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ALDER-RICKERT Cycloaddition

Alder-Rickert (retro Diels-Alder) cleavage of the formal cyclopropene adduct 58 (prepared by cycloaddition between norcaradiene and dimethyl acetylenedicarboxylate)... [Pg.1238]

Furans react with electron-deficient alkynes giving 7-oxabicyclo[2.2.1]heptadienes (30). Whereas it is possible to induce thermally a retro cycloaddition <62ioc3520.89CC1238>, normally these intermediates are reduced at the less hindered side, yielding 7-oxabicyclo[2.2.1]heptenes (31) (Scheme 30). Elimination of ethylene (Alder-Rickert reaction <37CB1354> yields substituted furans (Scheme 30) <6814501, 85JHC1233, 87BSF131>. [Pg.364]

See other pages where ALDER-RICKERT Cycloaddition is mentioned: [Pg.4]    [Pg.4]    [Pg.4]    [Pg.4]    [Pg.183]    [Pg.62]    [Pg.622]    [Pg.622]    [Pg.552]   
See also in sourсe #XX -- [ Pg.4 ]

See also in sourсe #XX -- [ Pg.4 ]



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