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Carbon-oxygen donor reagents

Selenium dioxide is also an oxygen donor to alkenes. In this case, however, the initial reaction of the double bond is with the selenium center followed by two pericyclic steps. After hydrolysis of the organo-selenium intermediate, the result is a hydroxylation at the allylic carbon position65. Thus, limonene (2) yields racemic p-mentha-l,8(9)-dien-4-ol66. The high toxicity of selenium intermediates and prevalence of many rearrangements has limited the widespread use of the reagent in synthesis. [Pg.901]

Carbon-oxygen Alcohols, (decanol) Various chemical companies Niobium/tantalum donor reagents Ketones (MIBK) separation... [Pg.7]

Aluminum Reagents. Alanes are effective donors of an alkyl group to Pd(II) after the palladium insertion into a carbon-halogen or a carbon-oxygen bond. All carbon positions in pyrazine are electrophilic. Therefore, chloropyrazines can be used as substrates for the methylation with trimethylalanes as in the preparation of the methylpyrazine A-oxides 250 and 251 (Scheme Triflated 5-hydroxy-l,3-... [Pg.476]

See other pages where Carbon-oxygen donor reagents is mentioned: [Pg.959]    [Pg.320]    [Pg.141]    [Pg.273]    [Pg.7104]    [Pg.476]    [Pg.273]    [Pg.8]    [Pg.606]    [Pg.123]    [Pg.103]    [Pg.47]    [Pg.66]    [Pg.89]    [Pg.73]    [Pg.1050]    [Pg.232]    [Pg.1050]    [Pg.266]    [Pg.224]    [Pg.48]    [Pg.98]    [Pg.46]    [Pg.318]    [Pg.154]    [Pg.585]    [Pg.7]    [Pg.99]    [Pg.585]    [Pg.13]    [Pg.287]    [Pg.35]    [Pg.231]    [Pg.226]    [Pg.48]    [Pg.140]    [Pg.34]    [Pg.121]    [Pg.828]    [Pg.1280]    [Pg.46]    [Pg.22]    [Pg.140]    [Pg.118]    [Pg.1019]   
See also in sourсe #XX -- [ Pg.4 , Pg.7 ]



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Carbon oxygenated

Carbon oxygenation

Carbon-donors

Donor oxygen

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