Results 231 to 240 of about 311,501 (299)

Stereodivergent Synthesis of C5-α-Substituted Linezolid Derivatives From D-Mannitol and Structure-Antibacterial Activity Evaluation. [PDF]

Chirality
Gálvez JA, Sanz-Asensio L, Badorrey R, Gonzalo-Asensio J.   +3 more
europepmc   +1 more source

Ir/Rh-catalyzed hydrogenation of squalene: access to stereoregular squalane. [PDF]

RSC Adv
Iovine T, Ehm C, Kaluarachchige Don UI, Busico V, Veige AS, Cipullo R.   +5 more
europepmc   +1 more source

Contact-Time Dependence and Cross-Polarization Kinetics of Apparent Signal Distributions in CP/MAS ¹³C NMR Spectra of Humic Acids. [PDF]

Molecules
Lodygin E, Vasilevich R, Abakumov E.
europepmc   +1 more source

In Vitro-Prepared A30P Alpha-Synuclein Fibrils Adopt the Conserved and Disease-Relevant Greek Key Fold. [PDF]

J Phys Chem B
Milchberg MH, Warmuth OA, Borcik CG, Han R, Harding BD, DeZonia B, Dhavale DD, Pierson JA, Kotzbauer PT, Wright ER, Schwieters CD, Rienstra CM.   +11 more
europepmc   +1 more source

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Application of 13C-labeling and 13C–13C COSY NMR experiments in the structure determination of a microbial natural product

Archives of Pharmacal Research, 2013
The elucidation of the structures of complex natural products bearing many quaternary carbons remains challenging, even in this advanced spectroscopic era. (13)C-(13)C COSY NMR spectroscopy shows direct couplings between (13)C and (13)C, which comprise the backbone of a natural product.
Dong-Chan Oh, Jongheon Shin, Sunghyouk Park   +2 more
exaly   +3 more sources

[1,2,3,4-13C] Testosterone and [1,2,3,4-13C] estradiol

Steroids, 1984
The preparation of [1,2,3,4-13C] testosterone and of [1,2,3,4-13C] estradiol by total synthesis is described. The 13C labels are introduced by alkylating intermediate 1 with [1,2,3,4-13C]l-iodo-3,3-ethylenedioxybutane (2) to obtain intermediate 10. Hydrolysis of the ketal function, cyclization, aromatization and removal of protective groups gave [1,2,3,
G, Zomer, H, Wynberg, N M, Drayer
openaire   +4 more sources

Accurate determinations of one-bond 13C–13C couplings in 13C-labeled carbohydrates

Journal of Magnetic Resonance, 2013
Carbon plays a central role in the molecular architecture of carbohydrates, yet the availability of accurate methods for (1)D(CC) determination has not been sufficiently explored, despite the importance that such data could play in structural studies of oligo- and polysaccharides.
Hugo F, Azurmendi, Darón I, Freedberg
openaire   +2 more sources

Editing of 13C13C satellite spectra

Journal of Magnetic Resonance (1969), 1988
Abstract The SEMUT and DEPT spectral editing techniques are combined with the techniques INADEQUATE and SLAP for observation of 13C13C satellites in natural abundance samples. The theory is documented by experimental edited spectra, in some cases exhibiting dramatic simplification compared to the normal spectra.
Niels Chr Nielsen, Henrik Bildsøe, Hans J jakobsen, Ole W S/orensen   +3 more
openaire   +1 more source