Iridium(<scp>i</scp>) hydroxides in catalysis: rearrangement of allylic alcohols to ketones
作者:David J. Nelson、José A. Fernández-Salas、Byron J. Truscott、Steven P. Nolan
DOI:10.1039/c4ob01428f
日期:——
The iridium(I) hydroxide complex [Ir(OH)(COD)(IiPr)] has been shown to be a competent catalyst for the rearrangement of allylic alcohols to ketones. Reactions proceed in short reaction times (1–1.5 h) with microwave heating, in the absence of additives.
diallylic alcohols in acidic medium is disclosed, highlighting the difference between strong Lewis acid and mild Brønsted acid catalysis. In the presence of bismuth(III) triflate, allylicalcohol activation affords diversely substituted cyclopentenones in a Nazarov-type electrocyclization, whereas activation of the thioenol ether by p-toluenesulfonic acid provides an entry to α-sulfenylated β,γ-unsaturated
1,<i>n</i>-Rearrangement of Allylic Alcohols Promoted by Hot Water: Application to the Synthesis of Navenone B, a Polyene Natural Product
作者:Pei-Fang Li、Heng-Lu Wang、Jin Qu
DOI:10.1021/jo5004086
日期:2014.5.2
n-rearrangement (n = 3, 5, 7, 9) of allylic alcohols. In some cases, the rearrangement reactions joined isolated C–C double or triple bonds to generate conjugated polyene or enyne structure motifs. We used the 1,3-rearrangement reaction of an allylic alcohol in hot water as part of an attractive new strategy for construction of the polyene naturalproduct navenone B by iterative use of a Grignard reaction
One-Pot Conversion of Allylic Alcohols to α-Methyl Ketones via Iron-Catalyzed Isomerization–Methylation
作者:Daniel E. Latham、Kurt Polidano、Jonathan M. J. Williams、Louis C. Morrill
DOI:10.1021/acs.orglett.9b02900
日期:2019.10.4
A one-pot iron-catalyzed conversion of allylic alcohols to α-methyl ketones has been developed. This isomerization-methylation strategy utilized a (cyclopentadienone)iron(0) carbonyl complex as precatalyst and methanol as the C1 source. A diverse range of allylic alcohols undergoes isomerization-methylation to form α-methyl ketones in good isolated yields (up to 84% isolated yield).