Gold- and Silver-Catalyzed Reactions of Propargylic Alcohols in the Presence of Protic Additives.
Chemistry - A European Journal
4748 - 4758.
A wide range of primary, secondary and tertiary propargylic alcohols undergo a Meyer–Schuster rearrangement to give enones at room temperature in the presence of a gold(I) catalyst and small quantities of MeOH or 4-methoxyphenylboronic acid. The syntheses of the enone natural products isoegomaketone and daphenone were achieved using this reaction as the key step. The rearrangement of primary propargylic alcohols can readily be combined in a one-pot procedure with the addition of a nucleophile to the resulting terminal enone, to give β-aryl, β-alkoxy, β-amino or β-sulfido ketones. Propargylic alcohols bearing an adjacent electron-rich aryl group can also undergo silver-catalyzed substitution of the alcohol with oxygen, nitrogen and carbon nucleophiles. This latter reaction was initially observed with a batch of gold catalyst that was probably contaminated with small quantities of silver salt.
|Title:||Gold- and Silver-Catalyzed Reactions of Propargylic Alcohols in the Presence of Protic Additives|
|Open access status:||An open access version is available from UCL Discovery|
|Additional information:||This is the peer reviewed version of the following article: Pennell, MN; Turner, PG; Sheppard, TD; (2012) Gold- and Silver-Catalyzed Reactions of Propargylic Alcohols in the Presence of Protic Additives. Chemistry - A European Journal , 18 (15) 4748 - 4758. , which has been published in final form at 10.1002/chem.201102830. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving PubMed ID: 22374879|
|Keywords:||gold, homogeneous catalysis, Meyer-Schuster rearrangement, propargylic alcohols, silver|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry|
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