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Oxabutadiene cationic

Schmidt has demonstrated that selected /J-acyl vinyl carbocations, generated from /J-chlorovinyl ketones226 or from the in situ acylation of acetylenes, react with acetylenes to provide pyrylium salts presumably with 4ir participation of the cationic oxabutadienes in [4+ + 2] cycloadditions [Eq. (55)].226... [Pg.287]

See other pages where Oxabutadiene cationic is mentioned: [Pg.451]    [Pg.501]    [Pg.501]    [Pg.451]    [Pg.501]    [Pg.501]    [Pg.107]    [Pg.107]    [Pg.271]    [Pg.287]    [Pg.287]    [Pg.167]    [Pg.202]    [Pg.202]    [Pg.203]    [Pg.203]   
See also in sourсe #XX -- [ Pg.202 , Pg.203 ]



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1.3- oxabutadienes

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