In stereochemistry, an epimer is one of a pair of diastereomers. The two epimers have opposite configuration at only one stereogenic center out of at least...

tertiary stereogenic C5 and C8 positions, rendering these centers prone to epimerisation. The C8 proton is more labile due to the electron-withdrawing carboxamide...

enantiomers do not racemize readily. All three stereoisomers undergo epimerisation in the presence of organic and inorganic bases in solution. Lactide...

oxidation). In some cases, the use of triethylamine as the base can lead to epimerisation at the carbon alpha to the newly formed carbonyl. Using a bulkier base...

the two activities have been found in heparin and some species of HS. Epimerisation is catalysed by one enzyme, the GlcA C5 epimerase or heparosan-N-sulfate-glucuronate...

a moderate (40 to 90 °C (104 to 194 °F)) heating for a few minutes. Epimerisation may happen. Phloroglucinolysis can be used for instance for proanthocyanidins...

water. They involve a moderate (50 to 90 °C) heating for a few minutes. Epimerisation may happen. Phloroglucinolysis can be used for instance for proanthocyanidins...

appears here, with some accessible content, but not the content on the epimerisation of menthone-isomenthone, see this link. Sandborn, L. T. (1929). "l-Menthone"...

5-diketopiperazines is based on the use of sodium hydride as base. However epimerisation can occur especially with proline-fused 2,5-diketopiperazines, even...

van Ekenstein transformation and related reactions, in: Glycoscience: epimerisation, isomerisation and rearrangement reactions of carbohydrates, Vol. 215...

published the preparation of a novel unnatural sugar, l-ribose, by the epimerisation of L-arabonic acid and reduction of the resulting lactone. It was not...

synthesis. Stereochemically, the phosphoramidite coupling leads to the epimerisation (forming of diastereomers) at the P(III) chiral center. When water is...

ISBN 978-3-527-61710-4. Stütz, Arnold E., ed. (2001). Glycoscience Epimerisation, Isomerisation and Rearrangement Reactions of Carbohydrates. Berlin...

hydrochloric acid hydrolysis of the activated phenolic amide caused epimerisation at the exocyclic position and yielded the acid 10 with the required...

hydrochloric acid hydrolysis of the activated phenolic amide caused epimerisation at the exocyclic position and yielded the acid 7 with the required...