Hydrofluoric Acid → HCID 13560838, compound
Reaction equation
[CH3:1][NH:2][S:3]([CH2:6][C:7]1[CH:8]=[C:9]2[C:13](=[CH:14][CH:15]=1)[NH:12][C:11]([Si](C)(C)C)=[CH:10]2)(=[O:5])=[O:4].F>CC#N>[CH3:1][NH:2][S:3]([CH2:6][C:7]1[CH:8]=[C:9]2[C:13](=[CH:14][CH:15]=1)[NH:12][CH:11]=[CH:10]2)(=[O:5])=[O:4]Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
5-[[(Methylamino)sulfonyl]methyl]-2-(trimethylsilyl)-1H-indole (4) (1.0 g, 0.00356 mol) was dissolved in CH3CN (40 mL). Concentrated hydrofluoric acid (HF, 1 mL) was added and the mixture was stirred at RT for 3 h. The solvent was removed in vacuo and the residue was dissolved in EtOAc. The organic phase was extracted sequentially with saturated aqueous NaHCO3 and brine, dried over MgSO4, filtered and concentrated in vacuo. Silica gel chromatography (10-100% EtOAc gradient in hexane) of the residue gave the product (5) (0.52 g, 65.2%).