An Efficient Method for the Selective Iodination of α,β-Unsaturated Ketones
作者:Anxin Wu、Zihua Wang、Guodong Yin、Jing Qin、Meng Gao、Liping Cao
DOI:10.1055/s-0028-1083200
日期:2008.11
An efficient approach to α,β-unsaturated a'-iodo ketones directly from α,β-unsaturatedketones by selective iodination at the a'-position, without effect on the doublebond and the activated benzene ring, in the presence of copper(II) oxide/iodine is described. The present method has the advantages of high yields, short reaction times, inexpensive reagents, mild reaction conditions, ease of manipulation
Vanadium-Catalyzed Coupling of Allenols with Electrophilic Halide Sources for the Formation of α-Halo-α′,β′-unsaturated Ketones
作者:Barry M. Trost、Jacob S. Tracy、Tas Yusoontorn
DOI:10.1021/acs.orglett.9b00195
日期:2019.2.15
metal enolate formed from the 1,3-transposition of an allenol that is initiated by a cheap and earth-abundant vanadium oxo catalyst. Fluorine, chlorine, and bromine electrophiles can be utilized, and the resulting products can give rise to the introduction of nitrogen, oxygen, sulfur, and iodine nucleophiles α to the ketone through substitution chemistry.