bonds has been accomplished through radical translocation and cross-coupling. Upon irradiation with visible light, copper-based photocatalyst [Cu(Xantphos)(dmp)]BF4 enabled cross-coupling of N-alkoxyphthalimides with amino acid esters or amino acids to provide δ-C(sp3)–H alkylated alcohols (31 examples, up to 92% yield) with additive BNDHP or α-C(sp3)–H alkylated alcohols (18 examples, up to 86% yield)
Demethylative Alkylation of Methionine Residue by Employing the Sulfonium as the Key Intermediate
作者:Qi-Long Hu、Jia-Tian Liu、Jian Li、Yang Ge、Zhendong Song、Albert S. C. Chan、Xiao-Feng Xiong
DOI:10.1021/acs.orglett.1c03241
日期:2021.11.5
Methionine (Met) offers a valuable handle to achieve peptide chemical modification owing to its unique thioether functional group. In contrast with cysteine, the site-selective functionalization of the hydrophobic and redox-sensitive thioether motif on peptides is still challenging, and strategies for diversification on the Met residue are rarely disclosed. Herein we report a transition-metal-free
由于其独特的硫醚官能团,蛋氨酸 (Met) 为实现肽化学修饰提供了一种有价值的方法。与半胱氨酸相比,肽上疏水和氧化还原敏感的硫醚基序的位点选择性功能化仍然具有挑战性,并且很少公开 Met 残基多样化的策略。在这里,我们报告了一种无过渡金属和氧化还原中性方法,用于具有底物多样性的 Met 多样化,可用于合成环肽。
High-Throughput Screening and Hit Validation of Extracellular-Related Kinase 5 (ERK5) Inhibitors
作者:Stephanie M. Myers、Ruth H. Bawn、Louise C. Bisset、Timothy J. Blackburn、Betty Cottyn、Lauren Molyneux、Ai-Ching Wong、Celine Cano、William Clegg、Ross. W. Harrington、Hing Leung、Laurent Rigoreau、Sandrine Vidot、Bernard T. Golding、Roger J. Griffin、Tim Hammonds、David R. Newell、Ian R. Hardcastle
DOI:10.1021/acscombsci.5b00155
日期:2016.8.8
The extracellular-related kinase 5 (ERK5) is a promising target for cancer therapy. A high-throughput screen was developed for ERK5, based on the IMAP FP progressive binding system, and used to identify hits from a library of 57 617 compounds. Four distinct chemical series were evident within the screening hits. Resynthesis and reassay of the hits demonstrated that one series did not return active
N-sulfonylindoline derivatives, their preparation and the pharmaceutical
申请人:Elf Sanofi
公开号:US05338755A1
公开(公告)日:1994-08-16
The invention relates to N-sulfonyl derivatives of formulae (I)" and (I)' ##STR1## and to pharmaceutical compositions in which they are present. The compounds have an affinity for the vasopressin and ocytocin receptors.