Homologation of halostannanes with carbenoids: a convenient and straightforward one-step access to α-functionalized organotin reagents
作者:Saad Touqeer、Laura Castoldi、Thierry Langer、Wolfgang Holzer、Vittorio Pace
DOI:10.1039/c8cc04786c
日期:——
A direct, single synthetic homologative transformation of halostannanes into mono- or di-substituted methyl analogues is documented. Critical for the success of the operation is the excellent nucleophilicity of carbenoid-like methyllithium reagents (LiCHXY, X, Y = halogen, OR, and CN): by simply individuating the reagents’ substitution pattern, the desired functionalized fragment is delivered to the
Organometallic reactions. Part XVI. Trihalogenomethyltin compounds: their preparations, properties, and reactions
作者:Alwyn G. Davies、T. N. Mitchell
DOI:10.1039/j39690001896
日期:——
these can then be reduced by trialkyltin hydrides or by lithium aluminium hydride to give the di- and mono-halogenomethyltin compounds, R3Sn·CHX2 and R3Sn·CH2X, respectively. Some properties and reactions of these products have been investigated.
作者:Yaodong Huang、Jinsong Zhang、Thomas R. R. Pettus
DOI:10.1021/ol0523749
日期:2005.12.1
[GRAPHICS]A short synthesis of (+/-)-brazilin is reported. This synthesis uses several interesting and underutilized transformations including a regioselective dirhodium-catalyzed aryl C-H insertion, a regioselective IBX phenol -> o-quinone oxidation, a tautomerization of an o-quinone to a p-quinone methide, and an intramolecular aryl cyclization with a p-quinone methide.