Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Ort/zo-Quinodimethanes

The intermolecular dimerization of ort/zo-quinodimethanes to [2.2]paracyclo-phanes is an established synthetic procedure [39]. However, with extended exo-cyclic double bond systems,para- or ort/zo-quinodimethanes yield cyclophanes with alkyne groups in their bridges, such as 69, as products of an intermolecular cyclization [44]. Suchpara-quinodimethanes with cumulated double bonds are accessible via l,x elimination of bis-propargyl or benzyl bromides with Bu3SnSi-Me3/CsF [45]. Garbo- and heterocyclic unsaturated cyclophanes have been pre-... [Pg.106]

See other pages where Ort/zo-Quinodimethanes is mentioned: [Pg.244]    [Pg.198]    [Pg.244]    [Pg.141]    [Pg.244]    [Pg.198]    [Pg.244]    [Pg.141]    [Pg.166]    [Pg.105]   
See also in sourсe #XX -- [ Pg.196 , Pg.270 ]



SEARCH



Quinodimethane

Quinodimethanes

© 2024 chempedia.info