Treatment of the β-trimethylstannyl α,β-unsaturated esters (3)–(8) with lithium di-isopropylamide in tetrahydrofuran (THF)[(3)–(5)] or THF–hexamethylphosphoramide [(6)–(8)], followed, in each case, by transfer of the resultant solution to a cold (–98 °C) solution of acetic acid in ether, provides exclusively the alkyl 3-trimethylstannylalk-3-enoates (9)–(14), respectively.
E. Piers and A. V. Gavai, J. Chem. Soc., Chem. Commun., 1985, 1241 DOI: 10.1039/C39850001241
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