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Cyclohexene hydroxyethylation

Cycloaddition of 1-Dimethylamino-3-siloxy-1,3-butadiene with Methyl Acrylate Application to the Synthesis of 4-Hydroxyethyl-2-cyclohexen-1-one. [Pg.261]

In the presence of MeaSiK, cyclohexene can be hydroxyethylated in the allyl position with oxirane (Eq. 292). ... [Pg.114]

Cyclohexene oxide yields entirely tra r-2-hydroxycyclohexylcobalt tetracarbonyl. Isobutylene oxide produces a mixture of products, 93% of 2-hydroxy-2-methylpropyl- and 7% of l,l-dimethyl-2-hydroxyethyl-cobalt tetracarbonyl. [Pg.245]

Dramatically differing effects of phase-transfer catalysts on the cyclopropanation of cw,trans,trans-cyclododecatriene (61) and a series of dienes have been reported. Addition of dichlorocarbene to (61) results in tris-cyclopropanation when cetyltri-methylammonium bromide (i) is employed, whereas with benzyl-P-hydroxyethyl-dimethylammonium ion (ii) as catalyst only monocyclopropanation (of the more strained bond) is observed (Scheme 7). From the extensive study it may be concluded that, for dichlorocarbene addition, the P-hydroxyethyl catalyst restricts potential polycyclopropanation to monocyclopropanation at the most highly substituted (or strained) double bond. With dibromocarbene a different situation results. Catalyst (i) does not effect the addition of dibromocarbene to styrene, cyclohexene, or allyl bromide while catalyst (ii), with the P-hydroxyethyl function, effects dibromocyclo-propanation, in yields of up to 80 %. [Pg.16]


See other pages where Cyclohexene hydroxyethylation is mentioned: [Pg.57]    [Pg.340]    [Pg.11]    [Pg.109]    [Pg.241]    [Pg.535]    [Pg.162]    [Pg.194]   
See also in sourсe #XX -- [ Pg.114 ]




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