34 research outputs found
Selenium and tellurium chemistry: historical background
In this paper we present a general survey on the history of the selenium and tellurium chemistry in Brazil and worldwide
Substitution reaction between functionalized Z-vinylic tellurides and lower order cyanocuprates: synthesis of Z or E alpha,beta unsaturated esters using the same Z-vinylic telluride
Influence of different protecting groups on the regioselectivity of the hydrotelluration reaction of hydroxy alkynes
The influence of protecting groups on the synthesis of regio- and stereodefined vinyl tellurides derived from the reaction of BuTeNa and propargylic- or homo-propargylic alcohols showed that TIPS silyl ether is useful as a regiodirecting group. The application of the methodology to the synthesis of a fragment of (±)-Seselidiol, a natural product, demonstrated the applicability of the new methodology
A concise enantioselective synthesis of (+)-endo-brevicomin accomplished by a tellurium/metal exchange reaction
A homoenolate generated by tellurium/lithium exchange reaction was employed in a straightforward enantioselective synthesis of (+)-endo-brevicomin in 70% yield and 84.4% e.e.Um homoenolato gerado pela reação de troca telúrio/lítio foi aplicado na síntese enantioseletiva do (+)-endo-brevicomin com 70% de rendimento isolado e 84,4% de e.e.FAPESPCNPqCoordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES
Coupling of Vinylic Tellurides with Alkynes Catalyzed by Palladium Dichloride: Evaluation of Synthetic and Mechanistic Details
Reactive organometallics from organotellurides: application in organic synthesis
In this paper the preparation of reactive organometallics starting from organotellurides is reviewed. The application of the reactive organometallics prepared in this way in the synthesis of bioactive compounds is commented