Novel hydrazone-based and oxime-based fluorescent and chromophoric/pro-fluorescent and pro-chromophoric reagents and linkers
申请人:Schwartz David A.
公开号:US20080221343A1
公开(公告)日:2008-09-11
Conjugationally extended hydrazine compositions of the formula (RR
2
)N(H)
n
(NH
2
)
n
, fluorescent hydrazone compositions of the formula (RR
2
)NN═C(R
1
R
2
), methods of the formation of hydrazones from the reaction of conjugationally extended hydrazines with conjugationally extended carbonyls and methods of their use in assays systems are described. Use of these conjugationally extended hydrazine and oxime compositions for direct calorimetric and fluorometric assays wherein a chromophore or the fluorophore is incorporated into the linker that is positioned between a reactive linking moiety and a biotin molecule. More specifically the linker comprises one molecule of a high affinity binding pair such as for example biotin of the biotin/avidin high affinity binding pair, connected to a spacer molecule such as for example a length of polyethyleneglycol followed by a pro-chromophoric, chromophoric, pro-fluorescent or fluorescent moiety connected to an amino-, thiol- or carbohydrate-reactive moiety such as for example succinimidyl, maleimido or aminoxy group respectively, that may covalently link to a biomolecule.
Flow-Mediated Synthesis of Boc, Fmoc, and Dd<i>iv</i> Monoprotected Diamines
作者:ThingSoon Jong、Mark Bradley
DOI:10.1021/ol503343b
日期:2015.2.6
A series of monoprotected aliphatic diamines (21 examples) were synthesized via continuous flow methods. The carbamates and enamines were obtained in 45-91% yields using a 0.5 mm diameter PTFE tubular flow reactor. Using readily accessible protecting group precursors, the procedure serves as an attractive alternative to existing batch-mode synthetic routes by providing direct, multigram access to N-Boc-, N-Fmoc-, and N-Ddiv-protected compounds with productivity indexes of 1.2-3.6 g/h.
A Disulfide Intercalator Toolbox for the Site-Directed Modification of Polypeptides
作者:Tao Wang、Yuzhou Wu、Seah Ling Kuan、Oliver Dumele、Markus Lamla、David Y. W. Ng、Matthias Arzt、Jessica Thomas、Jan O. Mueller、Christopher Barner-Kowollik、Tanja Weil
DOI:10.1002/chem.201403965
日期:2015.1.2
A disulfideintercalatortoolbox was developed for site‐specific attachment of a broad variety of functional groups to proteins or peptides under mild, physiological conditions. The peptide hormone somatostatin (SST) served as model compound for intercalation into the available disulfide functionalization schemes starting from the intercalator or the reactive SST precursor before or after bioconjugation