Potassium Carbonate → Benzene, 1-chloro-4-ethynyl-

Reaction equation

[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]#[C:9][Si](C)(C)C)=[CH:4][CH:3]=1.C(=O)([O-])[O-].[K+].[K+]>CO.CCCCCC>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]#[CH:9])=[CH:4][CH:3]=1

Participants

Procedure

To a solution of 2(4-chlorophenyl)-1-trimethylsilylethyne Prepared in Stage 1 (30.90g:0.02 mole) in methanol was added potassium carbonate (0.276g:002 mole). The mixture was stirred at room temperature until starting material disappeared as monitored by gas liquid chromatography. After this time, solvent was removed in vacuo and the residue taken up in dichloromethane. The solution was dried and declourised over charcoal. Filtration, followed by removal of solvent gave a brown solid which was passed through silica in hexane. This gave pale yellow crystals (1.511g:55.3%)