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Alkynes alkoxymercuration

The alkoxymercuration-demercuration of alkenes, dienes and alkynes in the presence of alcohols provides an even more versatile approach to the corresponding ethers than the acid-catalyzed process. This reaction has been extensively studied and thoroughly reviewed recently.415 The reaction of alkenes is best carried out using meicury(II) acetate or, for more highly substituted alcohols or alkenes, mercury(II) trifluoroacetate (equation 257).416,417... [Pg.309]

The alkoxymercuration of conjugated dienols does not appear to have been examined, while allenic alcohols provide unsaturated ethers (equation 269)452 The alkoxymercuration of alkynes generally provides vinylic ethers453 or acetals454 depending on the reaction conditions (equations 270 and 271). Only catalytic amounts of mercuiy salts are generally... [Pg.311]

On irradiation in the presence of alkynes the stable zwitterion (49) yields 5,7-dinitrobenzofuran (Equation (51)) <86JOC3453>. In an intramolecular alkoxymercuration reaction phenyl ethers of type (50) are cyclized with mercury(II) acetate to give mercurated benzofurans (Equation (52)) <84JA4218, 86JOC3453>. [Pg.369]

See other pages where Alkynes alkoxymercuration is mentioned: [Pg.1304]    [Pg.312]    [Pg.856]   
See also in sourсe #XX -- [ Pg.312 , Pg.313 , Pg.314 , Pg.315 ]

See also in sourсe #XX -- [ Pg.4 , Pg.312 , Pg.313 , Pg.314 , Pg.315 ]

See also in sourсe #XX -- [ Pg.4 , Pg.312 , Pg.313 , Pg.314 , Pg.315 ]



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Alkoxymercuration

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