction. Our studies reveal that although asparagine and histidine hinder the reaction, by utilising dppf, a ferrocene‐based bidentate phosphine ligand, cross coupling
Peptide nucleic acid (PNA) oligomers with linear topology are synthesised with histidines at the central positions in order to provide metal-ion coordination sites within the water shielded and non-polar environment of a nucleobasestack that emerges upon duplex formation. Variation of the linker length used for attachment of the nucleobases to the regular peptide backbone allows for fine tuning of
procedure is developed for the synthesis of α-hydroxy carboxylic acids by treatment of the corresponding protonated α-aminoacid with tert-butyl nitrite in 1,4-dioxane–water. The amino moiety must be protonated and located α to a carboxylic acidfunction in order to undergo initial diazotization and successive hydroxylation, since neither β-amino acids nor acidderivatives such as esters and amides undergo