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Synlett 2017; 28(10): 1195-1200
DOI: 10.1055/s-0036-1588144
DOI: 10.1055/s-0036-1588144
letter
NaI-Mediated Acetamidosulfenylation of Alkenes with Bunte Salts as Thiolating Reagent Leading to β-Acetamido Sulfides
Further Information
Publication History
Received: 05 December 2016
Accepted after revision: 14 January 2017
Publication Date:
03 February 2017 (online)
![](https://www.thieme-connect.de/media/synlett/201710/lookinside/thumbnails/st-2016-w0819-l_10-1055_s-0036-1588144-1.jpg)
Abstract
A direct and efficient method for the acetamidosulfenylation reaction of alkenes was developed, in which NaI was used as a catalyst, DMSO as the oxidant, nitriles as both the solvent and nucleophiles and stable, readily available Bunte salts as thiolating reagents. The reactions were carried out under mild conditions generating β-acetamido sulfides in good yields. Moreover, the reaction can be performed when alcohols are used as nucleophiles providing the corresponding β-alkoxysulfides in moderate yields, respectively.
Supporting Information
- Supporting information for this article is available online at http://dx.doi.org/10.1055/s-0036-1588144.
- Supporting Information
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- 16 General Procedure for the Synthesis of Compound 4 or 5 NaI (0.06 mmol), H2O (0.60 mmol) and Bunte salt 2 (0.45 mmol) were added to a solution of nitrile 3 containing alkene 1 (0.30 mmol), followed by the addition of DMSO (0.60 mmol). The reaction mixture was stirred in a sealed tube at 100 °C for 9 h. After completion of the reaction, the reaction mixture was diluted with EtOAc, and quenched with sat. Na2S2O3 solution and extracted with EtOAc (3 × 10 mL). The organic layer was washed with water and dried over anhydrous Na2SO4. The solvent was evaporated in vacuo, and the residue was subjected to column chromatography using EtOAc in PE as the eluent to afford the pure target product 4 or 5. Compound 4b was obtained in 82% yield (73.7 mg) according to the general procedure for the synthesis of 4 as a white solid. 1H NMR (400 MHz, CDCl3): δ = 7.32–7.23 (m, 5 H), 7.12 (s, 4 H), 6.03 (d, J = 8.0 Hz, 1 H), 5.12 (q, J = 8.0 Hz, 1 H), 3.59 (q, J = 12 Hz, 2 H), 2.86–2.74 (m, 2 H), 2.32 (s, 3 H), 1.95 (s, 3 H). 13C NMR (100 MHz, CDCl3): δ = 169.5, 138.0, 137.7, 137.4, 129.4, 129.0, 128.5, 127.1, 125.4, 51.8, 37.1, 36.4, 23.4, 21.1. ESI-HRMS: m/z calcd for C18H21NOS [M + Cl]+: 334.1027; found: 334.1036. General Procedure for the Synthesis of Compound 7 NaI (0.06 mmol) and 2a (0.45 mmol) was added to a solution of acetonitrile 3a containing styrene 1a (0.30 mmol) and alcohol (100 μL) or 2-allylphenol 6d (0.3 mmol), followed by DMSO (0.60 mmol). The reaction mixture was stirred at 90 °C for 6–9 h. After completion of the reaction, the reaction mixture was diluted with EtOAc, quenched with sat. Na2S2O3 solution and extracted twice with EtOAc (2 × 15 mL). The organic layer was washed with water and dried over anhydrous Na2SO4. The solvent was evaporated in vacuo, and the residue was subjected to column chromatography using EtOAc in PE as the eluent to afford the pure target product 7.Compound 7a was obtained in 42% yield (32.7 mg) according to the general procedure for the synthesis of 7 as a colorless liquid. 1H NMR (400 MHz, CDCl3): δ = 7.37–7.21 (m, 10 H), 4.31 (q, J = 8.0 Hz, 1 H), 3.69 (q, J = 12.0 Hz, 1 H), 3.42–3.33 (m, 1 H), 2.84 (q, J = 8.0 Hz, 1 H), 2.60 (q, J = 8.0 Hz, 1 H), 1.20 (t, J =8.0 Hz, 3 H). 13C NMR (100 MHz, CDCl3): δ = 141.6, 138.6, 129.0, 129.4, 128.4, 128.4, 127.8, 126.9, 126.7, 82.3, 64.5, 38.7, 37.2, 15.3. ESI-HRMS: m/z calcd for C17H20OS [M + Na]+: 295.1127; found: 295.1120.