α-Chloroenolates; VI<sup>1</sup>. Diethyl 1-Chloro-1-lithio-2-oxoalkanephosphonates; Synthesis of α-Chloro-α,β-unsaturated Ketones
作者:Jean VILLIERAS、Pierre PERRIOT、Jean NORMANT
DOI:10.1055/s-1978-24657
日期:——
Vanadium(V)-mediated rearrangement/halogenation cascade: Synthesis of α-haloenones from propargyl alcohols
作者:Meng Zhao、Justin T. Mohr
DOI:10.1016/j.tet.2016.12.055
日期:2017.7
A method is described for the oxidative Meyer–Schuster-type rearrangement of propargylic alcohols to (Z)-α-chloro- and α-iodoenones using VOCl3 as a multifunctional reagent. The vanadium reagent is found to serve as rearrangement promoter as well as an active chlorenium ion donor. Yields are improved when VOCl3 is employed in conjunction with N-halosuccinimide reagents, giving some insights into the