as evidenced by low effects on serum calcium and phosphorus levels in rats, and may accordingly exhibit an advantageous therapeutic ratio of cell modulating to calcaemic activity. The cell modulating activity of such active compounds according to the invention, combined with a substantial lack of ...
The product (91.86 g, yellowish oil) is purified by chromatography on silica gel (1 kg) using as eluant 20% ether/80% light petroleum to give ethyl 2-carbo-tert-butoxy(3',4'-dimethoxy)phenyl acetate (61.79 g). NMR (CCl4): δ 1.25, t (J=7 Hz), 3H; 1.43, s, 9H; 3.75, ...
These complexes are characterized by NMR spectroscopy, including assignment of each proton, and X-ray crystal structures of the 1-propene and 1-hexene complexes. Each complex was reacted with diethylamine. For the 1-hexene, 1-octene, and 1-decene complexes, the amine displaces the alkene. ...
HKHCa2, which was isolated from an insect, Oxya chinensis. The structure of this secondary metabolite was elucidated on the basis of its one-dimension, two-dimension NMR, and mass spectroscopic data. This natural product features a hybrid pattern of a benzoisoindole with an "iron carrier" ...
Furthermore, it contains an experiential section detailing instructions for all experiments performed and 42 NMR spectra for compounds presented in the main text. Finally, links are provided to GitHub repositories containing the fid files for all NMR spectra and the code used when generating chemo...
On the other hand, the other H2O-derived oxygen atom would be added to harmaline through nucleophilic attack by activated H2O on an electrophilic carbon before the formation of substrate Schiff base. The above result of oxygen incorporation suggests that H2O is activated in the initial step of ...
NMR spectra have also been used for evaluation ofR:Sratio ofSchiff basederivative of 1-phenylethylamine. On the basis of automated peak picking and integration procedure, after less than 2 h, the enantiomeric purity was established.R:Sratio was 34.4:65.6, which is close to the values obtained...
This study revealed that carbamic acid was formed with CO2 in both ILs by chemisorption; however, the amino acidcarboxyl groups on the anion played an importantbut differentcatalytic role for the sorption kinetics in the two ILs. The origin of the cationic effect is speculated to be correlated ...
An NMR study on the reaction of [(k~2-P,N)- Ph2PCH2CH2NMe2]PtMe2 with activated chlorocarbons: C-Cl and C-C activation, followed by C-N cleavage of the pho... An NMR study on the reaction of [(k~2-P,N)- Ph2PCH2CH2NMe2]PtMe2 with activated chlorocarbons: C-Cl and C-C...
Walsh on June 7, 1966, a catalyst made up of the reaction product between an aryl sulfonic acid and an amine was suggested for use in a similar manner when preparing tertiary alkyl halides from "tertiary" (i.e., Type III) olefins. The Walsh patent does not disclose the use of a ...