diastereomer

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diastereomer

[¦dī·ə¦ster·ē′ō·mər]
(organic chemistry)
References in periodicals archive ?
97) As shown in Scheme 19, the terminal methyl groups of the diastereomeric Mosher esters (S,R)- and (S,S)-26, derived from [gamma]-chiral alkanol (S)-21, showed completely separate [sup.
This method avoided the formation of disulfanilated product in the first step and conducted to the product (8) in 65% yield and 59% of diastereomeric excess, calculated from the integration of the [sup.
Appellee's own prior patent application disclosed the separation of the isomers that, along with ramipril, were produced during the synthesis, stating that "[w]hen diastereomeric products result from the synthetic procedures, the diastereomeric products can be separated by conventional chromatographic .
Finally, we determined diastereomeric and enantiomeric patterns to improve current knowledge concerning isomer- and enantiomer-specific fate in the human body.
An example is the synthesis of pyrrollo-[1,4]-benzodiazepines that has an axial chiral triplet 1,7-biradical intermediate based on the rotational barrier between anthranilic acid and phthalimide and yields only one diastereomeric isomer in the cyclization reaction.
Modeling studies have indicated that several of the eight possible diastereomeric products have similar thermodynamic stability, but that two or three are most likely to be formed.
An example of asymmetric synthesis is the generation of allylglcine 10 and other unnatural [varies]-aminoacids via zinc mediated allylation in aqueous media with diastereomeric excess (de) as high as 99:1.
Broad spectrum methods for the resolution of optical isomers: A discussion of the reasons underlying the chromatographic separability of some diastereomeric carbamates.
Although it was eluted as a single product even in HPLC, its identification as a diastereomeric mixture (epimeric at C2) of 2,3-dihydroamentoflavone (2) became apparent from spectroscopic analysis (Ohmoto et al.
74) They then synthesized it as a racemic and diastereomeric mixture confirming the pheromone activity of the synthetic sample, and named it serricornin.
In chiral liquid chromatography, enantiospecific interactions between a chiral selector and the enantiomers of an analyte resulting in transient diastereomeric complexes were required in order to achieve enantioseparations.