Learn about syn addition and anti addition. Discover examples of syn and anti stereochemistry, and examine how both syn and anti addition can produce enantiomers. Updated: 11/21/2023 Table of Contents Anti vs. Syn Addition Reactions What Is Syn Addition? What Is Anti Addition? How do ...
ChemInform Abstract: Substituent‐Directed Oxidation: The syn‐Stereochemistry of Addition of High‐Valent Oxochromium Reagents to Alkenesmulti‐membered O,S‐heterocycles (O or S ring members)rings with 7 or more membersoxirane derivativespyran derivatives...
stereochemistry (general, optical resolution)ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The ...
Addition reactions of alkenes will have specific stereochemistry in the finished product. When two atoms are added to the same side, it's a syn relationship; when two atoms are added to opposite sides it's an anti relationship. Some reactions will produce both products in equal proporti...
It was determined that the titanium tetrachloride medicated aldol reaction afforded diastereoselectivities that ranged from 75:25 to 94:6 when the reaction was conducted at 78掳C. The absolute stereochemistry of the aldol adducts was determined by1H NMR spectroscopy and X-ray crystallography. The1H ...
stereochemistry (general, optical resolution)carboxylic acid esters (acyclic compounds)carboxylic acid esters (benzene compounds)ChemInform is a weeklying Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInformof an article which was ...
For the unambiguousassignmentof the syn stereochemistrya, seriesof transformationswas carriedout on most of the diols in order to correlatetheir NMRdata with those of thoroughlydescribedcompoundsas shown on Scheme 3 (all the transformationshave been carried out on the purified synhti mixtures of ...
The stereochemistry of nucleophilic addition of amines to (E)-1-tosyl-1,3-butadiene was investigated. The Z/E ratios of the resulting allylic sulfones varied with amines, solvents, temperature, and concentration. When diethylamine was reacted in low concentration at high temperature, the ...
The stereochemistry of the diols was further confirmed by the analysis of the H NMR spectrum of the corresponding carbonates, obtained by reaction of the syn/anti mixtures with triphosgene in presence of dimethylamino﹑yridine (DMAP).doi:10.1080/00397910701863715...
It was determined that the titanium tetrachloride medicated aldol reaction afforded diastereoselectivities that ranged from 75:25 to 94:6 when the reaction was conducted at −78 °C. The absolute stereochemistry of the aldol adducts was determined by 1H NMR spectroscopy and X-ray crystallography. ...