نتایج جستجو برای: preparation of cis 3 azido 4 styryl 2 azetidinone
تعداد نتایج: 21671370 فیلتر نتایج به سال:
The addition of a purified mitochondrial pyridine nucleotide transhydrogenase enzyme preparation to complex I (NADH-CoQ reductase) results in a significant increase in the NADPH-AcPyAD+ transhydrogenase activity of the complex without influencing the NADH-AcPyAD+ transhydrogenase activity. When subjected to sodium dodecyl sulfate-polyacrylamide gel electrophoresis in the presence of complex I, ...
• New stilbene derivatives were synthesized for the role of efficient photosensitizers. Application in 3D printing using vat polymerization, visible based direct ink writing. Preparation fiber-reinforced composite and formation MCNTs nanocomposites. meta - para -cyanoderivatives 1,4-di(styryl)benzene 1,3-di(styryl)benzene investigated their use as photosensitizers iodonium salt various photopol...
The intermolecular [2 + 2]-photocycloaddition of the parent flavone molecule (4) as triplet energy-accepting species and electron-rich alkene 2, 3-dihydrofuran (5) was performed by visible-light-mediated triplet-sensitization with an iridium-based organometallic sensitizer. reaction proceeds high diastereo- regioselectivity (>98:2 for regiochemical orientation 95% d.s.). In contrast to numer...
In contrast to theoretical expectations, the photolysis of 2,4,6-triazido-3-chloro-5-fluoropyridine in argon at 5 K gives rise to EPR peaks of just two triplet mononitrenes, two quintet dinitrenes, and a septet trinitrene. EPR spectral simulations in combination with DFT calculations show that observable nitrenes can be assigned to triplet 2,4-diazido-3-chloro-5-fluoropyridyl-6-nitrene (D T = 1...
The synthesis and study of the structure-activity relationships of a series of rigid analogues of combretastatin A-4 are described which contain the 1,4-diaryl-2-azetidinone (β-lactam) ring system in place of the usual ethylene bridge present in the natural combretastatin stilbene products. The 1,4-diaryl-2-azetidinones are unsubstituted at C-3, or contain methyl substituent(s) at C-3. The most...
Abstract In this study, the alumina layer on surface of aluminum powder was removed with hydrofluoric acid. 2-Azido-1,3-dimethylimidazolinium Hexafluorophosphate (ADMHFP) and 4-azido-2,3,5,6-tetrafluorobenzoic acid (ATFBA) were coated to form Al@ADMHFP Al@ATFBA. Scanning electron microscope FTIR test results proved that ADMHFP ATFBA powder. The Al@ATFBA showed better thermal reaction combustion...
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