Strategies for the synthesis of bi- and triarylic materials starting from commercially available phenols
作者:Alicia B. Chopa、Gustavo F. Silbestri、María T. Lockhart
DOI:10.1016/j.jorganchem.2005.05.023
日期:2005.9
of arylstannanes have been synthesized, through an SRN1mechanism, in good to excellent yields (74%–99%) by the photostimulated reaction of trimethyl stannyl ion with substrates supporting different nucleofugal groups. The arylstannanes thus obtained were suitable intermediates for Stille cross-coupling reactions leading to asymmetric bi- and triaryl compounds in acceptable global yields. An attractive
Formation of Pentaorganostannates from Bis(2‐bromo‐2′‐biphenyl)stannanes and
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‐Butyllithium upon Substitution of Alkyl and Aryl Groups on Tin Atoms
作者:Masaichi Saito、Sanae Imaizumi、Tomoyuki Tajima
DOI:10.1002/ejic.201000089
日期:2010.5
dialkyldichlorostannanes leads to the extrusion of aryl and alkylgroups on the tinatom, affording 9-stannafluorene derivatives bearing biphenyl groups. The intermediates of the reactions were assigned to the corresponding pentaorganostannates, which were characterized by NMR spectroscopy. Unexpectedly, the dissociation of the aryl and alkylgroups from the tinatoms in intramolecular nucleophilic substitution reactions