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dc.contributor.authorConejero, Salvador-
dc.contributor.authorSong, Maoying-
dc.contributor.authorMartín, David-
dc.contributor.authorCanac, Yves-
dc.contributor.authorSoleilhavoup, Michèle-
dc.contributor.authorBertrand, Guy-
dc.date.accessioned2011-07-22T11:15:11Z-
dc.date.available2011-07-22T11:15:11Z-
dc.date.issued2006-07-10-
dc.identifier.citationChemistry - an Asian Journal 1(1-2): 155-160 (2006)es_ES
dc.identifier.otherPMC2427273-
dc.identifier.urihttp://hdl.handle.net/10261/37932-
dc.description6 páginas, 8 esquemas.es_ES
dc.description.abstractPhosphonio-substituted aldiminium, iminium, and imidazolidinium salts are readily prepared by the addition of phosphines to the Alder dimer or by treatment of the corresponding chloroiminium salt with the phosphine/trimethylsilyl triflate adduct generated in situ. Reduction with either potassium metal or tetrakis(dimethylamino)ethylene leads to the corresponding C-amino phosphorus ylides. When basic phosphine fragments are used, the ylides can be isolated; otherwise they fragment into the carbene and phosphine. This method is limited to the preparation of transient carbenes, owing to the unavailability of sterically hindered dications, and consequently of phosphorus ylides with bulky carbon substituents. This difficulty is overcome by the addition of 2,4-di-tert-butyl-ortho-quinone to readily available C-amino phosphaalkenes at low temperature. Provided the phosphorus atom bears either an amino or tert-butyl group, [4+1] cycloaddition occurs, and the resulting ylides fragment into a dioxaphospholane and a spectroscopically observed carbene.es_ES
dc.description.sponsorshipWe are grateful to the NIH (R01 GM 68825) for financial support.es_ES
dc.language.isoenges_ES
dc.publisherWiley-VCHes_ES
dc.rightsclosedAccesses_ES
dc.subjectCarbeneses_ES
dc.subjectDicationses_ES
dc.subjectIminium saltses_ES
dc.subjectPhosphoruses_ES
dc.subjectYlideses_ES
dc.titleNew Synthetic Routes to C-Amino Phosphorus Ylides and their Subsequent Fragmentation into Carbenes and Phosphineses_ES
dc.typeartículoes_ES
dc.identifier.doi10.1002/asia.200600075-
dc.description.peerreviewedPeer reviewedes_ES
dc.relation.publisherversionhttp://dx.doi.org/10.1002/asia.200600075es_ES
dc.identifier.e-issn1861-471X-
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