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Cyclopentadienes hydrogen-bond donor catalysed

The strong dependence of the reaction rate on the catalyst concentration relative to control experiments in which the amino-hydrogen atoms of 7 were substituted by methyl groups demonstrate that hydrogen bonding represents the major interaction responsible for the observed accelerations. Diels-Alder reactions are also accelerated by hydrogen-bond donors. It was shown that a biphenylenediol 9 is able to catalyse [4 + 2]-cycloadditions of cyclopentadiene, 2,3-dimethylbutadiene and other simple dienes with various a,fi-unsaturated carbonyl compounds (Table 14)175. [Pg.1060]


See also in sourсe #XX -- [ Pg.1060 , Pg.1061 ]

See also in sourсe #XX -- [ Pg.1060 , Pg.1061 ]

See also in sourсe #XX -- [ Pg.1060 , Pg.1061 ]




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Cyclopentadiene hydrogenation

Donor bonds

Donor hydrogenation

Hydrogen bonding donors

Hydrogenation hydrogen donors

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