نتایج جستجو برای: coumarin hemiterpene ether derivatives
تعداد نتایج: 128554 فیلتر نتایج به سال:
The reaction of the cyanoacetylhydrazine (1) with α-bromoketones (2a-c) gave the hydrazide-hydrazone derivatives 3a-c. The latter compounds underwent ready cyclization when heated in sodium ethoxide to form the 1,3,4-oxadiazine derivatives 4a-c. The reaction of 3a with hydrazines gave the 1,3,4-triazine derivatives 7a,b. Compounds 3a-c and 7a,b underwent some heterocyclizations when treated wit...
The rotational dynamics of coumarin 153 (C153) in imidazolium-based ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF(6)]) and tetraethylene glycol dimethyl ether (TEGDME) mixtures across all mole fractions have been investigated to determine the local viscosity of the microenvironment surrounding the probe molecules. The excimer-to-monomer fluorescence emission intensity ...
O6-alkylguanine-DNA alkyltransferase (AGT) fusion proteins can be specifically and covalently labeled with fluorescent O6-benzylguanine (O6-BG) derivatives for multicolor live cell imaging approaches. Here, we characterize several new BG fluorophores suitable for in vivo AGT labeling that display fluorescence emission maxima covering the visible spectrum from 472 to 673 nm, thereby extending th...
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