[N+:1]([C:4]1[CH:5]=[C:6]([SH:10])[CH:7]=[CH:8][CH:9]=1)([O-:3])=[O:2].Br[C:12]1[CH:13]=[N:14][CH:15]=[CH:16][CH:17]=1.O=C1CCCCC1C(OCC)=O.C(=O)([O-])[O-].[Cs+].[Cs+]>CS(C)=O.[Cu](I)I>[N+:1]([C:4]1[CH:5]=[C:6]([S:10][C:12]2[CH:13]=[N:14][CH:15]=[CH:16][CH:17]=2)[CH:7]=[CH:8][CH:9]=1)([O-:3])=[O:2]3-nitrophenylmercaptan (5 g, 32 mmol), 3-bromopyridine (6.1 g, 38.6 mmol), ethyl 2-oxocyclohexylformate (1.1 g, 6.5 mmol), copper iodide (608 mg, 4.2 mmol), cesium carbonate (2.3 g, 70.6 mmol) were dissolved in 500 ml of DMSO, reacted under microwaves at 100° C. for 8 h. After being extracted with water and DCM, the organic phase was dried and separated with column chromatography to obtain an object product 3.2 g.
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