Herein, we report the reaction monitoring of the alkylation of adenine in DMSO in the presence of NaH using benzylic halides via real-time H-1 NMR spectroscopy. NMR analysis revealed that under these generally used reaction conditions, the adeninate anion starting material is protonated as the ...
Exchange peaks in the ROESY spectra confirmed the presence of four interchanging conformational isomers. Based on integrations, the relative populations of the four species were estimated, while characteristic sequential nuclear Overhauser enhancements (NOEs) were used to determine the orientation of the ...
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exchange rates of t he mo bile p roto ns wit h t he t racer amo unt of water in DM SO and CDCl3 have been evaluated. Local st ruct ures of t he pep tide have been suggested and pep tide2solvent interactio ns have been discussed. ...
The peak due to the pi-pi* transition of 3a was observed at 415 nm, which was bathochromic shifted in comparison with that of the monomer 1 and the corresponding homopolymers. The emission peaks of 3a was observed at 531 nm (excitation wavelength at 415 nm). The cyclic voltammogram showed...
aFlow cytometry analysis of nuclear preparations from entire young leaves of 1–3 cm in length revealed that there were three peaks of fluorescence corresponding to 2C, 4C and 8C DNA content of somatic cells (Fig. 1A). About 50% of the nuclei were found to have 2C DNA content, 25% we...
Migrating H NMR peaks in the benzylation of adenine reveal the disruptive Kornblum oxidation in DMSOdoi:10.1002/jhet.4718Buyens, Dominique M. S.Pilcher, Lynne A.Journal of Heterocyclic Chemistry
The 1H MAS NMR chemical shifts of the two methyl groups in DMSO-K are not equivalent and can be attributed to the 2.9 and 4.2 ppm peaks. The 27Al MAS NMR spectra of KGa-1b obtained under different magnetic fields revealed that most of the quadrupolar effects were highly reduced at 21.1...
Lowe, published in volume 41 of 'Tetrahedron Letters,' on the use of trifluoroacetic acid to minimize water problems in dimethyl sulphoxide (DMSO) nuclear magnetic resonance (NMR) spectra. Hygorscopic nature of d(sub 6)-DMSO; Water peaks produced with the addition of deuterated trifluoroacetic ...
By contrast, the reverse scan displays two anodic peaks. Constant potential electrolysis at -1.0 V and TLC analysis of the product reveals that the reduction of azo group (in the bridge) in HQAB does not stop at the hydrazo stage but goes further through the cleavage of -NH-NH- linkage...