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Synlett 2018; 29(05): 655-657
DOI: 10.1055/s-0036-1591723
DOI: 10.1055/s-0036-1591723
letter
Copper-Catalyzed Production of Diaryl Sulfides Using Aryl Iodides and a Disilathiane
This work was partially supported by JSPS KAKENHI Grant Number JP16K21400.Further Information
Publication History
Received: 20 September 2017
Accepted after revision: 19 October 2017
Publication Date:
23 November 2017 (online)
Abstract
A disilathiane was found to be a novel S1 source for the copper-catalyzed synthesis of diaryl sulfides using aryl iodides. The reaction of iodoarenes and hexamethyldisilathiane, (Me3Si)2S, in the presence of a catalytic amount of CuI/1,10-phenanthroline provided various types of diaryl sulfides in good yields.
Key words
copper catalyst - aryl iodides - disilathiane - carbon–sulfur bond formation - diaryl sulfidesSupporting Information
- Supporting information for this article is available online at https://doi.org/10.1055/s-0036-1591723.
- Supporting Information
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- 14 General Procedure To a screw-capped test tube under a nitrogen atmosphere, 1,10-phenanthroline (0.05 mmol, 9.0 mg), iodobenzene 1 (1 mmol), K2CO3 (1 mmol, 138.2 mg), CuI (0.05 mmol, 9.5 mg), N-methyl-2-pyrrolidone (1 mL), and 1,1,1,3,3,3-hexamethyldisilathiane (0.5 mmol, 89.2 mg) were added. After the tube was sealed with a cap, the mixture was heated at 120 °C for 14 h. After the reaction, H2O was added to the mixture, which was then extracted with EtOAc three times. The combined organic phases were evaporated under reduced pressure. The crude material was purified by silica gel column chromatography to give the corresponding diaryl sulfide 2. Diphenyl Sulfide (2a) The general procedure was followed with iodobenzene (1a, 202.7 mg, 0.99 mmol) for 14 h. Column chromatography (hexane) afforded 2a as a colorless oil (85.0 mg, 92%). 1H NMR (500.2 MHz, CDCl3): δ = 7.23 (t, J = 7.5 Hz, 2 H, ArH), 7.29 (t, J = 7.5 Hz, 4 H, ArH), 7.34 (d, J = 7.5 Hz, 4 H, ArH). 13C NMR (125.8 MHz, CDCl3): δ = 127.0, 129.2, 131.0, 135.8. LRMS (EI): m/z (% relative intensity) = 187 (17) [M + 1]+, 186 (100), 185 (69), 184 (27), 154 (14), 134 (14), 77 (15), 51 (20).
- 15 An alkyl iodide was also applicable for this reaction (Scheme 4).
- 16 See the Supporting Information for further results to support the proposed mechanism.
Representative reviews: