The synthesis and use in asymmetric epoxidation of metal salen complexes derived from enantiopure trans-cyclopentane- and cyclobutane-1,2-diamine
摘要:
A complete synthesis of enantiopure trans-cyclopentane-1,2-diamine and trans-cyclobutane-1,2-diamine is described. These diamines have been used as components of novel chiral salen ligands whose chromium and manganese complexes were then evaluated as oxygen transfer agents in the asymmetric epoxidation of alkenes. (C) 2003 Elsevier Science Ltd. All rights reserved.
Synthesis and Structure-Activity Relationship of Di-(3, 8-diazabicyclo[3.2.1]octane) Diquaternary Ammonium Salts as Unique Analgesics
作者:Hong Liu、Tie-Ming Cheng、Hong-Mei Zhang、Run-Tao Li
DOI:10.1002/ardp.200300749
日期:2003.11
characteristics of the lead compounds, 1, 1′ octanedioyl‐4, 4′‐dimethyl‐4, 4′‐dibenzyl dipiperazinium dibromide (2) and 3, 8‐disubstituted‐3, 8‐diazabicyclo [3.2.1]octanes (DBO), di‐(3, 8‐diazabicyclo [3.2.1]octane) diquaternary ammonium salts 3 a—c were designed and synthesized through a highly practical procedure. Target compounds 3 a—c and the hydrochloride salts of their precursors 10 a—c were evaluated
Conversion of Cysteine into Dehydroalanine Enables Access to Synthetic Histones Bearing Diverse Post-Translational Modifications
作者:Justin M. Chalker、Lukas Lercher、Nathan R. Rose、Christopher J. Schofield、Benjamin G. Davis
DOI:10.1002/anie.201106432
日期:2012.2.20
Six for the price of one: From a single precursor, dehydroalanine, six distinct post‐translational modifications can be site‐selectively installed on histone proteins (see figure), including the first site‐selective phosphorylation and glycosylation of histones. Direct observation of histone deacetylase activity on a full‐length modified histone as well as its interactions with both chromatin reader
New β-phospholactam as a carbapenem transition state analog: Synthesis of a broad-spectrum inhibitor of metallo-β-lactamases
作者:Ke-Wu Yang、Lei Feng、Shao-Kang Yang、Mahesh Aitha、Alecander E. LaCuran、Peter Oelschlaeger、Michael W. Crowder
DOI:10.1016/j.bmcl.2013.08.098
日期:2013.11
In an effort to test whether a transitionstateanalog is an inhibitor of the metallo-β-lactamases, a phospholactam analog of carbapenem has been synthesized and characterized. The phospholactam 1 proved to be a weak, time-dependent inhibitor of IMP-1 (70%), CcrA (70%), L1 (70%), NDM-1 (53%), and Bla2 (94%) at an inhibitor concentration of 100 μM. The phospholactam 1 activated ImiS and BcII at the