Synthesis, stereochemical assignment, and bioactivity of the Penicillium metabolites penicillenols B1 and B2
摘要:
The Penicillium metabolites penicillenols B-1 and B-2 were synthesised for the first time by elimination of a mesylated penicillenol A precursor as obtained from an L-threonine derived tetramic acid. The (Z,S)-and (E,S)-configured diastereomers were identical to the natural compounds as to NMR spectra and optical rotations. Both isomers showed antiproliferative effects against cancer and endothelial cell lines and penicillenol B-1 was also notably antibiotic against Staphylococcus aureus. (C) 2015 Elsevier Ltd. All rights reserved.
The present invention relates to a compound of formula (I) or (II), processes for preparing them, peptides including them and kits involving them.
这项发明涉及到式(I)或(II)的化合物,制备它们的方法,包括它们的肽和涉及它们的试剂盒。
A mild removal of Fmoc group using sodium azide
作者:Chun-Chi Chen、Basker Rajagopal、Xuan Yu Liu、Kuan Lin Chen、Yu-Chang Tyan、FuI Lin、Po-Chiao Lin
DOI:10.1007/s00726-013-1625-7
日期:2014.2
Finally, a biologically significant hexapeptide, angiotensin IV, was successfully synthesized by solidphasepeptidesynthesis using the developed sodium azide method for all Fmoc removals. The base-free condition provides a complement method for Fmoc deprotection in peptidechemistry and modern organic synthesis. Graphical Abstract
Two Novel Cyclic Peptides with Antifungal Activity from the Cyanobacterium<i> Tolypothrix byssoidea</i> (EAWAG 195)
作者:B. Jaki、O. Zerbe、J. Heilmann、O. Sticher
DOI:10.1021/np000297e
日期:2001.2.1
Two novel cyclic tridecapeptides, tolybyssidins A (1) and B (2), were isolated from the culture medium of mass cultured cyanobacterium Tolypothrixbyssoidea (EAWAG 195) by means of bioguided isolation. The gross structures of these peptides were determined by 1D and 2D NMR experiments and tandem mass spectrometry. Both peptides contain the nonnatural amino acid dehydrohomoalanine (Dhha) as well as
Biomimetic Glycosylated Polythreonines by <i>N</i>-Carboxyanhydride Polymerization
作者:Anna C. Deleray、Jessica R. Kramer
DOI:10.1021/acs.biomac.2c00020
日期:2022.3.14
provide ready access to probe the contributions of individual amino acids to protein structure in a controlled and tunable manner. N-Carboxyanhydride (NCA) polymerization is one major route to such biomimetic polypeptides. However, challenges in the preparation and polymerization of Thr NCAs have impeded obtaining such structures. Here, we present optimized routes to several glycosylated and acetylated Thr