diastereoisomer

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diastereoisomer

(ˌdaɪəˌstɛrɪəʊˈaɪsəmə) or

diastereomer

n
(Chemistry) chem a type of isomer that differs in the spatial arrangement of atoms in the molecule, but is not a mirror image; a stereoisomer that is not an enantiomer
Translations
diastéréo-isomère
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References in periodicals archive ?
The presence of two resonance peaks for Cspiro in 65-76 ppm for adducts 7(a-c) and one peak for adducts 7d and 8 also established that one or two diastereomer exist in the products.
This provided clear distinction between the respective enantiomers of each HBCD diastereomer in the resulting chromatograms (Figure 3).
Spatial diastereomer patterns of hexabromocyclododecane (HBCD) in a Norwegian fjord.
Of all the forms, the studies of its threo diastereomer revealed that d-threo isomer has been found to be more active and also showed significant metabolic difference than l-threo enantiomer.
Since this reaction introduces two chiral carbons into the product, the cis alkenes are known to form a racemic mixture, and the trans isomer forms a stereospecific meso diastereomer.
Moreover, during the oxidative work-up procedure in basic conditions the lactone ring may open and, together with the following relactonization, there is a risk of racemization of (1S, 5R, 6R)4a (the enantiopurity of the other diastereomer (1S, 5R, 6S)-4a is not affected).
11) The noteworthy features of the synthesis are: the hydroxyl and the carboxylic acid functions in the reactants do not require protection-deprotection chemistry; the C-C bond formation step provides useful syn-selectivity giving the desired diastereomer.
It was shown that two of the lamoxirenes, compound 1 and its diastereomer 3 (Fig.
This past summer we worked on the synthesis of one diastereomer of this peptidomimetic.
In category C, only one enantiomer is bioactive, and its diastereomer inhibits the action of the pheromone.
In the so-called SS diastereomer, the dioxolane ring lies perpendicularly to the channel axis.