The Question of Electrophilic vs Nucleophilic Addition of Cyclic β-Dicarbonyl Phenyliodonium Ylides: Electrophilic Cycloaddition of Diphenylketene
作者:Anna Antos、Yiannis Elemes、Adonis Michaelides、John, A. Nyxas、Stavroula Skoulika、Lazaros P. Hadjiarapoglou
DOI:10.1021/jo3020787
日期:2012.12.7
The reaction of β-dicarbonyl phenyliodonium ylides with diphenylketene at room temperature affords mixtures of lactone and aurone derivatives. The initial electrophilic attack of the iodonium ylide on the Cβ position of the diphenylketene, followed by cyclization of the zwitterionic species, and subsequent ejection of iodobenzene, affords the lactone and aurone cycloadducts. Treatment of β-dicarbonyl
β-二羰基苯基碘化鎓碘化物与二苯乙烯酮在室温下反应,可得到内酯和金酮衍生物的混合物。对C的碘鎓叶立德初始电攻击β的二苯基乙烯酮的位置,其次是两性离子物质的环化,和碘代苯的后续喷射,得到内酯和噢哢cycloadducts。用酰氯处理β-二羰基碘鎓碘化物,可得到具有良好产率或优异产率的α-氯烯酮。