Monoimines derived from (1<i>R</i>,2<i>R</i>)-1,2-diaminocyclohexane in aza-Diels-Alder reaction: Synthesis and characterization of sulfur derivatives based on the 2-azanorbornyl skeleton

Dorsz, Mateusz; Kleniewska, Karolina; Wojaczyńska, Elżbieta

doi:10.1080/10426507.2015.1064924

Cited by 2 publications

(1 citation statement)

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“…Evans Oxazolidinone (1) Used in synthesis of cyanoacetyl oxazolidinones 25 (2) Used in asymmetric aldol reaction 26 (1) Used in synthesis of hemisalen type ligands based on chiral diamine 34 (2) Used in one pot synthesis of squaramides 35 (3) Used in aza-Diels-Alder reaction 36 (4) Used in asymmetric transfer hydrogenation 37 (dimethyl-derivatized β-cyclodextrins) with identical column diameters (30 m × 0.25 mm × 0.25 μm film thickness), which were provided by MilliporeSigma (Bellefonte, PA, USA). All solvents including methanol, acetonitrile, ethanol, and heptane were HPLC grade and purchased from EMD (Gibbstown, NJ).…”

Section: Methods Numbermentioning

confidence: 99%

Enantiomeric impurities in chiral catalysts, auxiliaries, and synthons used in enantioselective syntheses. Part 5

et al. 2019

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The enantiomeric excess of chiral starting materials is one of the important factors determining the enantiopurity of products in asymmetric synthesis. Fifty‐one commercially available chiral reagents used as building blocks, catalysts, and auxiliaries in various enantioselective syntheses were assayed for their enantiomeric purity. The test results were classified within five impurities level (ie, <0.01%, 0.01%‐0.1%, 0.1%‐1%, 1%‐10%, >10%). Previously from 1998 to 2013, several reports have been published on the enantiomeric composition of more than 300 chiral reagents. This series of papers is necessitated by the fact that new reagents are forthcoming and that the enantiomeric purity of the same reagent can vary from batch to batch and/or from supplier to supplier. This report presents chiral liquid chromatography (LC) and gas chromatography (GC) methods to separate enantiomers of chiral compounds and evaluate their enantiomeric purities. The accurate and efficient LC analysis was done using newly introduced superficially porous particle (SPP 2.7 μm) based chiral stationary phases (TeicoShell, VancoShell, LarihcShell‐P, and NicoShell).

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Section: Methods Numbermentioning

confidence: 99%