18-Crown-6, 1 X 1 g (274984-1G)

18-Crown-6 is a macrocyclic polyether used to synthesize ionic liquid based crown-ether coordination compounds. 18-Crown-6 is the simplest crown ether that can be prepared by reacting triethylene glycol with triethylene glycol dichloride in the presence of potassium hydroxide as a base. 18-Crown-6 can solubilize metal salts, particularly potassium salts, in nonpolar and dipolar aprotic solvents. Thus, it is widely used as a phase transfer catalyst. It can also be used as a metal complexing agent to prepare a variety of molecular complexes. 18-Crown-6 can be used as a catalyst for:        • N-alkylation of heterocyclic compounds in the presence of tert-butoxide base.       • Allylation of aldehydes to corresponding homoallylic alcohols using potassium allyltrifluoroborate.      •  Preparation of N-propargylpyrrole by the reaction of pyrrole with potassium hydroxide.      •  Polymerization of methacrylic esters and hindered alkyl acrylates.        • Chemoselective reduction of fused tetrazoles with NaBH₄ and potassium hydroxide. Macrocyclic polyethers with repeating (-CH₂CH₂O) units. The compounds are ionophoric (form stable complexes with cations).

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