Silacyclobutane as “Carbanion Pump” in Anionic Polymerization. 2. Effective Trapping of the Initially Formed Carbanion by Diphenylethylene

Md. Rezaul Karim Sheikh, Tharanikkarasu Kannan, Ichiro Imae, Yusuke Kawakami

Macromolecules · 2001 · 35 citations · 9 references

Concepts

Abstract

The initially formed carbanion from dimethylsilacyclobutane and potassium tert -butoxide was trapped in as high as 88% yield in the presence of 1,1-diphenylethylene as evidenced by quenching with methyl iodide. The initiator efficiency of 76% was obtained by using a combination of potassium tert -butoxide, dimethylsilacyclobutane, and 1,1-diphenylethylene carbanion pump system as an initiator in the polymerization of methyl methacrylate.

References

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