Two experimentally simple steps [(Me3Sn)2, (Ph3P)4Pd; Ph3P![[double bond, length half m-dash]](https://www.rsc.org/images/entities/char_e006.gif)
CH2] serve to convert α,β-acetylenic aldehydes and ketones into (Z)-4-(trimethylstannyl)buta-1,3-dienes, which are useful intermediates for organic synthesis.
E. Piers and R. D. Tillyer, J. Chem. Soc., Perkin Trans. 1, 1989, 2124 DOI: 10.1039/P19890002124
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