A general method of synthesis of functionalized Z-vinylic tellurides starting from β-dicarbonyl compounds
作者:Rafael E Barrientos-Astigarraga、Priscila Castelani、Celso Y Sumida、Julio Zukerman-Schpector、João V Comasseto
DOI:10.1016/s0040-4020(01)01204-2
日期:2002.2
Z-Vinylic tellurides are prepared by stereoselective vinylic substitution on Z/E mixtures of enolphosphates, acetates, tosylates and triflates by organotellurolates. The reaction is sensitive to the nature of the organotellurolate; the aromatic derivatives react slower than the aliphatic ones. The reaction time is not influenced by the nature of the leaving group.
Z- Vinylic碲化物是通过在烯醇磷酸酯,乙酸酯,甲苯磺酸酯和三氟甲磺酸酯的Z / E混合物上通过立体立体乙烯基化合物进行立体选择性乙烯基取代而制得的。该反应对有机碲酸根的性质敏感。芳香族衍生物的反应比脂肪族衍生物慢。反应时间不受离去基团性质的影响。