Synthesis of N-protected N-methyl serine and threonine
摘要:
Two efficient and convenient synthesis of N-Cbz and N-Fmoc N-methyl serine and threonine an described. The amino acid side-chain alcohol can be protected as a TBDMS ether in very good yield or left free, followed by the formation and subsequent reduction of the corresponding oxazolidinone. (C) 2001 Published by Elsevier Science Ltd.
作者:K. Philip Wojtas、Matthias Riedrich、Jin-Yong Lu、Philipp Winter、Thomas Winkler、Sophia Walter、Hans-Dieter Arndt
DOI:10.1002/anie.201603140
日期:2016.8.8
Totalsynthesis of the bismacrocyclic thiopeptide antibiotic nosiheptide was achieved through the assembly of a fully functionalized linear precursor followed by consecutive macrocyclizations. Key features are a critical macrothiolactonization and a mild deprotection strategy for the 3‐hydroxypyridine core. The natural product was identical to isolated authentic material in terms of spectral data and
General Fmoc-Based Solid-Phase Synthesis of Complex Depsipeptides Circumventing Problematic Fmoc Removal
作者:Ariadna Lobo-Ruiz、Judit Tulla-Puche
DOI:10.1002/ejoc.201901459
日期:2020.1.16
Fmoc‐basedsolid‐phase syntheses of depsipeptides are often hampered by side‐reactions arising from the Fmoc removal step. This study explores the best conditions to circumvent such drawbacks and the findings are used to prepare a highly complex linear depsipeptide exclusively on solidphase. This approach opens the door to a general fully Fmoc‐based strategy for the synthesis of complex depsipeptides
C (1) is an antimicrobial compound produced by Streptomyces sp. KUSC_F05 and consists of a cyclic depsipeptide core and a polyketide side chain with branched methyl groups. Here, we report the total synthesis of tumescenamide C and two derivatives, mainly using Fmoc solid-phase peptidesynthesis (SPPS). In addition, a biological evaluation of these compounds revealed the critical partial structure
Selection of DNA‐Encoded Dynamic Chemical Libraries for Direct Inhibitor Discovery
作者:Yuqing Deng、Jianzhao Peng、Feng Xiong、Yinan Song、Yu Zhou、Jianfu Zhang、Fong Sang Lam、Chao Xie、Wenyin Shen、Yiran Huang、Ling Meng、Xiaoyu Li
DOI:10.1002/anie.202005070
日期:2020.8.24
that can identify full ligand structures from large‐scale DEDLs. This method is also able to convert unbiased libraries into focused ones targeting specific protein classes. We demonstrated this method by selecting DEDLs against five proteins, and novel inhibitors were identified for all targets. Notably, several selective BD1/BD2 inhibitors were identified from the selections against bromodomain 4 (BRD4)
alkyne-azide cycloaddition have enabled selective bioconjugations under mild conditions, yet naturallyoccurring linkages between native functional groups would be more straightforward to elaborate bioconjugates. Herein, we describe the use of a phosphodiester bond as a versatile option to access various bioconjugates. An opposite activation strategy, involving 5'-phosphitylation of the supported oligonucleotides