as documented by the clicking of carbohydrates with indolealkaloids. The method is also applicable to the conjugation of polymer chains. The linking acetal moiety can be readily cleaved and it is also shown that wavelength-selective coupling and cleavage with acyl silanes bearing a second photoactive moiety is possible. This is documented by a successful polymerization/depolymerization sequence and
Can relief of ring-strain in a cyclopropylmethyllithium drive the Brook rearrangement?
作者:Jonathan Clayden、David W. Watson、Mark Chambers
DOI:10.1016/j.tet.2004.10.099
日期:2005.3
2]-Brook rearrangement led to α-silyloxy organolithiums which on warming underwent cyclopropane ringopening and [1,5]-retro-Brook rearrangement to yield γ-silyl ketones. Despite the favourability of the cyclopropane ringopening, the Brookrearrangement still required the presence of an anion stabilising group to proceed. β-Silylketones were similarly formed by Brook–retro-Brook rearrangement on warming
Facile photochemical synthesis of mixed siloxyacetal glycosides as potential pH-sensitized prodrugs for selective treatment of solid tumors
作者:Serge A. Svarovsky、Marc B. Taraban、Joseph J. Barchi, Jr.
DOI:10.1039/b405786d
日期:——
one of the novel siloxyacetals was confirmed by X-ray crystallography. In vitro biological studies showed that glucose-derived siloxyacetals may serve as potential pH-activated prodrugs for selectivetreatment of solidtumors.