Radical‐Mediated Acyl Thiol‐Ene Reaction for Rapid Synthesis of Biomolecular Thioester Derivatives
作者:Joshua T. McLean、Pierre Milbeo、Dylan M. Lynch、Lauren McSweeney、Eoin M. Scanlan
DOI:10.1002/ejoc.202100615
日期:2021.8.6
Radical-mediated acyl thiol-ene reactions between biologically relevant alkene and thioacid components enables rapid, chemoselective and high yielding thioester formation. This reaction in combination with substrates that enable intramolecular acyl transfer permits access to native and modified products beyond the thioether linkage.
Structure-taste Relationships of Aspartyl Tripeptide Esters
作者:Yasuo Ariyoshi
DOI:10.1246/bcsj.57.3197
日期:1984.11
A series of twenty four analogues of L-α–Asp–Gly–Gly–OMe has been synthesized in relation to structural features of sweet peptides. The rule in the structure-tasterelationships of dipeptides is held in the sweet aspartyl tripeptide esters. In order for the aspartyl tripeptide esters to be sweet, the second amino acid must have a D-configuration and a small, compact alkyl group (Me, Et, or i-Pr) at
已经合成了与甜肽的结构特征相关的一系列 24 种 L-α-Asp-Gly-Gly-OMe 类似物。二肽的结构-味道关系的规则在于甜天冬氨酰三肽酯。为了使天冬氨酰三肽酯具有甜味,第二个氨基酸必须具有 D 构型,并且在 R2 处有一个小的、紧凑的烷基(Me、Et 或 i-Pr)。强烈的甜味需要第三个氨基酸的 L 构型。已经得出结论,R2 处的小烷基通过疏水相互作用参与与受体的结合并增加甜味效力。
“Backdoor Induction” of Chirality in Asymmetric Hydrogenation with Rhodium(I) Complexes of Amino Acid Substituted Triphenylphosphane Ligands
作者:Zoran Kokan、Srećko I. Kirin
DOI:10.1002/ejoc.201301011
日期:2013.12
one pot two step procedure for the synthesis of conjugates 5a-g bearing two different substituents is reported. The 28 prepared phosphanes 1-5 are used as monodentateligands in the rhodium(I) catalyzed hydrogenation of 2-acetamidoacrylate or (Z)-(alpha)-acetamidocinnamate. Ligand with small side chain substituents Lig-[Ala-OMe]2 1a revealed highest selectivity with up to 84 % ee. The catalysts presented
A new method for peptide synthesis in the N→C direction: amide assembly through silver-promoted reaction of thioamides
作者:Aysa Pourvali、James R. Cochrane、Craig A. Hutton
DOI:10.1039/c4cc07601j
日期:——
The Ag(I)-promoted coupling of amino acids and peptides with amino ester thioamides generates peptide imides without epimerisation. The peptide imides undergo regioselective hydrolysis under mild conditions to generate native peptides. This method was employed to prepare the pentapeptide thymopentin in the N-->C direction, in high yield and purity.
Chemo- and Site-Selective Replacement of N-Terminal Carbamates in Peptides
作者:Miho Ibara、Takumi Abe、Daisuke Sawada
DOI:10.1021/acs.orglett.2c00370
日期:2022.3.25
synthesis, it is important to distinguish the terminal aminogroup and carry out the selective transformation of only the N-terminal protectinggroup. We describe herein a reaction for the chemo- and site-selective replacement of carbamates with various other carbamates only at the N-terminus of peptides. We demonstrate the scope of carbamates and peptides and the introduction of fluorine into a peptide