organic compound- any compound of carbon and another element or a radical peptide- amide combining the amino group of one amino acid with the carboxyl group of another; usually obtained by partial hydrolysis of protein propanamide,proprionamide- the amide of propionic acid (C2H5CONH2) ...
Measurements of carbon to amide-proton distances by CAH dipolar recoupling with 15N NMR detection. J. Am. Chem. Soc. 2003, 125, 5648-5649.Schmidt-Rohr K, Hong M. 2003. Measurements of carbon to amide-proton distances by C-H dipolar recoupling with 15N NMR detection. J. Am. Chem. ...
E. ( 1988 ) Carbonyl 13 C NMR spectrum of basic pancreatic trypsin inhibitor: Resonance assignments by selective amide hydrogen isotope labeling and ... E Tüchsen,PE Hansen - 《Biochemistry》 被引量: 36发表: 1988年 Secondary structure and side-chain proton and carbon-13 resonance assignments ...
17O and 14N NMR studies have been conducted on a series of simple amides. The effects of solvent, temperature, and solvent concentration on the relaxation rates and nuclear screening constants have been monitored. 17O chemical shifts for the amide resonance between infinite dilution in acetone and...
1H NMR spectra of diacids I and II in DMSO-d6. the overlap shifts of C14 and C14 . The chemical shifts of C9–14 were slightly different with those of C9 –14 because of different linkages. The splitting of the 13C signals caused by couplings between carbon and fluo- rine also could...
Structures of selected compounds investigated in this study. Compound LC-KA05 (1) was shown by NMR to exist almost exclusively in the enol form, and thus its derivatives6and7are also represented as enols. The gray boxes indicate where6and7differ from1. The stereochemistry of the C-6−C-...
(IR, MS,1H and13C NMR). Compounds320–324were possessed to have the highest cytotoxicity among the eighteen compounds tested byin vitrobioassay[160]. Cui et al. in 2016 synthesized a series of D-ring fused 1,2,3-thiadiazole DHEA derivatives and were investigated against tumor cell lines ...
However, all 1H NMR spectra of polymers 3a, 3b, and 3c were identical in spite of the different regularity. It can be assumed that the differences in chemical shift of meta-disubstituted benzene ring with amide or ester bonds in polymer 3a and 3c were too small to be detected. 1H NMR ...
(Figure 1a), two spiroketal-containing polyketides, were recently isolated from a microbial metabolite fraction library of Streptomyces griseochromogenes JC82-1223 by searching for structurally unique compounds based on a spectral database.1 The carbon skeleton of spirotoamides was predicted to be ...
Proton nmr in chloroform-d: chemical shift in ppm (multiplicity, intensity, assignment): 5.78 (multiplet, 1 H, NH), 5.34 (multiplet, 4 H, CH=CH), 4.99 (multiplet, 1 H, CHO), 3.3-3.5 (multiplets, 2 H, CH2N), 2.3 (triplet, 2 H, CH2COO), 2.15 (triplet, 2 H, CH2CON), 2.0...