Studies ontrans-Dicyanodiethoxycarbonylethylene. III. Diels-Alder Reaction
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چکیده
منابع مشابه
The Diels-Alder Reaction: an Update
In this update on the Diels-Alder reaction we would like to present an overview on how this very important reaction has progressed in the last decade, since the last spate of monographs and reviews appeared in the literature, and which deal with the reaction in the overall sense. Initially we present the Diels-Alder reaction in a generalised form, much as discovered over seventy years ago, so t...
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The aqueous Diels-Alder reaction of 1,3-cyclohexadiene with 1,4-benzoquinone was compared and contrasted to the same reaction catalyzed with Flextyl P, a novel Ti(IV) performance catalyst. The catalyst improved conversion by 22% versus the uncatalyzed reaction and represents a rare example of a Ti(IV) catalyzed Diels-Alder reaction in water.
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A variety of organocatalysts were screened for the catalysis of the naphthoquinone monoketal Diels-Alder reaction. In this study we found that Schreiner's thiourea catalyst 10 and Jacobson's thiourea catalyst 12 facilitate the cycloaddition of the sterically hindered naphthoquinone monoketal dienophile 3 with diene 4. The use of thiourea catalysis allowed for the first time the highly selective...
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Rate acceleration and selectivity enhancement of organic reactions such as Diels-Alder or Ene reac tions using water [1] as a solvent or clay supported reagents [2 ] have recently attracted much interest. The underlaying reason for their influence on the reaction rates and selectivity, has been ascribed to hydrophobic association of the reactants, as in the case of water, or the presence of wa...
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ژورنال
عنوان ژورنال: Bulletin of the Chemical Society of Japan
سال: 1962
ISSN: 0009-2673,1348-0634
DOI: 10.1246/bcsj.35.1842