Synthesis and Peptidyl-Prolyl Isomerase Inhibitory Activity of Quinoxalines as Ligands of Cyclophilin A
作者:Feng Wang、Jing Chen、Xuejun Liu、Xu Shen、Xuchang He、Hualiang Jiang、Donglu Bai
DOI:10.1248/cpb.54.372
日期:——
In search of small molecule compounds as the ligands of cyclophilin A, a series of quinoxalines were prepared, and their Kd values of cyclophilin A and IC50 values for peptidyl-prolyl isomerase activity of cyclophilin A were tested. The results suggest that some quinoxalines are promising ligands of cyclophilin A.
Orthogonal Catalysis for an Enantioselective Domino Inverse‐Electron Demand Diels−Alder/Substitution Reaction
作者:Sebastian Beeck、Sebastian Ahles、Hermann A. Wegner
DOI:10.1002/chem.202104085
日期:2022.1.24
have been accessedthrough a novel enantioselective domino process. Lewis acid activation and organocatalysis were combined to generate the products from readily available substances. A newchiral amine catalyst ensures high enantiomeric ratios. Both enantiomers of the product can be derived and the configuration on the newly generated stereo centers were unambiguously related to the chirality of the
Fromα,β-Unsaturated Fischer Carbene Complexes to Highly Substituted 3-Ethoxycyclopentadienes, Masked Cyclopentenones
作者:Yao-Ting Wu、Bernard Flynn、Heiko Schirmer、Frank Funke、Stefan Müller、Thomas Labahn、Markus Nötzel、Armin de Meijere
DOI:10.1002/ejoc.200300534
日期:2004.2
cyclopentenones 21 could be either eliminated or transformed into other functional groups via the quaternary ammonium salts 24. The elimination product, cyclopentadienone 27 can undergo dimerization either by a formal [4+2] or [2+2] cycloaddition. Cyclopentenone 21naaa with a bromovinyl-terminated side chain undergoes an intramolecular Heck reaction to form 5-methyl-4,6-dimethylenebicyclo[3.3.0]oct-1-en-3-one
New Benzylureas as a Novel Series of Potent, Nonpeptidic Vasopressin V2 Receptor Agonists
作者:Christopher M. Yea、Christine E. Allan、Doreen M. Ashworth、James Barnett、Andy J. Baxter、Janice D. Broadbridge、Richard J. Franklin、Sally L. Hampton、Peter Hudson、John A. Horton、Paul D. Jenkins、Andy M. Penson、Gary R. W. Pitt、Pierre Rivière、Peter A. Robson、David P. Rooker、Graeme Semple、Andy Sheppard、Robert M. Haigh、Michael B. Roe
DOI:10.1021/jm8008162
日期:2008.12.25
proven an effective drug for diseases where a reduction of urine output is desired. However, its peptidic nature limits its bioavailability. We report herein the discovery of potent, nonpeptidic, benzylurea derived agonists of the vasopressin V2 receptor. We describe substitutions on the benzyl group to give improvements in potency and subsequent modifications to the urea end group to provide improvements
Amino Acids and Peptides. XVI. Synthesis of N-Terminal Tetrapeptide Analogy of Fibrin .ALPHA.-Chain and Their Inhibitory Effects on Fibrinogen/Thrombin Clotting.
N-Terminal tetrapeptide analogs of fibrin α-chain were synthesized by the solution method using a new active ester, the ester of the oxime of p-nitroacetophenone, and by the solid-phase method. Their inhibitory effects on fibrinogen/thrombin clotting were examined. Of the synthetic peptides, amide analogs of Gly-Pro-Arg-Pro exhibited a more potent inhibitory effect.