Schlatzer T, Schröder H, Trobe M, Lembacher‐Fadum C, Stangl S, Schlögl C, Weber H, Breinbauer R. Pd/BIPHEPHOS is an Efficient Catalyst for the Pd-Catalyzed
S-Allylation of Thiols with High
n-Selectivity.
Adv Synth Catal 2020;
362:331-336. [PMID:
32063821 PMCID:
PMC7004212 DOI:
10.1002/adsc.201901250]
[Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 10/22/2019] [Indexed: 11/06/2022]
Abstract
The Pd-catalyzed S-allylation of thiols with stable allylcarbonate and allylacetate reagents offers several advantages over established reactions for the formation of thioethers. We could demonstrate that Pd/BIPHEPHOS is a catalyst system which allows the transition metal-catalyzed S-allylation of thiols with excellent n-regioselectivity. Mechanistic studies showed that this reaction is reversible under the applied reaction conditions. The excellent functional group tolerance of this transformation was demonstrated with a broad variety of thiol nucleophiles (18 examples) and allyl substrates (9 examples), and could even be applied for the late-stage diversification of cephalosporins, which might find application in the synthesis of new antibiotics.
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