Large scale enantiomeric synthesis, purification, and characterization of ω-unsaturated amino acids via a Gly-Ni(II)-BPB-complex
作者:Xuyuan Gu、John M. Ndungu、Wei Qiu、Jinfa Ying、Michael D. Carducci、Hank Wooden、Victor J. Hruby
DOI:10.1016/j.tet.2004.06.087
日期:2004.9
of ω-unsaturated amino acids and β-substituted ω-unsaturated amino acids were accomplished by using Gly-Ni-2[N-(N′-benzylprolyl)amino]benzophenone (BPB) as a chiral auxiliary. The synthesis provides excellent yields and high diastereoselectivities. The product crystallization followed by isomer epimerization strategy makes the reaction practical and useful for large-scale preparations. Dialkylation of
Identification of Novel Low Molecular Weight CXCR4 Antagonists by Structural Tuning of Cyclic Tetrapeptide Scaffolds
作者:Hirokazu Tamamura、Takanobu Araki、Satoshi Ueda、Zixuan Wang、Shinya Oishi、Ai Esaka、John O. Trent、Hideki Nakashima、Naoki Yamamoto、Stephen C. Peiper、Akira Otaka、Nobutaka Fujii
DOI:10.1021/jm050009h
日期:2005.5.1
found by using two orthogonal cyclic pentapeptide libraries involving conformation-based and sequence-based libraries based on the pharmacophore of a 14-mer peptidic antagonist, 1. Herein, cyclic tetrapeptides derived from replacements of the dipeptide unit (Nal-Gly) with a gamma-amino acid and pseudopeptides cyclized by disulfide and olefin bridges were synthesized to find novel scaffold structures different
[EN] MODULATORS OF CYSTIC FIBROSIS TRANSMEMBRANE CONDUCTANCE REGULATOR<br/>[FR] MODULATEURS DU RÉGULATEUR DE LA CONDUCTANCE TRANSMEMBRANAIRE DE LA FIBROSE KYSTIQUE
申请人:VERTEX PHARMA
公开号:WO2022076622A3
公开(公告)日:2022-07-21
This disclosure provides modulators of Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) having core structure (I), pharmaceutical compositions containing at least one such modulator, methods of treatment of CFTR mediated diseases, including cystic fibrosis, using such modulators and pharmaceutical compositions, combination pharmaceutical compositions and combination therapies employing those modulators, and processes and intermediates for making such modulators.
Practical method for the synthesis of D- or L-.alpha.-amino acids by the alkylation of (+)- or (-)-pseudoephedrine glycinamide.
作者:Andrew G. Myers、James L. Gleason、Taeyoung Yoon
DOI:10.1021/ja00137a034
日期:1995.8
A novel strategy toward [6,5]-bicyclic β-turn dipeptide
作者:Xuyuan Gu、Xuejun Tang、Scott Cowell、Jinfa Ying、Victor J. Hruby
DOI:10.1016/s0040-4039(02)01338-2
日期:2002.9
A novel strategy toward the syntheses of [6,5]-bicyclic beta-turn dipeptides has been developed starting from delta,epsilon-unsaturated amino acids. This is the first example showing that this scaffold can be synthesized front a terminal alkene using a trifluoroacetyl protected amino acid. Both enantiomers of the delta,epsilon-unsaturated amino acid were synthesized by a modified method using Ni(II)-complexes. (C) 2002 Elsevier Science Ltd. All rights reserved.