検索結果 4 件
デジタル記事
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- 参照A Chiral Recognition System Orche......y: Molecular Chirality, Self‐Assemb......ce Response Helical springs as a color indicator for determining chirality and enantiomeric excess
- 寄与者Volker Schurig
- 出版者（掲載誌）Springer International Publishing
デジタル記事
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- 要約等<jats:title>Abstract</jats:title> ......ts:p>Treatment of (R)-(−)-menthyl benzoates, which have a variety of meta- or para-substituents, with 2 equivalents of racemic lithiomethyl p-tolyl sulfoxide displays the feature of an enantiomer-differentiating reaction, affording the corresponding optically active β-keto sulfoxides. The degree and the direction of enantioselectivity were affecte...... by the nature of the substituent on benzene ring. The electron-releasing substituents trend to increase the %e........ The reversal in the configuration with the variation in the substituent which has a high electron-withdra...
- 件名General Chemistry
- 参照Substituent Effect on the Enantioface-Differentiating Reaction of (<i>R</i>)-[Lithiomethyl <i>p</i>-Tolyl Sulfoxide] with <i>m</i>- or <i>p</i>-Substituted Acetophenones
デジタル記事
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- 要約等<jats:title>Abstract</jats:title> ......ts:p>Treatment of (−)-menthyl carboxylates(2) with 2 equiv of p-tolylsulfinylcarbanion(1) afforded the corresponding optically active β-keto sulfoxides(3) together with optically active methyl p-tolyl sulfoxide. The enantiomeric purity and the predominant configuration of the products were discussed.</jats:p>
- 件名General Chemistry
- 参照β-Disulfoxides. II. The Preparation of Some Optically Active β-Disulfoxides Absolute Configuration and Optical Rotatory Power of Sulfoxides and Sulfinate Esters<sup>1,2</sup>
デジタル記事
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- 要約等<jats:title>Abstract</jats:title> ...... <jats:p>Enantiomer differentiation has been observed in the initial 1,5-phenyl shift of the sensitized photorearrangement of racemic 3-methyl-3-phenyl-2(3H)-oxepinone with chiral N-(1-phenyl......thalenecarboxamides leading to optically active 4-methyl-7-e......o-phenyl-2-oxabicyclo[4.1.0]hept-4-en-3-one.</...
- 件名General Chemistry
- 参照Studies in Stereochemistry. VI. The Mechanisms of the E<sub>1</s...... and Hydrogen Migration Reactions in the 3-Phenyl-......e methyl-tetralines optiquement actives A novel photochemical rearrangement of 3-phenylated 2(3H)-oxepinones General m...... for the determination of steric effects during collisional energy transfer. Partial photoresolution of penta-2,3-diene MOLECULAR REARRANGEMENTS INVOLVING OPTICALLY ACTIVE RADICALS. IX. FURTHER STUDIES ON THE WOLFF REARRANGEMENT OF OPTICALLY ACTIVE DIAZOKETONES Mole......Rearrangements Involving Optically Active Radicals. X. The Retention of Configuration in the Wolff Rearrang...
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