Santoro F, Mariani M, Zaccheria F, Psaro R, Ravasio N. Selective synthesis of thioethers in the presence of a transition-metal-free solid Lewis acid.
Beilstein J Org Chem 2017;
12:2627-2635. [PMID:
28144333 PMCID:
PMC5238612 DOI:
10.3762/bjoc.12.259]
[Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 11/16/2016] [Indexed: 11/23/2022] Open
Abstract
The synthesis of thioethers starting from alcohols and thiols in the presence of amorphous solid acid catalysts is reported. A silica alumina catalyst with a very low content in alumina gave excellent results in terms of both activity and selectivity also under solvent-free conditions. The reaction rate follows the electron density of the carbinol atom in the substrate alcohol and yields up to 99% and can be obtained for a wide range of substrates under mild reaction conditions.
Collapse