Coupling Reactions of Diazonium Betaines with Alkyl Dicyanoacetates
作者:Richard Neidlein、Zhihua Sui
DOI:10.1080/00397919208021297
日期:1992.1
Abstract The reactions of heterocyclic diazonium betaines, 4-aryl-3-diazo-pyrazole and 3-diazo-indazole, at the α-carbon atoms of alkyl dicyanoacetates gave corresponding azo-compounds.
[11C]Lithium trimethylsilyl ynolate: a new [11C] precursor and its application in heterocyclic synthesis
作者:Michael W. Nader、Franz Oberdorfer
DOI:10.1016/j.tetlet.2011.02.066
日期:2011.5
[11C]Lithium trimethylsilyl ynolate was characterized to be a new precursor in carbon-11 chemistry. It was obtained from [11C]carbonmonoxide and lithiated silyldiazomethane. The new precursor might be of high potential for the incorporation of carbon 11 into heterocyclicringsystems for which labeling methods are not well developed. More examples will certainly follow if other researchers will apply