Direct Synthesis of α-Iodoenones by IPy<sub>2</sub>BF<sub>4</sub>-Promoted Rearrangement of Propargylic Esters
作者:Tatiana Suárez-Rodríguez、Ángel L. Suárez-Sobrino、Alfredo Ballesteros
DOI:10.1021/acs.joc.8b01746
日期:2018.10.19
A direct access to α-iodoeones from iodonium ion and propargylic tosylates or acetates is described. Bis(pyridine) iodonium tetrafluoroborate (IPy2BF4, Barluenga’s reagent) promotes the rearrangement of these propargylic alcohol derivatives in mild conditions. The transformation gives β-unsubstituted, β-monosubstituted, and β,β-disubstituted α-iodoenones in high yields. β-Substituted α-iodoenones are
Practical Synthesis of Linear α-Iodo/Bromo-α,β-unsaturated Aldehydes/Ketones from Propargylic Alcohols via Au/Mo Bimetallic Catalysis
作者:Longwu Ye、Liming Zhang
DOI:10.1021/ol901346k
日期:2009.8.20
An efficient synthesis of α-iodo/bromo-α,β-unsaturated aldehydes/ketones directly frompropargylicalcohols is described. This reaction is catalyzed collaboratively by two metal complexes, Ph3PAuNTf2 and MoO2(acac)2, and Ph3PO as an additive helps suppress undesired enone/enal formation. Notable features of this method include low catalyst loadings, mild reaction conditions, and mostly good to excellent