Reaction of the lithium or cerium(III) anion of 3-alkyl or 3-aryl substituted 3-trimethylsilylprop-1-yne 1 with aldehydes or ketones afforded 1-hydroxy-4-trimethylsilylbut-2-ynes 2 in good yields. Conversion of the silyl prop-2-ynylic alcohols 2 into the corresponding acetates 3 followed by tetrabutylammonium fluoride-induced, 1,4-elimination gave alkyl and aryl substituted buta-1,2,3-trienes 4 in good yields.
H. Chow, X. Cao and M. Leung, J. Chem. Soc., Perkin Trans. 1, 1995, 193 DOI: 10.1039/P19950000193
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