In stereochemistry, a stereocenter of a molecule is an atom (center), axis or plane that is the focus of stereoisomerism; that is, when having at least...

(related) stereocenters and are not mirror images of each other. When two diastereoisomers differ from each other at only one stereocenter, they are epimers...

stereogenic element is a stereogenic center, or stereocenter. In the case of organic compounds, stereocenters most frequently take the form of a carbon atom...

purpose of the CIP system is to assign an R or S descriptor to each stereocenter and an E or Z descriptor to each double bond so that the configuration...

Increased complexity arises because each end of the new bond may become a stereocenter. Modern methodology has not only developed high-yielding aldol reactions...

Second asterisks are placed by potential stereocenters as indicators (*). Third the pairs of each stereocenters R and S orientations are combined through...

the same, then there is no stereoisomer and the double bond is not a stereocenter, e.g. propene, CH3CH=CH2 where the two substituents at one end are both...

3-aminopropanoic acid. Unlike its counterpart α-alanine, β-alanine has no stereocenter. In terms of its biosynthesis, it is formed by the degradation of dihydrouracil...

is assigned to the stereocenter if the direction of rotation is directed to the right. If one molecule contains several stereocenters, a locant must be...

a type of stereocenter. A chirality center is also called a chiral center or an asymmetric center. Some sources use the terms stereocenter, stereogenic...

constitutional isomers. 8 of these isomers have one stereocenter; 3 of them have two stereocenters. Achiral Isomers: 2-Methylheptane 4-Methylheptane 3-Ethylhexane...

stereocenters. In the image of RRR-α-tocopherol below, all three stereocenters are in the R form. However, if the middle of the three stereocenters were...

ruthenium catalyst and a chiral bisphosphine ligand sets the second stereocenter. The carboxylate is esterified by reaction with thionyl chloride to form...

share a framework isomerism. The aporphine alkaloids usually have a stereocenter. The (R)-configured glaucine can be synthesized from (S)-glaucine. Apomorphine...

Butan-2-yl (sec-butyl) group is chiral. The carbon atom at position 2 is a stereocenter. It has four different groups attached: −H, −CH3, −CH2−CH3, and −R (the...

fragment was a chirally catalyzed ene reaction that installed the C15 stereocenter. Treatment of the terminal allyl group of compound 1 with ethyl glyoxylate...

octane. Its structural formula is CH3CH2CH(CH3)CH2CH2CH2CH3. It has one stereocenter. Its refractive index is 1.398 (20 °C, D).[citation needed] "3-METHYLHEPTANE...

are optically active. This means that despite containing two or more stereocenters, the molecule is not chiral. A meso compound is superposable on its...

analogs include diphenhydramine, and doxylamine. Pheniramine contains a stereocenter and can exists as either of two enantiomers. The pharmaceutical drug...

and Neomycin C are stereoisomers of each other and differ by only one stereocenter one giving the R conformation and the other giving the S conformation...

2-pentanol, and 3-methyl-2-butanol (methyl isopropyl carbinol), contain stereocenters, and are therefore chiral and optically active. The most important amyl...

C-C distances. The energy barrier for the nitrogen inversion of the stereocenter is about 7 kcal/mol for a trialkylamine. The interconversion has been...

and Sa in analogy to the traditional R/S for a traditional tetrahedral stereocenter. Axially chiral biaryl compounds are prepared by coupling reactions,...

needed] Cholesterol has 256 stereoisomers that arise from its eight stereocenters, although only two of the stereoisomers have biochemical significance...

purity in the final drug substance, and hence establishing the first stereocenter became a key aspect of the overall design. The final commercial production...

has three stereocenters, so it is a chiral molecule. The eight stereoisomers of α-tocopherol differ in the configuration of these stereocenters. RRR-α-tocopherol...

describing a molecule's stereochemistry. They rank the atoms around a stereocenter in a standard way, allowing the relative position of these atoms in the...

acids except glycine (the simplest one) are optically active, having a stereocenter at their α-C atom. This means that the amino acid can have two different...

derivatives such as ketoprofen, flurbiprofen and naproxen, contains a stereocenter in the α-position of the propionate moiety. The product sold in pharmacies...

mixture of stereoisomers during a non-stereospecific creation of a new stereocenter or during a non-stereospecific transformation of a pre-existing one....